24277 + Interview Questions in Biology in Class 12 Page 424 InterviewSolution

21151.	Question : Assertion : Marriageable age of Indian females and males is 18 years and 21 years, respectively. Reason : Under normal conditions, a girl child will release around 450 ova in her lifetime.
Answer» If both ASSERTION and Reason are true but the reason is the correct explanation of the assertion, then mark (1). If both Assertion and Reason are true but the reason is not the correct explanation of the assertion, then mark (2). If Assertion is true but Reason is false, then mark (3). If both Assertion and Reason are false, then mark (4). ANSWER :C

Discussion

21152.	Question : Assertion: Mass selection is advantageous in self-pollinated plants. Reason: Self-pollinated plants retain the selected traits in the progeny as they are homozygous.
Answer» If both Assertion and Reason are TRUE and the Reason is the correct EXPLANATION of the Assertion. If both Assertion and Reason are true and the Reason is not the Reason is not the correct explanation of the assertion If assertion is true but the Reason are false If both Assertion and Reason are false Answer :A

Discussion

21153.	Question : Assertion: Many physical and chemical agents induce inheritable mutations. Reason: Germ cells are not immune to the changes in environmental factors.
Answer» If both Assertion and Reason are TRUE and the Reason is the correct explanation of the Assertion If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. If Assertion is true but the Reason is FALSE. If both Assertion and Reason are false. Answer :A

Discussion

21154.	Question : Assertion: Many hydrophytes lack roots. Reason: Roots are used for balancing
Answer» If both ASSERTION and REASON are TRUE and the Reason is the correct EXPLANATION of the Assertion. If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. If Assertion is true but the Reason is false If both Assertion and Reason are false. Solution :If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.

Discussion

21155.	Question :Assertion :-Main function of stem is spreading out branches bearing leaves, flowers and fruits. Reason :-Usually monocot stem is differentiated into nodes and internodes.
Answer» If both Assertion & Reason are True & the Reason is a CORRECT EXPLANATION of the Assertion. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion. If Assertion is True but the Reason is False If both Assertion & Reason are false Answer :B

Discussion

21156.	Question : Assertion :- Main function of stem is spreading out branches bearing leaves, flowers and fruits. Reason :- Usually monocot stem is differentiated into nodes and internodes.
Answer» If both ASSERTION & REASON are True & Reason is a correct EXPLANATION of the Assertion. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion. If Assertion is True but the Reason is False. If both Assertion & Reason are false. Answer :B

Discussion

21157.	Question : Assertion: Macrophages occur only in the connective tissue. Reason: Role of neutrophils is different from that of macrophages.
Answer» If both Assertion and REASON are true and the Reason is the CORRECT explanation of the Assertion. If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. If Assertion is true but the Reason is FALSE. If both Assertion and Reason are false. ANSWER :D

Discussion

21158.	Question : Assertion: Macrophages are multipurpose cells of the body's defence mechanism. Reason: They carry on phagocytosis, display the antigens of the engulfed microbes to the lymphocytes and secrete interleukin-I
Answer» If both Assertion and Reason are TRUE and the Reason is the CORRECT explanation of the Assertion. If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. If Assertion is true but the Reason is false. If both Assertion and Reason are false. ANSWER :A

Discussion

21159.	Question :Assertion LSD and marijuana are clinically used as analgesics. Reason Both these drugs suppress brain function.
Answer» Both Assertion and REASON are true and Reason is the CORRECT EXPLANATION of Assertion Both Assertion and Reason are true but Reason is not the correct explanation of Assertion Assertion is true but Reason is false Both Assertion and Reason are false Answer :D

Discussion

21160.	Question : Assertion: Lung cancer is more common in industrial workers. Reason: Industrial smoke contains certain carcinogenic pollutants
Answer» If both Assertion and REASON are true and the Reason is the CORRECT EXPLANATION of the Assertion. If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. If Assertion is true but the Reason is false. If both Assertion and Reason are false. Answer :A

Discussion

21161.	Question : Assertion: Louis pasteur showed that in flask open to air, new living organisms appeared in the heat killed yeast culture. Reason: Life arise from pre-existing life.
Answer» Solution :Louis Pasteur, by careful expermentation,demostrated that LIFE comes only from pre-existing life. He observed that in pre-sterlised closed flasks, life did not COME from killed yeast while in anotehr falsk opento air, new iving organisms arose from kille dyeast. He showed that the source of the new apearing micro-organisms was the air and the organisms did not arise from the nuterient MEDIA.

Discussion

21162.	Question : Assertion :-Long thin and flexible petiole helps in maintenance of leaf temperature. Reason :-Long thin flexible petioles allow leaf blades to flutter in wind, thereby cooling the leaf and bringing fresh air to leaf surface.
Answer» If both Assertion & REASON are True & the Reason is a correct EXPLANATION of the Assertion. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion. If Assertion is True but the Reason is False If both Assertion & Reason are false Answer :A

Discussion

21163.	Question : Assertion :- Lipids whose molecular weight does not exceed 800 Dalton come under acid insoluble fraction. Reason :- Lipids are present not only as such but also arranged in structures like membranes during grinding these lipid form vesicle.
Answer» ANSWER :A

Discussion

21164.	Question : Assertion : Lipids whose molecular weight does not exceed 800 dalton come under acid insoluble fraction Reason: Lipids are parents not only as such but also arranged in structure like memebranses during grinding these lipid vesicle
Answer» If both ASSERTION & Reason are ture & the Reason is a CORRECT explanation of the Assertion If both Assertion & Reason AR True but Reason is not a correct EXPLANTATION of the Assertion If Assertion is True but the Reason is False If both Assertion & Reason are false Answer :A

Discussion

21165.	Question :Assertion :- Lens formula can be applied only for thin lenses Reason :- For thick lenses one cannot find image position.
Answer» If both ASSERTION & Reason are TRUE & the Reason is a correct explanation of the Assertion. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion. If Assertion is True but the Reason is FALSE. If both Assertion & Reason are False. ANSWER :C

Discussion

21166.	Question : Assertion: Life originated in water. Reason: Primitive waterbodies were alkaline.
Answer» If both ASSERTION and REASON are true and the Reason is the CORRECT EXPLANATION of the Assertion If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. If Assertion is true but the Reason is false. If both Assertion and Reason are false. Answer :B

Discussion

21167.	Question : Assertion: Lemmings of Tundra follow population fluctuations. Reason: These show sudden increase in population in shorl time followed by population crash.
Answer» If both Assertion and REASON are TRUE and the Reason is the CORRECT EXPLANATION of the Assertion. If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. If Assertion is true but the Reason is false If both Assertion and Reason are false. Solution :If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

Discussion

21168.	Question : Assertion: Leguminous plants are the best preferred for crop rotation.Reason: They have root nodules which have nitrogen-fixing bacteria Clostridium.
Answer» If both ASSERTION and REASON are true and the Reason is the correct explanation of the Assertion If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. If Assertion is true but the Reason is false. If both Assertion and Reason are false. Answer :C

Discussion

21169.	Question : Assertion: Lederberg's experiment explains the genetic basis of adaptations in bacteria. Reason: Certain bacterial cells become penicillin-resistant in response to penicillin.
Answer» If both Assertion and REASON are true and the Reason is the correct EXPLANATION of the Assertion If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. If Assertion is true but the Reason is false. If both Assertion and Reason are false. Answer :C

Discussion

21170.	Question : Assertion : Lederberg's experiment explains the genetic basis of adaptations in bacteria. Reason: Certain bacterial cells become penicillin-resistant in response to penicillin.
Answer» If both ASSERTION and Reason are TRUE and Reason is a CORRECT EXPLANATION of Assertion If both Assertion and Reason are true but Reason is not a correct explanation of Assertion. If Assertion is true but Reason is false If both Assertion and Reason are false Solution :If Assertion is true but Reason is false

Discussion

21171.	Question : Assertion :- Leaves show acropetal arrangement on plant . Reason :- Leaves arise from shoot apical meristem.
Answer» If both ASSERTION & REASON are TRUE & Reason is a correct explanation of the Assertion. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion. If Assertion is True but the Reason is False. If both Assertion & Reason are false. Answer :A

Discussion

21172.	Question :Assertion :-Leaves show acropetal arrangement on plant. Reason :-Leaves arise from shoot apical meristem.
Answer» If both ASSERTION & REASON are True & the Reason is a correct EXPLANATION of the Assertion. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion. If Assertion is True but the Reason is False If both Assertion & Reason are false Answer :A

Discussion

21173.	Question :Assertion: Law of independent assortment holds good for the gene pairs that occur in different pairs of the chromosomes.Reason: It is the chromosome and not the individual gene which segregates during gamete formation.
Answer» If both ASSERTION and REASON are TRUE and the Reason is the CORRECT EXPLANATION of the Assertion. If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. If Assertion is true but the Reason is false. If both Assertion and Reason are false. Answer :A

Discussion

21174.	Question : Assertion : Lateral line system is found in fishesand aquatic larval amphibians . Reason : Lateral line system has receptorswhichare the clusters of sensory cells derived from ectoderm .
Answer» If both the assertion and REASON are TRUE andreason is correct explanation of the assertion . If both the assertion and reason are true but reason is not a correct explanation of the assertion . If the assertion is true but the reason is false. If both assertion and reason are false. SOLUTION :Lateral line system is a SENSORY system of fishesand AQUATIC and larval amphibians whose receptors are clusters of sensory cellsderived from ectoderm. These clusters of sensory cells are called neuromast organs.

Discussion

21175.	Question : Assertion : Large number of methanogens bacteria are found in dung of cattle.Reason : The excreta (dung) is used to prepare biogas. (A) Assertion and Reason are true and Reason is the correct explanation of Assertion. (B) Assertion and Reason are true but Reason is not the correct explanation of Assertion (C) Both Assertion and Reason are false. (D) Assertion is true but reason is false
Answer» ASSERTION and REASON are TRUE and Reason is the correct EXPLANATION of Assertion. Assertion and Reason are true but Reason is not the correct explanation ofAssertion Both Assertion and Reason are false. Assertion is true but reason is false Solution :Assertion and Reason are true and Reason is the correct explanation of Assertion.

Discussion

21176.	Question : Assertion :Lac operon is a repressible operon. Reason : The product of gene activity stops the activity of the said gene.
Answer» If both assertion and reason are true and reason is the correct explanation of assertion If both assertion and reason are true butreason is notthe correct explanation of assertion If assertion is true but reason is false if both assertion and reason are false. Solution :(d): An operon is a PART of genetic material (or DNA) which acts as a SINGLE regualted unit havingone or more STRUCTURAL GENES , an operator gene, a promoter gene,aregulator gene, a repressor and inducer or corepressor (from outside). Lac operon is an inducibleopera. An inducible operon system is a regulatedunit of genetic material which is switched on in response to the presnce of a chemcial.

Discussion

21177.	Question : Assertion : Kidney transplant from a non-matching donor gets rejected. Reason : Cell mediated immunity mediated by B-lymphocytes reject it.
Answer» Both A and R are true and R is the CORRECT explanation of A. Both A and R are true but R is not correct explanation of A A is true but R is false A and R are false Answer :C

Discussion

21178.	Question : Assertion: It is beneficial to feed the new born infants on mother's milk. Reason: It develops deep affection between the offspring and mother.
Answer» If both ASSERTION and Reason are true and the Reason is the correct explanation of the Assertion. If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. If Assertion is true but the Reason is false. If both Assertion and Reason are false. ANSWER :B

Discussion

21179.	Question :Assertion :- Ionization energy of Ne is greater as compare to Ne^+. Reason :- Ne has p^6 (full filled electronic configuration) but Ne^+ has p^5 configuration of outermost subshell.
Answer» If both Assertion & REASON are TRUE & the Reason is a correct explanation of the Assertion. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion. If Assertion is True but the Reason is FALSE. If both Assertion & Reason are False. Answer :D

Discussion

21180.	Question : Assertion :- Ion-induced dipole interaction is stronger than dipole-induced dipole interaction. Reason :- Accumulated charges on the molecule in case of ion-induced dipole is more compared to that in case of dipole interaction.
Answer» If both Assertion & REASON are TRUE & the Reason is a CORRECT explanation of the Assertion. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion. If Assertion is True but the Reason is False. If both Assertion & Reason are False. ANSWER :A

Discussion

21181.	Question : Assertion: Iodine deficiency may lead to irregular menstrual cycle Reason: Estrogen and progesterone level becomes low
Answer» If both ASSERTION and REASON are true and reason is the CORRECT explanation of assertion. If both assertion and reason are true but reason is not the correct explanation of assertion. If assertion is true but reason is false. If both assertion and reason are false. Answer :C

Discussion

21182.	Question : Assertion Invertase is manufactured from Aspergillus oryzae. Reason Amylase is produced by Saccharmyces cerevisiae.
Answer» Solution :AMYLASE is produced by Aspergillus ORYZAE, while invertase from Saccharomyces CEREVISIAE.

Discussion

21183.	Question : Assertion: Interspecific hybrids are important in breeding for disease resistance. Reason: All the sugarcane varieites being cultivated today for diseases resistance. Reason: All the sugarcane varieties being cultivated today are interspecific hybrids.
Answer» Both Assertion and Reason are true and Reason is correct explanation of Assertion. Both Assertion and Reason are true, but reason is not the correct explanation of Assertion Assertion is true, but the Reason is false Assertion is false, but the Reason is true Solution :Hybridisation between different RELATED species is known as INTERSPECIFIC hybridisation. Interspecific hybrids are very IMPORTANT in plant BREEDING particularly INI breeding for disease resistance. Some interspecific varieities being cultivated today are interspecific hybrids.

Discussion

21184.	Question : Assertion: Interferons help eliminate viral infections. Reason: Interferons released by infected cells reach the nearby uninfected cells and make them resistant to viral infection.
Answer» If both ASSERTION and Reason are TRUE and the Reason is the CORRECT EXPLANATION of the Assertion. If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. If Assertion is true but the Reason is false. If both Assertion and Reason are false. ANSWER :A

Discussion

21185.	Question : Assertion: Interferons are effective against viruses.Reason: Proteins which can be synthesised only be genetic engineering are effective against viruses.
Answer» ANSWER :C

Discussion

21186.	Question : [A]: Interferons are a type of antibodies produced by body cells infected by bacteria.[R]: Interferons stimulate inflammation at the site of injury
Answer» If both Assertion and Reason are TRUE and the Reason is the correct explanation of the Assertion. If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. If Assertion is true but the Reason is false. If both Assertion and Reason are false. ANSWER :D

Discussion

21187.	Question :Assertion: Interferons are a type of antibodies produced by cells infected by bacteria. Reason: Interferons stimulate inflammation at the site of injury.
Answer» ANSWER :D

Discussion

21188.	Question : Assertion : Insulin is a type of antibiotic Reason : Insulin is synthesized by microbes by the process of fermentation.
Answer» If both ASSERTION and REASON are TRUE and Reason is a CORRECT EXPLANATION of Assertion. If both Assertion and Reason are true but Reason is not a correct explanation of Assertion It Assertion and true but Reason is false. If both Assertion and Reason are false. Answer :D

Discussion

21189.	Question : Assertion: Insulin is a type of antibiotic. Reason: It is synthesised by the process of fermentation
Answer» If both Assertion and Reason are true and the Reason is the CORRECT EXPLANATION of the Assertion. If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. If Assertion is true but the Reason is false. If both Assertion and Reason are false. Answer :D

Discussion

21190.	Question : Assertion: Insulin is a type of antibiotic.Reason: Insulin is synthesised by microbes by the process of fermentation.
Answer» If both ASSERTION and REASON are TRUE and the Reason is the CORRECT EXPLANATION of the Assertion If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. If Assertion is true but the Reason is false. If both Assertion and Reason are false. Answer :D

Discussion

21191.	Question : Assertion:- Inflorescence in Compositae is capitulum. Reason:- Compositae is a dicot family.
Answer» If both ASSERTION & Reason are True & the Reason is a correct explanation of the Assertion. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion. If Assertion is True but the Reason is FALSE If both Assertion & Reason are false Answer :B

Discussion

21192.	Question : Assertion :- Innate immunity is of great importance in early life years. Reason :- Innate immunity is also called congenital immunity and protects new born since birth.
Answer» If both ASSERTION & Reason are True & the Reason is a CORRECT explanation of the Assertion. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion. If Assertion is True but the Reason is FALSE. If both Assertion & Reason are False. ANSWER :A

Discussion

21193.	Question : Assertion: Infundibulum is a funnel shaped part closer to ovary. Reason: The edges of infundibulum helps in collection of the after ovulation.
Answer» Solution :In humna females each FALLOPIAN tube EXTENDS from the periphery of each oveary to the uterus, the part closer to the ovary is the funnel SHAPED infundibulum. The edges of the infundibulum possess finger-like projections called fimbriae, which help in collection of the OVUM after ovulation.

Discussion

21194.	Question : Assertion: In wheat and sugarcane, pollination takes place by water. Reason: Water is required for irrigation of wheat and sugarcane.
Answer» If both Assertion and REASON are TRUE and Reason is corret EXPLANATION of Assertion If both Assertion and Reason are true and Reason is not corret explanation of Assertion If Assertion is true but Reason is false If both Assertion and Reason are false Answer :D

Discussion

21195.	Question : Assertion: Infection of the urethra is more common in males than in the females. Reason: Urethra is shorter in the males than in the females.
Answer» (a) If both ASSERTION and REASON are true and the Reason is the CORRECT explanation of the Assertion. (b) If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. (C) If Assertion is true but the Reason is false. (d) If both Assertion and Reason are false. Answer :D

Discussion

21196.	Question : Assertion : In test-tude baby program, ova from wife/donor (female) and sperms from husband/donor (male) are collected and are induced to form zygote under simulated conditions in laboratory. Reason : Embryos with more than 8 blastomeres are then transferred to fallopian tube (ZIFT) to complete its further development.
Answer» If both Assertion and REASON are true but the reason is the CORRECT explanation of the assertion, then mark (1). If both Assertion and Reason are true but the reason is not the correct explanation of the assertion, then mark (2). If Assertion is true but Reason is false, then mark (3). If both Assertion and Reason are false, then mark (4). Answer :C

Discussion

21197.	Question :Assertion :-In some xerophytic plants stem becomes green, flat, leaf like and leaves are modified into sapines. Reason :-In xerophytic areas rate of transpiration is high, so plants develop various adaptations to minimize transpiration.
Answer» If both ASSERTION & REASON are True & the Reason is a CORRECT explanation of the Assertion. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion. If Assertion is True but the Reason is False If both Assertion & Reason are false Answer :A

Discussion

21198.	Question : Assertion : In the ringing experiment, a narrow, continuous band of tissues external to they xylem is removed. Reason : Ringing experiment proves that xylem is involved in water transport.
Answer» Both the ASSERTION and Reason are true and Reason is the correct explanation of the Assertion. Both Assertion and Reason are true, but Reason is not the correct explanation of assertion Assertion is true, but Reason is false Assertion is false, but Reason is true Solution :In ringing eperiment, a continuous band of tissues external to the xylem is removed. When such plant is placed in the LIGHT, then after sometimes, the tissue above the ring BECOME SWOLLEN due to the accumulation of solutes because, due to swelling, solutes can not transport towards the root side

Discussion

21199.	Question : Assertion : In Sprirylina culture, half of the required nutrients added first and the rest in later . Reason: If all the nutrients are added first, it will affect the culture growth .
Answer» Both A and R are TRUE and R is the coorect explanation Of A . Both A and R are true but R is not the correct explanation A . A is true but R is false . Both A and R are false . ANSWER :A::B::C::D

Discussion

21200.	Question : Assertion :- In some xerophytic plants stem becomes green , flat,leaf like and leaves are modified into spines . Reason :-In xerophytic areas rate of transpiration is high , soplants develop various adaptions to minimize transpiration.
Answer» If both ASSERTION & REASON are True & Reason is a CORRECT explanation of the Assertion. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion. If Assertion is True but the Reason is False. If both Assertion & Reason are false. Answer :A

Discussion

Explore topic-wise InterviewSolutions in .

Question : Assertion : Marriageable age of Indian females and males is 18 years and 21 years, respectively. Reason : Under normal conditions, a girl child will release around 450 ova in her lifetime.

Question : Assertion: Mass selection is advantageous in self-pollinated plants. Reason: Self-pollinated plants retain the selected traits in the progeny as they are homozygous.

Question : Assertion: Many physical and chemical agents induce inheritable mutations. Reason: Germ cells are not immune to the changes in environmental factors.

Question : Assertion: Many hydrophytes lack roots. Reason: Roots are used for balancing

Question :Assertion :-Main function of stem is spreading out branches bearing leaves, flowers and fruits. Reason :-Usually monocot stem is differentiated into nodes and internodes.

Question : Assertion :- Main function of stem is spreading out branches bearing leaves, flowers and fruits. Reason :- Usually monocot stem is differentiated into nodes and internodes.

Question : Assertion: Macrophages occur only in the connective tissue. Reason: Role of neutrophils is different from that of macrophages.

Question : Assertion: Macrophages are multipurpose cells of the body's defence mechanism. Reason: They carry on phagocytosis, display the antigens of the engulfed microbes to the lymphocytes and secrete interleukin-I

Question :Assertion LSD and marijuana are clinically used as analgesics. Reason Both these drugs suppress brain function.

Question : Assertion: Lung cancer is more common in industrial workers. Reason: Industrial smoke contains certain carcinogenic pollutants

Question : Assertion: Louis pasteur showed that in flask open to air, new living organisms appeared in the heat killed yeast culture. Reason: Life arise from pre-existing life.

Question : Assertion :-Long thin and flexible petiole helps in maintenance of leaf temperature. Reason :-Long thin flexible petioles allow leaf blades to flutter in wind, thereby cooling the leaf and bringing fresh air to leaf surface.

Question : Assertion :- Lipids whose molecular weight does not exceed 800 Dalton come under acid insoluble fraction. Reason :- Lipids are present not only as such but also arranged in structures like membranes during grinding these lipid form vesicle.

Question : Assertion : Lipids whose molecular weight does not exceed 800 dalton come under acid insoluble fraction Reason: Lipids are parents not only as such but also arranged in structure like memebranses during grinding these lipid vesicle

Question :Assertion :- Lens formula can be applied only for thin lenses Reason :- For thick lenses one cannot find image position.

Question : Assertion: Life originated in water. Reason: Primitive waterbodies were alkaline.

Question : Assertion: Lemmings of Tundra follow population fluctuations. Reason: These show sudden increase in population in shorl time followed by population crash.

Question : Assertion: Leguminous plants are the best preferred for crop rotation.Reason: They have root nodules which have nitrogen-fixing bacteria Clostridium.

Question : Assertion: Lederberg's experiment explains the genetic basis of adaptations in bacteria. Reason: Certain bacterial cells become penicillin-resistant in response to penicillin.

Question : Assertion : Lederberg's experiment explains the genetic basis of adaptations in bacteria. Reason: Certain bacterial cells become penicillin-resistant in response to penicillin.

Question : Assertion :- Leaves show acropetal arrangement on plant . Reason :- Leaves arise from shoot apical meristem.

Question :Assertion :-Leaves show acropetal arrangement on plant. Reason :-Leaves arise from shoot apical meristem.

Question :Assertion: Law of independent assortment holds good for the gene pairs that occur in different pairs of the chromosomes.Reason: It is the chromosome and not the individual gene which segregates during gamete formation.

Question : Assertion : Lateral line system is found in fishesand aquatic larval amphibians . Reason : Lateral line system has receptorswhichare the clusters of sensory cells derived from ectoderm .

Question : Assertion :Lac operon is a repressible operon. Reason : The product of gene activity stops the activity of the said gene.

Question : Assertion : Kidney transplant from a non-matching donor gets rejected. Reason : Cell mediated immunity mediated by B-lymphocytes reject it.

Question : Assertion: It is beneficial to feed the new born infants on mother's milk. Reason: It develops deep affection between the offspring and mother.

Question :Assertion :- Ionization energy of Ne is greater as compare to Ne^+. Reason :- Ne has p^6 (full filled electronic configuration) but Ne^+ has p^5 configuration of outermost subshell.

Question : Assertion :- Ion-induced dipole interaction is stronger than dipole-induced dipole interaction. Reason :- Accumulated charges on the molecule in case of ion-induced dipole is more compared to that in case of dipole interaction.

Question : Assertion: Iodine deficiency may lead to irregular menstrual cycle Reason: Estrogen and progesterone level becomes low

Question : Assertion Invertase is manufactured from Aspergillus oryzae. Reason Amylase is produced by Saccharmyces cerevisiae.

Question : Assertion: Interspecific hybrids are important in breeding for disease resistance. Reason: All the sugarcane varieites being cultivated today for diseases resistance. Reason: All the sugarcane varieties being cultivated today are interspecific hybrids.

Question : Assertion: Interferons help eliminate viral infections. Reason: Interferons released by infected cells reach the nearby uninfected cells and make them resistant to viral infection.

Question : Assertion: Interferons are effective against viruses.Reason: Proteins which can be synthesised only be genetic engineering are effective against viruses.

Question : [A]: Interferons are a type of antibodies produced by body cells infected by bacteria.[R]: Interferons stimulate inflammation at the site of injury

Question :Assertion: Interferons are a type of antibodies produced by cells infected by bacteria. Reason: Interferons stimulate inflammation at the site of injury.

Question : Assertion : Insulin is a type of antibiotic Reason : Insulin is synthesized by microbes by the process of fermentation.

Question : Assertion: Insulin is a type of antibiotic. Reason: It is synthesised by the process of fermentation

Question : Assertion: Insulin is a type of antibiotic.Reason: Insulin is synthesised by microbes by the process of fermentation.

Question : Assertion:- Inflorescence in Compositae is capitulum. Reason:- Compositae is a dicot family.

Question : Assertion :- Innate immunity is of great importance in early life years. Reason :- Innate immunity is also called congenital immunity and protects new born since birth.

Question : Assertion: Infundibulum is a funnel shaped part closer to ovary. Reason: The edges of infundibulum helps in collection of the after ovulation.

Question : Assertion: In wheat and sugarcane, pollination takes place by water. Reason: Water is required for irrigation of wheat and sugarcane.

Question : Assertion: Infection of the urethra is more common in males than in the females. Reason: Urethra is shorter in the males than in the females.

Question :Assertion :-In some xerophytic plants stem becomes green, flat, leaf like and leaves are modified into sapines. Reason :-In xerophytic areas rate of transpiration is high, so plants develop various adaptations to minimize transpiration.

Question : Assertion : In the ringing experiment, a narrow, continuous band of tissues external to they xylem is removed. Reason : Ringing experiment proves that xylem is involved in water transport.

Question : Assertion : In Sprirylina culture, half of the required nutrients added first and the rest in later . Reason: If all the nutrients are added first, it will affect the culture growth .

Question : Assertion :- In some xerophytic plants stem becomes green , flat,leaf like and leaves are modified into spines . Reason :-In xerophytic areas rate of transpiration is high , soplants develop various adaptions to minimize transpiration.