24277 + Interview Questions in Biology in Class 12 Page 431 InterviewSolution

21501.	Question : Assertion (A): PCR is a amplification technique used in biotechnology. Reason (R): Using PCR multiple copies of DNA can be generated.
Answer» R EXPLAINS A. Both A and R are INCORRECT. A is CORRECT. R is incorrect. A and R are correct. R does not explains A. SOLUTION :R explains A.

Discussion

21502.	Question : Assertion (A): Ozone layer protects the UV rays entering the Earth. Reason (R): UV rays may cause melanoma.
Answer» A is RIGHT R is WRONG A is wrong R is right Both A and R are correct R EXPLAINS A Solution :R explains A

Discussion

21503.	Question : Assertion (A) : Ozone acts as a natural sun block.Reason (R ) : UV rays reaching the earth are deviated from earth.
Answer» A is CORRECT R is incorrect. A is incorrect R is correct. R explains A. Both A and R are incorrect Answer :C

Discussion

21504.	Question : Assertion (A) : Outbreeding never involves breeding between individuals of same breed. Reason (R) : Outbreeding is carried out between individuals of different breeds or species .
Answer» Both A and R are CORRECT and R is the correct EXPLANATION of A Both A and R are correct but R is not the correct explanation of A A is TRUE but R is false A is false and R is true Answer :D

Discussion

21505.	Question : Assertion (A): Organisms show three phases in their life cycle. Reason (R): Juvenile phase is a degenerative phase.
Answer» A is correct R but is incorrect BothA andR are correct R is the correct EXPLANATION for A A is not correct but R ISCORRECT Solution :A is correct R but is incorrect

Discussion

21506.	Question : Assertion (A): Oparin used the term coacervasesReason (R) : Coacervates are colloidal particles in aqueous environment
Answer» (a) Both A and R are INCORRECT (B) A and R are correct (C) Both A and R are correct . R explains A (d) A is correct R is INCORECT Solution :Both A and R are correct . R explains A

Discussion

21507.	Question : Assertion (A): Only one parent is required for natural vegetative propagation. Reason (R ): New individual plants produced are genetically identical.
Answer» SOLUTION :Both Assertion and REASON are TRUE and Reason is CORRECT EXPLANATION of Assertion

Discussion

21508.	Question : Assertion (A): On diagnosis. Ramu is reported to have under developed testis and gynaecomastia. Reason (R): His karyotype reveals XXY condition.
Answer» A is right but R is worng R EXPLAINS A Both A and R are wrong Both and R are right but R is not the correct explanation of A Answer :B

Discussion

21509.	Question : Assertion [A] : MRI is the best method to detect tumors. Reason [R]: It does not involve radiation.
Answer» A is correct and R is EXPLANATION to A. A is correct and R is not an explanation to A. A is true and R is WRONG. A is wrong and R is true. SOLUTION :A is correct and R is explanation to A.

Discussion

21510.	Question : Assertion (A): Monohybrid inheritance is the inheritance of a single character. Reason (R ) : It involves the inheritance of single allele of a single gene.
Answer» Assertion is TRUE and Reason is correct EXPLANANTION of Assertion. Assertion and Reason is true but Reason is not correct EXPLANATION of Assertion. Assertion is true and Reason is false. Both Assertion and Reason are false. Solution :Assertion is true and Reason is false.

Discussion

21511.	Question : Assertion (A): Movement of organism from one place to another and back is called migration. Reason (R): Eel is an example for aradromous migration
Answer» Both A and R are CORRECT R explain A A is correct R is INCORRECT R DOESNOT explain A Both A and R are incorrect Solution :Both A and R are correct R explain A

Discussion

21512.	Question : Assertion (A) : Microspores are the first cell of male gametophyte. Reason (R) : Microspores undergo development and forms pollen grains.
Answer» A is correct R is incorrect R EXPLAINS A Both A and R are incorrect Both A and R are correct . R does not explain R. Answer :B

Discussion

21513.	Question : Assertion .A.: Lipase enzyme is produced through micro-organisms in industries.Reason .R.: Lipases are used in Fermentation
Answer» A and R are TRUE and R is the CORRECT EXPLANATION of A. A and R are true but R is not the correct explanation of A. A is true but R is FALSE. Both A and R are false. Solution :A is true but R is false.

Discussion

21514.	Question : Assertion : Microorganisms such as lactobacillus and others commonly called lactic acid bacteria (LAB) grow in milk and convert it to curd.Reason : During growth, these bacteria produce acids that coagulate and partially digest the milk proteins(A) If both assertion and reason are true and reason is the correct explanation of assertion.(B) If both assertion and reason are true but reason is not the correct explanation of assertion.(C) If assertion is true but reason is false.(D) If both assertion and reason are false.
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. Solution :If both assertion and reason are true and reason is the correct explanation of assertion.

Discussion

21515.	Question : Assertion (A): Menopause refers to the absence of menstruation during pregnancy. Reason (R): Ovulation occurs during menstrual phase.
Answer» R EXPLAINS A. A is RIGHT R is WRONG. A and R are right. R does not explains A. Both A and R are wrong. Solution :Both A and R are wrong.

Discussion

21516.	Question : Assertion (A) : Liquid nitrogen is used in cryopreservation techniques. Reason (R ) : Gene bank DNA bank are the parts of germplasm conservation.
Answer» a) Both A and R are correct but R is not a correct EXPLANATION to A b) R EXPLAINS A c) A is correct R is incorrect d) Both A and R are incorrect Answer :A

Discussion

21517.	Question : Assertion (A) : IUD's are inserted inside the ovary. Reason (R ) : IUD's increases phagocytosis of sperms
Answer» Both A and R are CORRECT Both A and R are INCORRECT A is correct R is incorrect A is incorrect R is correct SOLUTION :A is incorrect R is correct

Discussion

21518.	Question : Assertion (A): It is advantageous to give the polio vaccines orally. Reason (R): It prevents reinfection by causing intestinal immunity.
Answer» Both (A) and (R) are TRUE and (R) is the CORRECT explana-tion of (A) Both (A) and (R) are true but (R) is not the correct EXPLANATION of (A) (A) is true but (R) is false Both (A) and (R) are false Solution :N//A

Discussion

21519.	Question : Assertion (A): Interferons are used to treat herpes zoster. Reason (R): Interferons are antiviral protein.
Answer» R EXPLAINS A. Both A and R are INCORRECT. A is CORRECT. R is incorrect. A and R are correct. R does not explains A. SOLUTION :R explains A .

Discussion

21520.	Question : Assertion (A) : Incubation is followed by Inoculation. Reason (R ) : Explant is inoculated to media.
Answer» a) Both A and R are correct but R is not a correct EXPLANATION to A b) R explains A c) A is correct R is incorrect d) Both A and R are incorrect Answer :B

Discussion

21521.	Question : Assertion (A) : In zoological parks, the animals are maintained in their natural habitat. Reason (R ) : Ex - situ conservation refers to protecting species in their natural habitat.
Answer» A is CORRECT R is INCORRECT. A is incorrect R is correct. R EXPLAINS A. Both A and R are incorrect Answer :D

Discussion

21522.	Question : Assertion .A.: In village areas biogas plants are developed.Reason .R.: Biogas is important for economy and cleanliness of the village area.(A) Both 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) Assertion is true and reason is false. (D) Assertion is false and reason is true.
Answer» Both 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 of assertion. Assertion is true and reason is false. Assertion is false and reason is true. Solution :Both assertion and reason are true and reason is the correct explanation of assertion.

Discussion

21523.	Question : Assertion (A): In scrotum, the temperature is maintained 2 - 3^@C lower than body temperature. Reason (R): Reduced temperature results in efficient sperm production.
Answer» (a) R EXPLAINS A. (B) A is RIGHT R is wrong. (c) A and R are right. R does not explains A. (d) Both A and R are wrong. Solution :R explains A.

Discussion

21524.	Question : Assertion (A) : In radiography experiment cells are arrested at metaphase stage. Reason (R) : The separation of daughter chromosomes is clearly seen by spindle formation.
Answer» Assertion is true and REASON is correct explanation of Assertion. Assertion and Reason is true but Reason is not correct explanation of Assertion. Assertion is true and Reason is FALSE. Both Assertion and Reason are false. ANSWER :C

Discussion

21525.	Question : Assertion A: In Pneumonia, burning is felt in alveolar wall which secrets the protein filled fluid. Reason R : The lungs do get enough oxygen in pneumonia.
Answer» Both A and R are TRUE and R is the CORRECT EXPLANATION of A. Both A and R are true and R is not the correct explanation of A. A is true and R is FALSE. A is false and R is true. Solution :Both A and R are true and R is the correct explanation of A.

Discussion

21526.	Question : Assertion .A.: In interspecific hybridization a superior male of any one species is mated with a female of other species. Reason .R.: The offspring show characters, quite different from those observed in the species of both parents
Answer» If A and R both are TRUE and R is correct explanation of A. If A and R both are true but R is not correct explanation of A. A is correct and R is WRONG. A is wrong and R is true Solution :A is wrong and R is true

Discussion

21527.	Question : Assertion (A): In forest ecosystem, the pyramid of number is spindle shaped. Reason (R): Tropical (T1) of the pyramid occupies large trees which are maximum in number
Answer» (a) Both A and R are wrong (B) A is RIGHT R is wrong (c) R EXPLAINS A (d) A is right R is not the correct explanation for A Answer :B

Discussion

21528.	Question : Assertion (A) : In Bryophyllum, vegetative propagation , occurs through leaf . Reason (R) : Epiphyllous buds are noticed in Bryophyllum.
Answer» A is correct R is INCORRECT . R explains A Both A and R are incorrect Both A and R are correct . R does not EXPLAIN R. Answer :B

Discussion

21529.	Question : Assertion (A): Hybrids show increased growth and elevated yield. Reason (R): F_(1) hybrids show Heterosis.
Answer» Both A and R are TRUE. R EXPLAINS A. A is true R is FALES A is fales R is true Both A and R is fales Answer :A

Discussion

21530.	Question : Assertion (A). Higher yield in case of bell pepper can be achieved by growing them in CO_(2) enriched green houses Reason (R). Due to higher intracellular CO_(2) concentration in bundle sheath cells, RuBisCO mainly acts as carboxylating enzyme
Answer» A is true but R is FALSE A is false but R is true Both A and R are true and R is correct xplanation of A Both A and R are true but R is not correct EXPLANATION of A. Answer :A

Discussion

21531.	Question : Assertion (A): Human ovum is non-cleidoic Reason (R): Human ovum does not contain yolk.
Answer» (a) R explains A. (B) A is RIGHT R is WRONG. (C) A and R are right. R does not explains A. (d) Both A and R are wrong. Solution :A and R are right. R does not explains A.

Discussion

21532.	Question : Assertion [A] : Heroine is also called smack. Reason [R] : Heroine is an opium alkaloid.
Answer» A is TRUE and R are true, it is CORRECT EXPLANATION of A. A and R are true but R is not the correct explanation of A. A is true but R is FALSE. A is false but R is true. Solution :A is true but R is false.

Discussion

21533.	Question : Assertion (A): Hardy - Weinberg principle states that allelic frequency of a population remain constant Reason (R): Constancy is maintained through natural selection and mutation
Answer» A is TURE R is FALSE A is false R is true Both a and R are true. R EXPLAINS A Solution :A is ture R is false

Discussion

21534.	Question : Assertion (A): Heterochromatin is transcriptionally active. Reason (R): Tightly packed chromatin which stains dark.
Answer» Both A and R are correct A is correct R is INCORRECT Rexplains A A is incorrect R is correct Solution :A is incorrect R is correct

Discussion

21535.	Question : Assertion (A) : Grading up is related to the polygenic cumulative genes . Reason (R) : Polygenic cumulative genes show qualitative inheritance .
Answer» Both A and R are CORRECT and R is the correct explanation of A Both A and R are correct but R is not the correct explanation of A A is true but R is false A is false and R is true ANSWER :C

Discussion

21536.	Question : Assertion (A) : Golden rice helps to overcome childhood blindness. Reason (R) : It is rich in beta carotene.
Answer» a) Both A and R are wrong . B) A is RIGHT R is wrong. C) R EXPLAINS A. d) A and R are right , R does not explain A. Answer :C

Discussion

21537.	Question : Assertion (A) : Genophore is noticed in prokaryotes. Reason (R): Bacteria possess circular DNA without chromatin organisation.
Answer» (a) Both A and R are correct (b) A is correct R is incorrect (C) R EXPLAINS A (d) A is incorrect R is correct Solution :R explains A

Discussion

21538.	Question : Assertion (A): Genetics is described as a science which deals with heredity. Reason (R ): Heredity is the transmission of characters from parents to offsprings.
Answer» Assertion is TRUE and REASON is correct EXPLANANTION of Assertion. Assertion and Reason is true but Reason is not correct EXPLANATION of Assertion. Assertion is true and Reason is false. Both Assertion and Reason are false. Solution :Assertion is true and Reason is correct explanantion of Assertion.

Discussion

21539.	Question : Assertion: A gene bank should not be regarded as a plant museum. Reason: The germplasms stored in the gene bank are actively utilised by breeders to develop novel varieties.
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

21540.	Question : Asserlion (A) : Gamma rays are generally use to induce mutation in wheat varieties. Reason (R) : Because they carry lower energy to non-ionize electrons from atom
Answer» A is CORRECT . R is correct EXPLANATION of A A is correct . R is not correct explanation of A A is correct . R is WRONG explanation of A A and R is wrong Answer :C

Discussion

21541.	Question : Assertion (A) : Fusion of male and female gametes results in zygotes. Reason (R) : Product of triple fusion is PEN.
Answer» A is CORRECT R is INCORRECT . R EXPLAINS A Both A and R are incorrect Both A and R are correct . R does not explain A. Answer :D

Discussion

21542.	Question : Assertion (A) : Expression vectors are suitable for expressing foreign proteins. Reason (R) : pBR 322 is an expression vectors.
Answer» Both A and R are wrong . A is RIGHT R is wrong. R EXPLAINS A. A and R are right , R does not explain A. Answer :D

Discussion

21543.	Question : Assertion (A): Evolution of Greenhouse gases leads to Global warming. Reason (R): The energy released by the greenhouse gases move away from the atmospheric surface
Answer» A is RIGHT R is WRONG A is wrong R is right Both A and R are correct R EXPLAINS A Solution :A is right R is wrong

Discussion

21544.	Question : Assertion: A drop in temperature does not affect spermatogensis. Reason: During temperature drop the smooth muscles contracts and bring the tests closer to the pelvic cavity.
Answer» Solution :The normal temperature of the testes in the scrotum is about `2^(@),2.5^(@)` LOWER than the internal BODY temperature when the body is chiled, the smooth muscle CONTRACTS and BRINGS the testes closer to the pelvic cavity. This movement TOWARDS thepelvic cavity allows the testes to absorb heat from the rest of teh body so that the sperm cells do not become chilled and get optimum temperature for spermatogenesis.

Discussion

21545.	Question : Assertion (A) : Endonuclease catalyeses the cleavage of DNA at internal position .Reason (R) : Endonulease is an enzyme produced by bacteria .
Answer» Both ASSERTION and REASON are TRUE and Reason is correct EXPLANATION of Assertion . Both Assertion and Reason are true and Reason is not correct explanation of Assertion . Both Assertion and Reason are true . Both Assertion and Reason are false . Solution :N/A

Discussion

21546.	Question : Assertion (A) : Emasculation is a process of removal of anther to prevent self pollination. Reason (R) : Anthesis is a period of opening of a flower.
Answer» Both Assertion and Reason are true and Reason is CORRECT EXPLANATION of Assertion . Both Assertion and Reason are true but reason is not correct explanation of Assertion Assertion is true , Reason is false. Both Assertion and Reason are false. Answer :A::C

Discussion

21547.	Question : Assertion (A) : DNA polymerase alpha synthesizes primers. Reason (R) : DNA polymerase requires a free 3' OH to initiate DNA synthesis.
Answer» Assertion is TRUE and Reason is CORRECT explanation of Assertion. Assertion and Reason is true but Reason is not correct explanation of Assertion. Assertion is true and Reason is false. Both Assertion and Reason are false. ANSWER :a

Discussion

21548.	Question : Assertion (A) : DMH - 11 is a transgenic mustard. Reason (R) : It is developed by using barnase/ barstar technology.
Answer» Both A and R are WRONG . A is RIGHT R is wrong. R explains A. A and R are right , R does not explain A. ANSWER :C

Discussion

21549.	Question : Assertion (A): Diapause is carried out to overcome abiotic stress. Reason (R): Animals become inactive during winter.
Answer» Both A and R are correct R EXPLAIN A A is correct R is incorrect R DOESNOT explain A Both A and R are incorrect Solution :A is correct R is incorrect

Discussion

21550.	Question : Assertion (A) : Development of root from callus is called caulogenesis. Reason (R ) : Caulogenesis is the final step of protoplasmic fusion.
Answer» Both A and R are correct but R is not a correct explanation to A R EXPLAINS A A is correct R is incorrect Both A and R are incorrect Answer :D

Discussion

Explore topic-wise InterviewSolutions in .

Question : Assertion (A): PCR is a amplification technique used in biotechnology. Reason (R): Using PCR multiple copies of DNA can be generated.

Question : Assertion (A): Ozone layer protects the UV rays entering the Earth. Reason (R): UV rays may cause melanoma.

Question : Assertion (A) : Ozone acts as a natural sun block.Reason (R ) : UV rays reaching the earth are deviated from earth.

Question : Assertion (A) : Outbreeding never involves breeding between individuals of same breed. Reason (R) : Outbreeding is carried out between individuals of different breeds or species .

Question : Assertion (A): Organisms show three phases in their life cycle. Reason (R): Juvenile phase is a degenerative phase.

Question : Assertion (A): Oparin used the term coacervasesReason (R) : Coacervates are colloidal particles in aqueous environment

Question : Assertion (A): Only one parent is required for natural vegetative propagation. Reason (R ): New individual plants produced are genetically identical.

Question : Assertion (A): On diagnosis. Ramu is reported to have under developed testis and gynaecomastia. Reason (R): His karyotype reveals XXY condition.

Question : Assertion [A] : MRI is the best method to detect tumors. Reason [R]: It does not involve radiation.

Question : Assertion (A): Monohybrid inheritance is the inheritance of a single character. Reason (R ) : It involves the inheritance of single allele of a single gene.

Question : Assertion (A): Movement of organism from one place to another and back is called migration. Reason (R): Eel is an example for aradromous migration

Question : Assertion (A) : Microspores are the first cell of male gametophyte. Reason (R) : Microspores undergo development and forms pollen grains.

Question : Assertion .A.: Lipase enzyme is produced through micro-organisms in industries.Reason .R.: Lipases are used in Fermentation

Question : Assertion (A): Menopause refers to the absence of menstruation during pregnancy. Reason (R): Ovulation occurs during menstrual phase.

Question : Assertion (A) : Liquid nitrogen is used in cryopreservation techniques. Reason (R ) : Gene bank DNA bank are the parts of germplasm conservation.

Question : Assertion (A) : IUD's are inserted inside the ovary. Reason (R ) : IUD's increases phagocytosis of sperms

Question : Assertion (A): It is advantageous to give the polio vaccines orally. Reason (R): It prevents reinfection by causing intestinal immunity.

Question : Assertion (A): Interferons are used to treat herpes zoster. Reason (R): Interferons are antiviral protein.

Question : Assertion (A) : Incubation is followed by Inoculation. Reason (R ) : Explant is inoculated to media.

Question : Assertion (A) : In zoological parks, the animals are maintained in their natural habitat. Reason (R ) : Ex - situ conservation refers to protecting species in their natural habitat.

Question : Assertion (A): In scrotum, the temperature is maintained 2 - 3^@C lower than body temperature. Reason (R): Reduced temperature results in efficient sperm production.

Question : Assertion (A) : In radiography experiment cells are arrested at metaphase stage. Reason (R) : The separation of daughter chromosomes is clearly seen by spindle formation.

Question : Assertion A: In Pneumonia, burning is felt in alveolar wall which secrets the protein filled fluid. Reason R : The lungs do get enough oxygen in pneumonia.

Question : Assertion .A.: In interspecific hybridization a superior male of any one species is mated with a female of other species. Reason .R.: The offspring show characters, quite different from those observed in the species of both parents

Question : Assertion (A): In forest ecosystem, the pyramid of number is spindle shaped. Reason (R): Tropical (T1) of the pyramid occupies large trees which are maximum in number

Question : Assertion (A) : In Bryophyllum, vegetative propagation , occurs through leaf . Reason (R) : Epiphyllous buds are noticed in Bryophyllum.

Question : Assertion (A): Hybrids show increased growth and elevated yield. Reason (R): F_(1) hybrids show Heterosis.

Question : Assertion (A). Higher yield in case of bell pepper can be achieved by growing them in CO_(2) enriched green houses Reason (R). Due to higher intracellular CO_(2) concentration in bundle sheath cells, RuBisCO mainly acts as carboxylating enzyme

Question : Assertion (A): Human ovum is non-cleidoic Reason (R): Human ovum does not contain yolk.

Question : Assertion [A] : Heroine is also called smack. Reason [R] : Heroine is an opium alkaloid.

Question : Assertion (A): Hardy - Weinberg principle states that allelic frequency of a population remain constant Reason (R): Constancy is maintained through natural selection and mutation

Question : Assertion (A): Heterochromatin is transcriptionally active. Reason (R): Tightly packed chromatin which stains dark.

Question : Assertion (A) : Grading up is related to the polygenic cumulative genes . Reason (R) : Polygenic cumulative genes show qualitative inheritance .

Question : Assertion (A) : Golden rice helps to overcome childhood blindness. Reason (R) : It is rich in beta carotene.

Question : Assertion (A) : Genophore is noticed in prokaryotes. Reason (R): Bacteria possess circular DNA without chromatin organisation.

Question : Assertion (A): Genetics is described as a science which deals with heredity. Reason (R ): Heredity is the transmission of characters from parents to offsprings.

Question : Assertion: A gene bank should not be regarded as a plant museum. Reason: The germplasms stored in the gene bank are actively utilised by breeders to develop novel varieties.

Question : Asserlion (A) : Gamma rays are generally use to induce mutation in wheat varieties. Reason (R) : Because they carry lower energy to non-ionize electrons from atom

Question : Assertion (A) : Fusion of male and female gametes results in zygotes. Reason (R) : Product of triple fusion is PEN.

Question : Assertion (A) : Expression vectors are suitable for expressing foreign proteins. Reason (R) : pBR 322 is an expression vectors.

Question : Assertion (A): Evolution of Greenhouse gases leads to Global warming. Reason (R): The energy released by the greenhouse gases move away from the atmospheric surface

Question : Assertion: A drop in temperature does not affect spermatogensis. Reason: During temperature drop the smooth muscles contracts and bring the tests closer to the pelvic cavity.

Question : Assertion (A) : Endonuclease catalyeses the cleavage of DNA at internal position .Reason (R) : Endonulease is an enzyme produced by bacteria .

Question : Assertion (A) : Emasculation is a process of removal of anther to prevent self pollination. Reason (R) : Anthesis is a period of opening of a flower.

Question : Assertion (A) : DNA polymerase alpha synthesizes primers. Reason (R) : DNA polymerase requires a free 3' OH to initiate DNA synthesis.

Question : Assertion (A) : DMH - 11 is a transgenic mustard. Reason (R) : It is developed by using barnase/ barstar technology.

Question : Assertion (A): Diapause is carried out to overcome abiotic stress. Reason (R): Animals become inactive during winter.

Question : Assertion (A) : Development of root from callus is called caulogenesis. Reason (R ) : Caulogenesis is the final step of protoplasmic fusion.