24277 + Interview Questions in Biology in Class 12

1.	Question : AXX sperms are formed due to
Answer» PRIMARY non-DISJUNCTION of allosomes Secondary non-disjunctionof allosomes Secondary non-disjunction of Autosomes Secondary disjunction of allosomes Answer :B

Discussion

2.	Question : Axolotl larva shows: i. Neoteny and paedogenesis ii. Absence of thyroid affects metamorphosis iii. It is hemichordate
Answer» iii CORRECT II, and iii correct I and ii correct I, ii NAD iii correct ANSWER :C

Discussion

3.	Question : Axolost undergoes metamphosis as soon as
Answer» sex ORGANS develop food becomes plenty it is EXPOSED to air both B and C Answer :c

Discussion

4.	Question : Axis between corolla and androecium is
Answer» ANTHOPHORE GYNOPHORE Gynandrophore Androphore Answer :D

Discussion

5.	Question : Avery, Mc carty and MacLeod scientists supported which scientist's experiment ?
Answer» Mendel Wilkinson GRIFFITH Ervin SOLUTION :Griffith

Discussion

6.	Question : Average ratio of men and women in human population is
Answer» `3:4` `1:1` `3:5` `1:2` ANSWER :B

Discussion

7.	Question : Average human consumption of oxygen per day is _________.
Answer» 280 L 550 L 620 L 730 L Solution : 550 L

Discussion

8.	Question : Avena curvature test is a bioassay for examining the activity of:
Answer» Auxins Gibberellins Cytokinins Ethylene Answer :A

Discussion

9.	Question : AV bundle/Bundle of HIS is located in
Answer» ATRIOVENTRICULAR septum inter ATRIAL septum interventricular septum the WALLS of RIGHT atrium Answer :C

Discussion

10.	Question : What is called AV node?
Answer» SOLUTION :ATRIOVENTRICULAR

Discussion

11.	Question : Auxotroph is
Answer» organism CAPABLE of growing on MINIMAL medium capable of manufacturing all complex food materials PRIMITIVE AUTOTROPHIC organisms nutritional mutant Answer :D

Discussion

12.	Question : Auxins originates at the tip of the stem and controls growth elsewhere. The movement of auxin is largely:
Answer» Basipetal Acropetal Acropetal and basipetal None of these Answer :A

Discussion

13.	Question : Auxin causes cells to absorb water from hypertonic medium because
Answer» It LOWER transpiration RATE It raises rate of cellular respiration for PROVIDING ATP for active water absorption It increases solute potential of cells It increases rate of transpiration Answer :B

Discussion

14.	Question : Auxanometer is used to measure plant organ
Answer» GROWTH in length Growth in breadth Pest population Both A and B. Answer :A

Discussion

15.	Question : Auxin are synthesized at_____
Answer» ANSWER :APICAL MERISTEM

Discussion

16.	Question : Auxanometer is used for the measurement of
Answer» ATMOSPHERIC pressure Rate of Transpiration Blood SUGAR level Plant growth Answer :D

Discussion

17.	Question : Autumn colouration of leaves appear only in-
Answer» Tropical REGIONS evergreen plants temperate deciducus plants deserts. ANSWER :C

Discussion

18.	Question : Autonomously replicating circular extra-chromosomal DNA of salmonella typhimurium.
Answer» SOLUTION :PLASMID.

Discussion

19.	Question : Autonomic Nervous System is semi-independent in function. Justify.
Answer» Solution :AUTONOMOUS nervous system WORKS in response to internal receptors in the VITAL organs and not under our will. Since it is involuntary in nature, it is called semi-independent in FUNCTION.

Discussion

20.	Question : Automobile are the largest source of _______pollution in caties.
Answer» ANSWER :A

Discussion

21.	Question : Automobile exhaust gas that causes major respiratory problem is :
Answer» CO `CH_4` `NO_2` Chlorine Answer :A

Discussion

22.	Question : Autoimmunity is a misdirected immune response. Justify.
Answer» Solution :Autoimmune DISEASES:Autoimunity is due to an abnormal immune response in which the immune system fails to properly distinguish between self and non-self and non-self and attacks its own body.Our body produces antibodies (AUTO antibodies) and cytotoxic T CELLS that DESTROY our own tissues.If a disease-state results,it is refferred to as auto-immune disease.Thus,autoimmunity is a misdirected immune response.

Discussion

23.	Question : Automated DNA sequences are developed by………………
Answer» SOLUTION :FREDERICK SANGER

Discussion

24.	Question : Autoimmune endocrine disorder are
Answer» EXOPHTHALMOS & simple goiter Grave's DISEASE & Addision's disease Addison's syndrome & cushings syndrone Graves disease & tentany Answer :B

Discussion

25.	Question : Autoimmune diseases are different from immune deficiency diseases.
Answer» Solution :Because AUTO immune diseases are due to STATE in which body.s immune system starts attacking the self cells and leads DAMAGE to the body E.g , RHEUMATOID arthritis. In case of immune deficiency diseases, the immune system of the body WEAKENS and it leads to recurrence of infections and inability to heal injuries . Eg, AIDS.

Discussion

26.	Question : Autogenic succession - Biotic factors (b) Allogenic succession - Abiotic factors (c) Autotrophic succession - Bacteria fungi (d) Heterotrophic succession - Organic habitats
Answer» ANSWER :AUTOTROPHIC SUCCESSION - BACTERIA FUNGI

Discussion

27.	Question : Autogamymeans(A) pollination of a flower by its own pollen(B) pollination of a flower by different of same species(C) pollination of a flower by different pollen of different species(D) Pollen of a flower pollinate any other flower present on same plant
Answer» pollination of a FLOWER by its own pollen pollination of a flower by DIFFERENT of same species pollination of a flower by different pollen of different species Pollen of a flower pollinate any other flower present on same plant Answer :A

Discussion

28.	Question : Autogamy is possible in(A) only monoecious flower(B) only in bisexual flower(C) both monoecious and bisexual flower(D) none of these
Answer» only MONOECIOUS flower only in BISEXUAL flower both monoecious and bisexual flower none of these Answer :B

Discussion

29.	Question : Autogamy geitonogamy and xenogamy are the three types of pollination based on the source of pollen. You have a monoecious and dioecious plant in your garden . Which among the above said pollination do not occur in each plant ?
Answer» SOLUTION :MONOECIOUS - AUTOGAMY DIOECIOUS - Autogamy and GEITONOGAMY

Discussion

30.	Question : Autogamy is observed in members of….(A) apiaceae(B) lamiaceae(C) cactaceae(D) all the above
Answer» apiaceae lamiaceae cactaceae all the above Answer :D

Discussion

31.	Question : Autogamy can occur in a chasmogamous flower if (A) Pollen matures before maturity of ovule(B) Ovules mature before maturity of pollen(C) Both pollen and ovules mature simultaneously(D) Both anther and stigma are of equal lengths
Answer» Pollen MATURES before maturity of ovule Ovules MATURE before maturity of pollen Both pollen and ovules mature simultaneously Both ANTHER and stigma are of equal lengths Solution :Self FERTILISATION is a type of Autogamy in which anther of a FLOWER receives pollen grain from the anther of the same flower. For autogamy both reproductive organs of chasmogamous flowers must mature at the sometime. Such chasmogamous flowers open at young age and pollen grains of released anther comes nearer for the process of self fertilisation. Both pollen grain and stigma because mature at the same age. In such flowers the length of anther and stigma play second part in autogamy. The second possibility of cross pollination increases when pollen matures early and anther matures early.

Discussion

32.	Question : Autogamy can occur in a chasmogamous flower if
Answer» POLLEN MATURES before maturity of ovule Ovules mature before maturity of pollen Both pollen and ovules mature simultaneously Both anther and STIGMA are of EQUAL lengths Answer :C

Discussion

33.	Question : Autecology deals with the study of ……………….
Answer» Community Population INDIVIDUAL SPECIES Niche of species Solution :Individual species

Discussion

34.	Question : Australopithecus s described as a man with ape brain.
Answer» SOLUTION :(1) Australopithecus can be considered as a connecting link between ape and man due to the following ape-like and man-like CHARACTERISTICS shown by it : (2) The ape-like characteristics of Australopithecus : (i) the jaws and teeth were large than those of modern man. (ii) The face was PROGNATHOUS, i.e. it had a muzzle like SLOPE. (iii) The chin was absent. (iv) The eye-brow ridges projected over the eyes. (v) Their CRANIAL capacity ranged from 450-600 c.c. (3) The man-like characteristics of Australopithecus : (i) Australopithecus was about four feet in hight. (ii) It walked nearly or completely straight due to erect posture. (iii) The vertebral column had a distinct lumbar curve with broad basin-like pelvic girdle. (iv) Dentition was man-like with the smoothly rounded parabolic dental arch. (v) A simian gap was absent. (vi) Australopithecus is, therefore, rightly described as a man with ape brain.

Discussion

35.	Question : Austro white is the hybrid of
Answer» gllus with white leghorn australop MALE and white HORN femlae desi VARITY with exotic bird none of the above Answer :A

Discussion

36.	Question : Autecology is the
Answer» Relation of HETEROGENOUS populations to its environment Relation of an individual to its environment Relation of a COMMUNITY to its environment Relation of a BIOME to its environment SOLUTION :Autecology is the relation of an individual to its environment.

Discussion

37.	Question : Australia is the home to a great diversity of pouched mammals.What is adaptive radiation?
Answer» SOLUTION :The PROCESS of EVOLUTION DUE to ADAPTATION

Discussion

38.	Question : Augustus Weismann conducted decaudali sation experiments on rat and disproved
Answer» LAMARCKISM and theory of panspermia Lamarckism and germplasm theory Lamarckism and abiogenesis theory Lamarckism and biogenesis theory Answer :C

Discussion

39.	Question : Australia is the home to a great diversity of pouched mammals.Name two marsupials in Australia.
Answer» SOLUTION :KANGAROO,MARSUPIAL RAT

Discussion

40.	Question : August Weismann
Answer» SOLUTION :OFFERED greatest opposition to lamarck theory of inheritance of acquired CHARACTERS and put FORWARD this theory of continuity of gamplasm in 1892.

Discussion

41.	Question : AUG is Known as the initiator codons. Write the 3 terminator codons
Answer» SOLUTION :UAA, UGA, UAG

Discussion

42.	Question : AUG is Known as the initiator codons. Give reason
Answer» SOLUTION :AUG codes for methionine which is the first aminoacid in all PROTEINS, so it is known as INITIATOR CODON

Discussion

43.	Question :AUG is known as the initiation codon. Give reason
Answer» SOLUTION :Because AUG INITIATES the SYNTHESIS of PROTEIN

Discussion

44.	Question : AUG GAC CUG AUA UUU UGA is the base sequence in a strand of m-RNA. (i) Write the base sequence of the DNA strand from which it has been transcribed. (ii) Upon translation, how many amino acids will be the resulting peptide have?
Answer» Solution :(i) Base sequence on DNA will be: TAC CTG GAC TAT AAA ACT (II) Five amino acids

Discussion

45.	Question : AUG is known as the initiation codon and UAA, UAG and UGA are knownas termination codons. Then what are non-sense codons?
Answer» SOLUTION :UAA, UAG and UGA, the stop codons do not specify any aminoacid. So they are ALSO KNOWN as non-sense codons.

Discussion

46.	Question : AUG code is for ………………..
Answer» Arginine Tyrosine Tryptophan METHIONINE Solution :Methionine

Discussion

47.	Question : AUG codes for :
Answer» VALINE HISTIDINE PHENYL ALANINE Methionine Answer :D

Discussion

48.	Question : Auditory area is present in the
Answer» OCCIPITAL lobe Parietal lobe Frontal lobe Temporal lobe Answer :D

Discussion

49.	Question : Attraction of water molecules to polar surface is known as:
Answer» Cohesion Capillarity surface tension Adhesion

Discussion

50.	Question : Attractants and rewards are required for ..........
Answer» a) ANEMOPHILY B) Entamophily C) MALACOPHILY d) Cheiroptrophily ANSWER :B

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Question : AXX sperms are formed due to

Question : Axolotl larva shows: i. Neoteny and paedogenesis ii. Absence of thyroid affects metamorphosis iii. It is hemichordate

Question : Axolost undergoes metamphosis as soon as

Question : Axis between corolla and androecium is

Question : Avery, Mc carty and MacLeod scientists supported which scientist's experiment ?

Question : Average ratio of men and women in human population is

Question : Average human consumption of oxygen per day is _________.

Question : Avena curvature test is a bioassay for examining the activity of:

Question : AV bundle/Bundle of HIS is located in

Question : What is called AV node?

Question : Auxotroph is

Question : Auxins originates at the tip of the stem and controls growth elsewhere. The movement of auxin is largely:

Question : Auxin causes cells to absorb water from hypertonic medium because

Question : Auxanometer is used to measure plant organ

Question : Auxin are synthesized at_____

Question : Auxanometer is used for the measurement of

Question : Autumn colouration of leaves appear only in-

Question : Autonomously replicating circular extra-chromosomal DNA of salmonella typhimurium.

Question : Autonomic Nervous System is semi-independent in function. Justify.

Question : Automobile are the largest source of _______pollution in caties.

Question : Automobile exhaust gas that causes major respiratory problem is :

Question : Autoimmunity is a misdirected immune response. Justify.

Question : Automated DNA sequences are developed by………………

Question : Autoimmune endocrine disorder are

Question : Autoimmune diseases are different from immune deficiency diseases.

Question : Autogenic succession - Biotic factors (b) Allogenic succession - Abiotic factors (c) Autotrophic succession - Bacteria fungi (d) Heterotrophic succession - Organic habitats

Question : Autogamymeans(A) pollination of a flower by its own pollen(B) pollination of a flower by different of same species(C) pollination of a flower by different pollen of different species(D) Pollen of a flower pollinate any other flower present on same plant

Question : Autogamy is possible in(A) only monoecious flower(B) only in bisexual flower(C) both monoecious and bisexual flower(D) none of these

Question : Autogamy geitonogamy and xenogamy are the three types of pollination based on the source of pollen. You have a monoecious and dioecious plant in your garden . Which among the above said pollination do not occur in each plant ?

Question : Autogamy is observed in members of….(A) apiaceae(B) lamiaceae(C) cactaceae(D) all the above

Question : Autogamy can occur in a chasmogamous flower if (A) Pollen matures before maturity of ovule(B) Ovules mature before maturity of pollen(C) Both pollen and ovules mature simultaneously(D) Both anther and stigma are of equal lengths

Question : Autogamy can occur in a chasmogamous flower if

Question : Autecology deals with the study of ……………….

Question : Australopithecus s described as a man with ape brain.

Question : Austro white is the hybrid of

Question : Autecology is the

Question : Australia is the home to a great diversity of pouched mammals.What is adaptive radiation?

Question : Augustus Weismann conducted decaudali sation experiments on rat and disproved

Question : Australia is the home to a great diversity of pouched mammals.Name two marsupials in Australia.

Question : August Weismann

Question : AUG is Known as the initiator codons. Write the 3 terminator codons

Question : AUG is Known as the initiator codons. Give reason

Question :AUG is known as the initiation codon. Give reason

Question : AUG GAC CUG AUA UUU UGA is the base sequence in a strand of m-RNA. (i) Write the base sequence of the DNA strand from which it has been transcribed. (ii) Upon translation, how many amino acids will be the resulting peptide have?

Question : AUG is known as the initiation codon and UAA, UAG and UGA are knownas termination codons. Then what are non-sense codons?

Question : AUG code is for ………………..

Question : AUG codes for :

Question : Auditory area is present in the

Question : Attraction of water molecules to polar surface is known as:

Question : Attractants and rewards are required for ..........