24277 + Interview Questions in Biology in Class 12 Page 1 InterviewSolution

1.	Question : Which is the most common mechanism of genetic variation in the population of a sexually reproducing organism?
Answer» Recombination Transduction Chromosomal aberrations Genetic drift Answer :A

Discussion

2.	Question : Which is the most common methods of fossilization? Explain how it occurs.
Answer» Solution :Actual remains -The original hard parts such as BONES, teeth or SHELLS are preserved as such in the Earth.s atmosphere. This is the most common method of fossilization. When marine animals die, their hard parts such as bones and shells, etc., are covered with sediments and are protected from further DETERIORATION. They get preserved as such as they are preserved in vast ocean, the salinity in them prevents decay. The sediments become hardened to form definite layers or strata. For EXAMPLE, Woolly Mammoth that lived 22 thousand years ago were preserved in the frozen coast of Siberia as such. Several human beings and animals living in the ancient city of Pompeii were preserved intact by volcanic ash which gushed out from Mount VESUVIUS

Discussion

3.	Question : Which is the most common mechanism of genetic variation in the population of a sexually reproducing organism ?
Answer» TRANSDUCTION CHROMOSOMAL ABERRATIONS GENETIC drift Recombination ANSWER :D

Discussion

4.	Question : Which is the microscopic parasitic animal ?
Answer» AMOEBA EUGLENA PLASMODIUM None Solution :Plasmodium

Discussion

5.	Question : Which is the method of temporary birth control that reduces the chances of pregnancy by 80%? Write the fact on which this method is based.
Answer» Solution :(1) Safe period or RHYTHM method is the method of temporary birth control that reduces the chances of pregnancy by 80%. (2) Fact on which this method is based : A week before and a week after menstrual bleeding is the period considered as safe, as during this time the chances of CONCEPTION are low. Ovulation occurs on 14th day of the cycle and then ovum SURVIVES only for two days. The sperms released can remain alive for only three days. Therefore, in this period the chance of alive ovum and sperm meeting will be very LESS. Hence this period is CALLED a safe period.

Discussion

6.	Question : Which is the main cause to convert water bodies into land ?
Answer» A. Eutrophication B. INCREASE BOD in water C. DUMPING of SILT and ORGANIC waste D.Growing up aquatic PLANTS in water Answer :C

Discussion

7.	Question : Which is the lowest level of ecological organisation ?
Answer» ANSWER :SPECIES

Discussion

8.	Question : Which is the longest cell of the human body ?
Answer» ANSWER :NERVE CELL

Discussion

9.	Question : Which is the longest bone of the body ?
Answer» ANSWER :FEMUR

Discussion

10.	Question : Which is the link between glycolysis and Krebs cycle·?
Answer» Glucose Cytochrome Acetyle-CoA Pyruvate Answer :C

Discussion

11.	Question : Which is the least important factor for germination of seeds in Angiosperms ?
Answer» Light Temperature Air Water Answer :A

Discussion

12.	Question : Which is the largest part of the human brain?
Answer» ANSWER :CEREBRUM

Discussion

13.	Question : Which is the largest nucleus in pollen grain?(A) gamete nucleus(B) vegetative nucleus(C) generative nucleus(D) primary covered nucleus
Answer» GAMETE nucleus vegetative nucleus generative nucleus primary COVERED nucleus Answer :B

Discussion

14.	Question : Which is the largest aquatic mammal among the following ?
Answer» RAT BAT DOLPHIN Dog Solution :Dolphin

Discussion

15.	Question : Which is the largest endocrine gland ?
Answer» THYROID gland Adrenal gland Thymus Pituitary gland Answer :A

Discussion

16.	Question : Which is the largest biome on Earth? Classify it.
Answer» Solution :Aquatic biome is the largest biome occupying 71% of biosphere.The aquatic biomes on EARTH are: a) Fresh water biome (LAKES and Ponds) b) Brackish water biome (Estuaries /Wetlands) c) Marine biome (Coral REEFS and abyssal zones)

Discussion

17.	Question : Which is the intermediate host of Hookworm ?
Answer» Snail Sand fly Mosquito None of the above Answer :D

Discussion

18.	Question : Which is the highest level of ecological organisation ?
Answer» ANSWER :BIOSPHERE

Discussion

19.	Question : Which is the initial stage of the sporophyte in sexually reproducing plants?
Answer» Solution :The DIPLOID zygote is the INITIAL STAGE of the sporophyte in SEXUALLY reproducing PLANTS.

Discussion

20.	Question : Which is the infective stage of Entamoeba histolytica ?
Answer» ANSWER :Quadrinucleate CYST

Discussion

21.	Question : Which is the group of green house gases ?
Answer» `O_(2),O_(3),CO_(2),CO` `NH_(3),NO_(2),NO_(3)` `CO_(2),CH_(4),NO_(2),CFC` `N,O_(2),CO_(2),H_(2)` Answer :C

Discussion

22.	Question : Which is the hardest substance in our body?
Answer» ANSWER :ENAMEL

Discussion

23.	Question : What is the gestation period for human?
Answer» ANSWER :280 DAYS(APPROX.)

Discussion

24.	Question : What is the fundamental packing unit of DNA ?
Answer» ANSWER :NUCLEOSOME

Discussion

25.	Question : Which is the fish eaught in South Africa in 1938, which was thought to be extinet?
Answer» SOLUTION :Coelocanth.

Discussion

26.	Question : Which is the following is most convincing reason for increasing population growth in a country ?
Answer» High BIRTH rate LOW MORTALITY rate Low POPULATION of YOUNG children High population of young children Answer :D

Discussion

27.	Question : Which is the first true man?
Answer» HOMO ERECTUS JAVA MAN Peking man All of these Solution :All of these

Discussion

28.	Question : The first synthetic vaccine produced was ___________ .
Answer» POLIO Vaccine HepatitisB Vaccine BCG Vaccine MMR Vaccine SOLUTION : Hepatitis B Vaccine

Discussion

29.	Question : Which is the first step of pinocytic reproduction ?
Answer» ViralRNApackagingand capsidassembly Viralproteinsynthesis RECEPTOR bindingand membranefusion Reservetranscription Answer :C

Discussion

30.	Question : The first stable compound of Krebs cycle is
Answer» Solution :Citric acid is the FIRST STABLE COMPOUND of KREBS cycle.

Discussion

31.	Question : Which is the first National Park in India ?
Answer» PANNA National Park Jim CORBETT National Park Kaziranga National Park Saputara National Park SOLUTION :Jim Corbett National Park

Discussion

32.	Question : The compoundsin which the carbon atoms are linked in a linear pattern to form the chain are known as ______.
Answer» Solution :(a) The first link of grazing FOOD CHAIN is plants (Producers). (b) The first link of detritus food chain is dead remains and excreta of plants and ANIMALS.

Discussion

33.	Question : Which is the first CO_(2) acceptor in C_(3) pathway?
Answer» Solution :RuBP is the first `CO_(2)` acceptor in `C_(3)` PATHWAY.

Discussion

34.	Question : Which is the female sex organ in a flower?
Answer» Pistil Stamen Carpel both 1 and 3 Answer :D

Discussion

35.	Question : Which is the fastest infectious disease ?
Answer» HEPATITIS - B AIDS COUGH and COLD Malaria SOLUTION :Cough and cold

Discussion

36.	Question : Which is the family planning method without any side effects and protected from STDs?
Answer» IUDS BARRIER METHOD HORMONAL method All of the given Answer :B

Discussion

37.	Question : Which is the example of bio-piracy ?
Answer» TRANSGENIC COW Brasica Basmati RICE Transgenicmice/rat Solution :Brasica

Discussion

38.	Question : Which is the diversity for the forest's biodiversity ?
Answer» `ALPHA`-DIVERSITY `BETA`-diversity `GAMMA`-diversity All above SOLUTION :`gamma`-diversity

Discussion

39.	Question : Which is the earliest fossil of prehistoric man?
Answer» SOLUTION :RAMAPITHECUS, SIVAPITHECUS

Discussion

40.	Question : Which is the cytoplasmic factor that is responsible for the cell to enter from G_2 phase M phase?
Answer» ANSWER :MPF

Discussion

41.	Question : Which is the correct sequence to obtain new genetic variety/diversity. (1) Collection of variability. (2) Testing, release and commercialization of new cultivation. (3) Cross hybridization among the selected parents (4) Evalution and selection of parents. (5) Selection and testing of superior recombinants
Answer» 1,3,4,2,5 1,5,4,3,2 5,4,3,1,2 1,4,3,5,2 Solution :1,4,3,5,2

Discussion

42.	Question : Which is the correct statement ?(A) During the sewage treatment also, biogas is produced and it is useful as fuel energy.(B) In biogas plant, in decaying medium, the fungus grows(C) Through biogas fuel energy is obtained but fertilizer is not obtained.(D) Fermentation process of microorganisms useful to make protein & fact
Answer» During the sewage treatment also, biogas is produced and it is useful as fuel ENERGY. In biogas plant, in decaying medium, the fungus grows Through biogas fuel energy is obtained but fertilizer is not obtained. Fermatation PROCESS of MICROORGANISMS useful to MAKE protein & fact Solution :During the sewage treatment also, biogas is produced and it is useful as fuel energy.

Discussion

43.	Question : Which is the correct sequence of events leading to the formation of mature sperm?
Answer» Germ CELLS `rarr` Vas deferens `rarr` EPIDIDYMIS `rarr` VASA efferentia `rarr` BULBOURETHRAL gland `rarr` Urino-genital passage `rarr` Glans penis Germ cells `rarr` Vas deferens `rarr` Epididymis `rarr` Vasa efferentia `rarr` Urino-genital passage `rarr` Bulbourethral gland `rarr` Glans penis Germ cells `rarr` Vas deferens `rarr` Epididymis `rarr` Vasa efferentia `rarr` Ureter `rarr` Ejaculatory duct `rarr` Bulbourethral gland gland `rarr` Glans penis None of these Answer :C

Discussion

44.	Question : Which is the correct sequence of ancestors in the path ofprimates evolution?
Answer» Crossopterygian `to` Cotylosaur `to` Therapsid `to` Labyrinthodont `to` Insectivors `to` PRIMATES Labyrinthodont `to` Cotylosaur `to` Therapsid `to` Crossopterygian `to` Insectivors `to` Primates Crossopterygian `to` Labyrinthodont `to` Cotylosaur `to` Therapsid `to` Insectivors `to` Primates Crossopterygian `to` Therapsid `to` Cotylosaur `to` Labyrinthodont `to` Insectivors `to` Primates Solution :Crossopterygian `to` Labyrinthodont `to` Cotylosaur `to` Therapsid `to` Insectivors `to` Primates

Discussion

45.	Question : Which is the correct sequenc e in spermatogenesis?
Answer» SPERMATOGONIA `rarr` SPERMATIDS `rarr` Secondary spermatocytes `rarr` Primary spermatocytes `rarr` Sperms Spermatogonia `rarr` Spermatids `rarr` Primary spermatocytes `rarr` Secondary spermatocytes `rarr` Sperms Primary spermatocytes `rarr` Secondary spermatocytes `rarr` spermatids `rarr` Spermatogonia `rarr` Sperms Spermatogonia `rarr` primary spermatocytes `rarr` Secondary spermatocytes `rarr` Spermatids `rarr` Spers. ANSWER :D

Discussion

46.	Question : Which is the correct sequence based on increasing molecular weight?
Answer» RNA-DNA-rRNA RNA-rRNA-DNA rRNA-DNA-RNA DNAS-tRNA-rRNA Answer :B

Discussion

47.	Question : Which is the correct options for the statements given for the endometrial layer of uterine wall? Statements :
Answer» If the women does not conceive it sloughts off after 28 days It is OUTER layer of uterus Fertilized ovum is IMPLANTED here It is middle layer of uterus Answer :B

Discussion

48.	Question : Which is the correct arrangement of types of WBCs with respect to their number in blood ? (Consider Neutrophil = N, Eosinophil = E, Basophil = B, Monocyte = M and Lymphocyte = L)
Answer» NLMEB BEMLN NEBLM MEBLN Answer :A

Discussion

49.	Question : Which is the correct order of increasing geological time scale for a hypotehtical vertebrate evolution?
Answer» CENOZOIC, MESOZOIC, PALEOZOIC, Proterozoic Cenozoic, PALAEOZOIC, Mesozoic, Proterozoic Proterozoic, Cenozoic, Palaeozoic, Mesozoic Proterozoic, Palaezoic,Mesozoic,Cenozoic Solution :N//A

Discussion

50.	Question : Which is the correct order in which the protiens participate in clotting of blood ?
Answer» PROTHROMBINASE `to` PROTHROMBIN `to` THROMBOPLASTIN `to` THROMBIN Thromboplastin `to` Prothrombinase `to` Prothrombin `to` Thrombin Prothrombin `to` Thromboplastin `to` Thrombin `to` Prothrombinase Thrombin `to` Prothrombin `to` Thrombo-plastin `to` Prothrombinase Answer :B

Discussion

Explore topic-wise InterviewSolutions in .

Question : Which is the most common mechanism of genetic variation in the population of a sexually reproducing organism?

Question : Which is the most common methods of fossilization? Explain how it occurs.

Question : Which is the most common mechanism of genetic variation in the population of a sexually reproducing organism ?

Question : Which is the microscopic parasitic animal ?

Question : Which is the method of temporary birth control that reduces the chances of pregnancy by 80%? Write the fact on which this method is based.

Question : Which is the main cause to convert water bodies into land ?

Question : Which is the lowest level of ecological organisation ?

Question : Which is the longest cell of the human body ?

Question : Which is the longest bone of the body ?

Question : Which is the link between glycolysis and Krebs cycle·?

Question : Which is the least important factor for germination of seeds in Angiosperms ?

Question : Which is the largest part of the human brain?

Question : Which is the largest nucleus in pollen grain?(A) gamete nucleus(B) vegetative nucleus(C) generative nucleus(D) primary covered nucleus

Question : Which is the largest aquatic mammal among the following ?

Question : Which is the largest endocrine gland ?

Question : Which is the largest biome on Earth? Classify it.

Question : Which is the intermediate host of Hookworm ?

Question : Which is the highest level of ecological organisation ?

Question : Which is the initial stage of the sporophyte in sexually reproducing plants?

Question : Which is the infective stage of Entamoeba histolytica ?

Question : Which is the group of green house gases ?

Question : Which is the hardest substance in our body?

Question : What is the gestation period for human?

Question : What is the fundamental packing unit of DNA ?

Question : Which is the fish eaught in South Africa in 1938, which was thought to be extinet?

Question : Which is the following is most convincing reason for increasing population growth in a country ?

Question : Which is the first true man?

Question : The first synthetic vaccine produced was ___________ .

Question : Which is the first step of pinocytic reproduction ?

Question : The first stable compound of Krebs cycle is

Question : Which is the first National Park in India ?

Question : The compoundsin which the carbon atoms are linked in a linear pattern to form the chain are known as ______.

Question : Which is the first CO_(2) acceptor in C_(3) pathway?

Question : Which is the female sex organ in a flower?

Question : Which is the fastest infectious disease ?

Question : Which is the family planning method without any side effects and protected from STDs?

Question : Which is the example of bio-piracy ?

Question : Which is the diversity for the forest's biodiversity ?

Question : Which is the earliest fossil of prehistoric man?

Question : Which is the cytoplasmic factor that is responsible for the cell to enter from G_2 phase M phase?

Question : Which is the correct sequence of events leading to the formation of mature sperm?

Question : Which is the correct sequence of ancestors in the path ofprimates evolution?

Question : Which is the correct sequenc e in spermatogenesis?

Question : Which is the correct sequence based on increasing molecular weight?

Question : Which is the correct options for the statements given for the endometrial layer of uterine wall? Statements :

Question : Which is the correct arrangement of types of WBCs with respect to their number in blood ? (Consider Neutrophil = N, Eosinophil = E, Basophil = B, Monocyte = M and Lymphocyte = L)

Question : Which is the correct order of increasing geological time scale for a hypotehtical vertebrate evolution?

Question : Which is the correct order in which the protiens participate in clotting of blood ?