24277 + Interview Questions in Biology in Class 12 Page 301 InterviewSolution

15001.	Question : In which animals menstrual cycle occurs?
Answer» ANSWER :PRIMATES

Discussion

15002.	Question : In which animal nerve cell is present but brain is absent?
Answer» SPONGE EARTHWORM COCKROACH HYDRA ANSWER :D

Discussion

15003.	Question : In which animal both intracellular and intercellular digestion occurs
Answer» HYDRA EARTHWORM NEMATODE PARAMECIUM ANSWER :A

Discussion

15004.	Question :In which age group more cases of STDs are seen?
Answer» 15 - 24 YEARS 20-24 years 25-29 years 30-35 years ANSWER :A

Discussion

15005.	Question : In wheat (monocot)
Answer» Primary root is short lived Primary root replaced by fibrous root Fibrous root ARISES from the base of stem 1, 2 and 3 Answer :D

Discussion

15006.	Question : In what ways does the interior surface of the membrane of a resting neuron differ from the external surface :-
Answer» NEGATIVELY CHARGED with LESS sodium Negatively charged with more sodium Positively charged with less sodium Positively charged with more sodium Answer :A

Discussion

15007.	Question : In what ways the coacervates were inferior to eobionts ?
Answer» Solution :Coacervates lacked complex MOLECULAR ORGANIZATION, ENZYMES , electron transport chain, and PRECISE control of nucleic ACIDS

Discussion

15008.	Question : In what ways do the predators species get benefit from their prey?
Answer» Solution :Without PREDATION, the prey population may CROSS the carrying capacity of the environment and FACE death DUE to starvation.

Discussion

15009.	Question : In what way, India achieved overall improvement in reproductive healt ?
Answer» Solution :Reduced maternal and INFANT mortality RATES, early detection and cure of STDS, assistance to infertile couples ETC. have improved the reproductive health in our COUNTRY.

Discussion

15010.	Question : In what way Peyang conserved the forests?
Answer» Solution :The .Forest man of India, Jadav Payeng who created 1,360 acres of dense and defiant forest was born in Arunasapori (a river island on the BRAHMAPUTRA). He had just COMPLETED his Class X exams in 1979 when he started to sow the seeds and shoots on the eroded island covered with sand and silt. Thirty-six years later he had converted the once unproductive land into a forest. Payeng.s forest is now home to five Royal Bengal tigers, over a hundred deer, wild boar, vultures, and several species of birds. For his remarkable initiative, the Jawaharlal Nehru University invited Payeng in 2012 on Earth Day and honoured him with the title of the Forest Man of India..

Discussion

15011.	Question : In what way have microbes played a major role in controlling disease caused by harmful bacteria ?
Answer» Solution :Microbes PLAY a MAJOR role in the PRODUCED of antibiotics.

Discussion

15012.	Question :In what way anaerobic sludge digestion is important in sewage treatments ?
Answer» Solution : Once the BOD of sewage or waste water is reduced significantly, the effluent is then passed into a settling TANK where the bacterial .flocs. are allowed to sediment. This sediment is CALLED activated sludge. A small part of the activated sludge is pumped back into the aeration tank to serve as the inoculum. The remaining major part of the sludge is pumped into large tanks called anaerobic sludge digesters. Here, other kinds of bacteria, which grow ANAEROBICALLY, digest the bacteria and the fungi in the sludge. During this digestion, bacteria produce a mixture of gases such as methane, hydrogen sulphide and carbon dioxide. These gases form BIOGAS and can be used as a source of energy as it is inflammable.

Discussion

15013.	Question : In what type of species interaction Species-A is benefited and Species-B is unaffected?
Answer» ANSWER :COMMENSALISM

Discussion

15014.	Question : In what type of species interaction Species-A is benefited and Species-B is harmed ?
Answer» ANSWER :PARASITISM

Discussion

15015.	Question : In what type of species interaction Species-A and Species-B is neither benefited norharmed ?
Answer» ANSWER :NEUTRALISM

Discussion

15016.	Question : In what type of reproduction male and female gametes are involved ?
Answer» ANSWER :SEXUAL

Discussion

15017.	Question : In what type of ecological interaction both partners are benefited ?
Answer» ANSWER :MUTUALISM

Discussion

15018.	Question : In What respect, the heterotroph hypothesis differs from the early ideas of spontaneous generation?
Answer» It assumed that spontaneous generation was a continuous precess that could happen even TODY The idea of spontaneous generation maintained that complex organisms could ARISE suddenly from none -living MATTER The heterotroph hypothesis assumes that a very simple organism evolved slowly from non-living matter and this occurred in the primitive ENVIRONMENTAL conditions In all of the above conditions Answer :D

Discussion

15019.	Question : In what precell is differentiated with passes of time ?
Answer» TISSUE ORGAN CELL System Solution :Cell

Discussion

15020.	Question : In western Ghats has how many endemic vertebrates among total vertebrates species 32678 in the world ?
Answer» 130 310 313 133 Solution :310

Discussion

15021.	Question : In what duration are cardiac cycle is completed?
Answer» ANSWER :0.8 SECOND

Discussion

15022.	Question : In watermelon, the allele for green colour (G) is dominant over the allele for striped colour (g) and the allele for short shape (S) is dominant over the allele for long shape (s) . When long, striped watermelons are crossed with watermelons heterozygous for both traits, what proportion of the offspring are striped and short
Answer» 0 1/4 1/2 9/16 Answer :B

Discussion

15023.	Question : In Western blotting proteins are labelled with
Answer» ANTIBODIES LECTINS PROBES Both (a) and (B) ANSWER :d

Discussion

15024.	Question : In Vorticella during binary fission plane of division passes along
Answer» Any PLANE of organism TRANSVERSE AXIS of organism Longitudinal axis of body At an ANGLE to transverse axis of body Answer :C

Discussion

15025.	Question : In Vivipary, how the developing embryoes are nourished?
Answer» Solution :In Vivipary, the EMBRYO develops INSIDE the womb of females BODY, HENCE they are NOURISHED by the mother through palacenta.

Discussion

15026.	Question : In vitro fertilisation is a technique that involves transfer of which one of the following into the fallopian tube ?
Answer» ZYGOTE only Embryo only upto 8 cell stage Either zygote or early embryo upto 8 cell stage Embryo of 32 cell stage Answer :C

Discussion

15027.	Question : In vitro clonal propagation in plants is characterized by:
Answer» PCR and RAPD Northern blotting Electrophoresis and HPLC Microscopy Answer :A

Discussion

15028.	Question : In vitro clonal propagation in plants is characterised by
Answer» PCR and RAPD Northern blotting electrophoresis and HPLC MICROSCOPY SOLUTION :PCR and RAPD

Discussion

15029.	Question :In virus infected plants the meristematic tissues in both apical and axillary buds are free of virus because
Answer» The dividing cells are VIRUS resistant Meristems have ANTIVIRAL compounds The CELL division of meristems are faster than the rate of viral multiplication Viruses cannot multiply within meristem cell(s). Solution : In virus INFECTED plants the meristematic tissues in both APICAL and axillary buds are free of virus because the cell division of meristems are faster than the rate of viral multiplication.

Discussion

15030.	Question : In view of the current food crisis, it is said, that we need another green revolution. Highlight the major limitations of the earlier green revolution.
Answer» Solution :Limitations of green revolution : (i) The Green Revolution succeeded increases the food supply but, yet it was not enough to feed the GROWING human population. (ii) Incrcased yields have partly been due to the use of improved crop varieties, but mainly due to the use of better management practices and use of agrochemicals (fertilisers and pesticides). (iii) HOWEVER, for farmers in the developing world, agrochemicals are often too expensive, and further increases in yield with existing varieties are not possible using conventional breeding. (iv) Use of agrochemicals causes EUTROPHICATION in aquatic ecosystems and biomagnification in terrestrial ecosystems. (v) Water logging and SOIL salinity are some of the problems that have COME in the wake of green revolution

Discussion

15031.	Question :In view of the current food crisis, it is said, that we need another green revolution. Highlight the major limitations of the earlier green revolution.
Answer» SOLUTION : Limitations of Earlier GREEN Revolution (a) Limited availability of improved crop varieties, (b) Lack of better management practices (c) Use of agrochemicals (fertilisers and pesticides) (d) Deterioration of soil FERTILITY, contamination of food and water with agro-chemicals.

Discussion

15032.	Question : In view of importance of genetic research, the genome of this plant is analysed
Answer» LATHYRUS oderatus Pisum sativum Arabedopsis Mimosa Answer :C

Discussion

15033.	Question : In vexillary aestivation, largest petal, two smaller lateral petals and two smallest anterior petals are referred as _____, _____ and _____, respectively.
Answer» WINGS, KEEL, STANDARD Standard, wings, keel Standard, keel, wings Keel, standard, wings Answer :B

Discussion

15034.	Question : In vexillary aestivation, keel represents
Answer» The LARGEST posterior petal Two SMALLER lateral petals Two SMALLEST ANTERIOR petals The largest anterior petal Answer :D

Discussion

15035.	Question : In vertebrates, the ultimate source of ATP for muscle contraction is from______.
Answer» Phosphoarginine Phosphocreatine Tropomyosin Troponin Answer :B

Discussion

15036.	Question : In unit area which stored polysachharide porvides maximum energy?
Answer» starch LIPIDS GLYCOGEN CELLULOSE ANSWER :C

Discussion

15037.	Question : In vegetative propagation, characters of parent plants are:ChangedNot preservedPreservedExchanged
Answer» CHANGED Not preserved Preserved Exchanged Answer :A

Discussion

15038.	Question : In vegetative propagation ,characters of plants are:
Answer» CHANGED Not PRESERVED Preserved Exchanged Answer :C

Discussion

15039.	Question : In unit area which stored polysaccharide provides maximum energy ?
Answer» STARCH LIPIDS Glycogen Cellulose Answer :C

Discussion

15040.	Question : In unilocular overy the ovules develop on the inner wall of overy . Placentation can be
Answer» BASEL AXILE PARIETAL FREE central. Answer :C

Discussion

15041.	Question : In understanding different types of symmetry , the term used as principal axis means
Answer» a FLAT AREA that runs through any axis an IMAGINARY straight line joining the two opposite points at the ends an imaginary straight line joining the mid-point at one end and the mid-point at the opposite end an ANIMAL having its body PARTS arranged in such a manner to exhibits symmetry Solution :an imaginary straight line joining the two opposite points at the ends

Discussion

15042.	Question : In ul((i)) conditions, both male and female flowers are borne on same plant an example of such plants is ul((ii)).
Answer» `{:((i),(ii).),("mmonoecious","cucurbit"):}` `{:((i),(ii).),("mmonoecious","papaya"):}` `{:((i),(ii).),("dioecious","cucurbit"):}` `{:((i),(ii).),("dioecious","papaya"):}` Solution :MONOECIOUS plant species have SEPARATE male and female flowers on the same plant. Examples of monoecious plants are maize BIRCH, coconut and cucurbit. THe plants in which male and female flowers are borne on separate individual are referred to as referred to as dioecious plants e.g., papaya, DATA PALM.

Discussion

15043.	Question : In Ulothrix/Spirogyra, reduction division (meiosis) occurs at the time of
Answer» gamete formation zoospore formation zygospore germination vegetative reproduction Solution :(c) In Ulothrix/Spirogyra, meiosis takes place at the time of zygospore germination. It takes place when (+) and (-) plants/filaments results in the formation of diploid zygote (2x).Zygote is tetraflagellated, it SECRETES a thick wall and becomes non-MOTILE to form diploid zygospore. Under FAVOURABLECONDITIONS, zygospore undergoes zygotic meiosis to form motile tetraflagellated zoomeiospores or non-motile aplanomeiospores. Each meiospore (haploid) germinates to new filament of (+) (-) STRAIN.

Discussion

15044.	Question : In ul A of the dicotyledonous plants , the ul B elongation of the radicle leads to the formation of ul C.Choose the correct option.
Answer» `{:(A,B,C),("Few","Indirect","ROOTLETS"):}` `{:(A,B,C),("MAJORITY","Direct","SECONDARY roots"):}` `{:(A,B,C),("Few","Indirect","Primary roots"):}` `{:(A,B,C),("Majority","Direct","Primary roots"):}` ANSWER :4

Discussion

15045.	Question : In two different experiments, a pink coloured snapdragon plant undergoes selfing and in another one it is crossed with a white coloured snapdragon plant. Which of the following snapdragon are commonly produced in both the experiments?
Answer» Only red flowered plants Red flowered plants and white flowered plants Red flowered plants and pink flowered plants Pink flowered plants and white flowered plants Solution :Drosophila can be grown easily in simple synthetic MEDIUM Drosophila PRODUCE large number or offsprings ina single mating and its MALE and female INDIVIDUALS can beeasily recognised. These are some of the REASONS due to which it is considered as suitable material for genetic studies

Discussion

15046.	Question : (In T.S. anther, identify a, b and c)
Answer» (A) a - CONNECTIVE, b - pollen GRAINS, C - ENDOTHECIUM (B) a -endothecium, b - connective, c - pollen (C ) a - pollen grains, b - connective, c - endothecium, (D) a - endothecium, b - pollen grains, c - connective. Answer :A

Discussion

15047.	Question : In tryptophan synthesis pathway, tryptophan acts as a corepressor. What is its role as a corepressor?
Answer» It prevents transcription of the GENES of the operon It binds to the PROMOTER that blocks the attachment of RNA polymerase It binds to the tryptophan repressor to change it into its active form It binds to the operator gene at an ALLOSTERIC SITE to swich off the operon Answer :C

Discussion

15048.	Question : In tryptophan operon, the tryptophan acts as
Answer» COREPRESSOR promoter apo-repressor operator Answer :A

Discussion

15049.	Question : In true fruits,thalamus contribute to fruit formation.
Answer» True FALSE Answer :False FRUIT

Discussion

15050.	Question :In trp operon, the corepressor is
Answer» TRYPTOPHAN LACTOSE `BETA`-galactoside glucose ANSWER :A

Discussion

Explore topic-wise InterviewSolutions in .

Question : In which animals menstrual cycle occurs?

Question : In which animal nerve cell is present but brain is absent?

Question : In which animal both intracellular and intercellular digestion occurs

Question :In which age group more cases of STDs are seen?

Question : In wheat (monocot)

Question : In what ways does the interior surface of the membrane of a resting neuron differ from the external surface :-

Question : In what ways the coacervates were inferior to eobionts ?

Question : In what ways do the predators species get benefit from their prey?

Question : In what way, India achieved overall improvement in reproductive healt ?

Question : In what way Peyang conserved the forests?

Question : In what way have microbes played a major role in controlling disease caused by harmful bacteria ?

Question :In what way anaerobic sludge digestion is important in sewage treatments ?

Question : In what type of species interaction Species-A is benefited and Species-B is unaffected?

Question : In what type of species interaction Species-A is benefited and Species-B is harmed ?

Question : In what type of species interaction Species-A and Species-B is neither benefited norharmed ?

Question : In what type of reproduction male and female gametes are involved ?

Question : In what type of ecological interaction both partners are benefited ?

Question : In What respect, the heterotroph hypothesis differs from the early ideas of spontaneous generation?

Question : In what precell is differentiated with passes of time ?

Question : In western Ghats has how many endemic vertebrates among total vertebrates species 32678 in the world ?

Question : In what duration are cardiac cycle is completed?

Question : In Western blotting proteins are labelled with

Question : In Vorticella during binary fission plane of division passes along

Question : In Vivipary, how the developing embryoes are nourished?

Question : In vitro fertilisation is a technique that involves transfer of which one of the following into the fallopian tube ?

Question : In vitro clonal propagation in plants is characterized by:

Question : In vitro clonal propagation in plants is characterised by

Question :In virus infected plants the meristematic tissues in both apical and axillary buds are free of virus because

Question : In view of the current food crisis, it is said, that we need another green revolution. Highlight the major limitations of the earlier green revolution.

Question :In view of the current food crisis, it is said, that we need another green revolution. Highlight the major limitations of the earlier green revolution.

Question : In view of importance of genetic research, the genome of this plant is analysed

Question : In vexillary aestivation, largest petal, two smaller lateral petals and two smallest anterior petals are referred as _____, _____ and _____, respectively.

Question : In vexillary aestivation, keel represents

Question : In vertebrates, the ultimate source of ATP for muscle contraction is from______.

Question : In unit area which stored polysachharide porvides maximum energy?

Question : In vegetative propagation, characters of parent plants are:ChangedNot preservedPreservedExchanged

Question : In vegetative propagation ,characters of plants are:

Question : In unit area which stored polysaccharide provides maximum energy ?

Question : In unilocular overy the ovules develop on the inner wall of overy . Placentation can be

Question : In understanding different types of symmetry , the term used as principal axis means

Question : In ul((i)) conditions, both male and female flowers are borne on same plant an example of such plants is ul((ii)).

Question : In Ulothrix/Spirogyra, reduction division (meiosis) occurs at the time of

Question : In ul A of the dicotyledonous plants , the ul B elongation of the radicle leads to the formation of ul C.Choose the correct option.

Question : In two different experiments, a pink coloured snapdragon plant undergoes selfing and in another one it is crossed with a white coloured snapdragon plant. Which of the following snapdragon are commonly produced in both the experiments?

Question : (In T.S. anther, identify a, b and c)

Question : In tryptophan synthesis pathway, tryptophan acts as a corepressor. What is its role as a corepressor?

Question : In tryptophan operon, the tryptophan acts as

Question : In true fruits,thalamus contribute to fruit formation.

Question :In trp operon, the corepressor is

Question : In vexillary aestivation, largest petal, two smaller lateral petals and two smallest anterior petals are referred as ___, _ and ___, respectively.