24277 + Interview Questions in Biology in Class 12 Page 436 InterviewSolution

21751.	Question : Apposition image in eye of insects is formed in :
Answer» DIM LIGHT BRIGHT Light ocelli None ANSWER :B

Discussion

21752.	Question : Discuss various applications of DNA fingerprinting.
Answer» Solution :(1)DNA FINGERPRINTING was initially FORMULATED as forensic medicine TECHNIQUE.(2)The technique is used to establish PARENTAGE in disputed cases.(3)It can prove the heredity and thus is also used to settle insurance claims.(4)DNA fingerprinting technique is useful in study of phylogency(5)The agricultural science is also benefied by this technique.(6)The technique is also useful in genomics.

Discussion

21753.	Question : Applying the Robert May's global estimate more than ______________ plant species and more than ______________ animals species is yet to be discovered and described in India .
Answer» 1,00,000, 3,00,000` 3,00,000 , 1,00,000 2,00,000 , 50,000 2,00 , 3, 000 Answer :A

Discussion

21754.	Question : Application of colchicine to a vegetative bud of a homozygous tall diploid tomato plant (DD) caused development ofa tetraploid branch. What is the genotype of the somatic cells of this branch?
Answer» DDD DDDD DDdd DdDd Answer :B

Discussion

21755.	Question : Apple growers usually keep bees in the orchard even through apples are usually wind- pollinated because :
Answer» Wind-POLLINATION result in APPLES of inferior quality Insect- pollination result in apples of superior quality Wind-pollination may fail at the right time and bees wouldbring about pollination in such a situation Bess can INJECT honey into the apples and MAKE them sweeter Answer :C

Discussion

21756.	Question : Appearance of vegetative propagules from the nodes of plants such as sugarcane and ginger is mainly because.(A) Nodes are shorter than internodes(B) Nodes have meristematic cells(C) Nodes are located near the soil(D) Nodes have non - photosynthetic cells
Answer» Nodes are SHORTER than internodes Nodes have meristematic cells Nodes are located near the soil Nodes have NON - photosynthetic cells Solution :Appearance of vegetative propagules from the nodes of plants such as sugarcane and ginger is MAINLY because meristematic cells are located in nodes. EXAMPLES of vegetative propagules :(i) Leaf buds of Bryophyllum, (II) Eyes of potato, (iii) Bulbils of Agave, (iv) Offset of water hyacinth, (v) Rhizome of ginger.

Discussion

21757.	Question : Appearance ofnew combinations in F_(2) generation in a dihybrid cross proves the law of .....
Answer» dominance segregation independent assortment purity of gamete Answer :C

Discussion

21758.	Question : Appearanceof holein stratosphericozone layeris causedby the emissionof green house gases , it is due tothe reactionbetween
Answer» `O_3` and CI `O_3` and F `O_2` and F `O_2` and CI Answer :A

Discussion

21759.	Question : Appearance of dry, scaly lesions on skin, which are accompanied by itching occur in which of the following disease?
Answer» Measles Chicken pox Ringworm Small pox Answer :C

Discussion

21760.	Question : Appearance of antibiotic-sistant bacteria is an example of
Answer» adptive radiation transduction pre-existing VARIATION in the POPULATION DIVERGENT evolution. Answer :C

Discussion

21761.	Question : Apospory is seen in …………… .
Answer» CITRUS Aerva Parthenium Eupatorium Answer :A

Discussion

21762.	Question : Appearance of ancestral characters in the new borns, such as tail, gill slits, etc. are known as
Answer» HOMOLOGOUS Analogous Vestigial Atavism ANSWER :D

Discussion

21763.	Question : Appearance of antibiotic-resistant bacteria is an example of
Answer» adaptive radiation transduction pre-existing variation in the POPULATION divergent evolution. Solution :When a bacterial population encounters a particulars antibiotic, those sensitive to it DIE, But some bacteria having mutations become resistant to the antibiotic. Such resistant bacteria survive and multiply quickly as the competing bacteria have died. Soon the resistance PROVIDING genes become widespread and ENTIRE bacterial population becomes resistent.

Discussion

21764.	Question : A.portion of stomach opens into the duodenum via B.select the option which correctly describes A and B respectively
Answer» A) FUNDUS,B)CARDIAC sphinter A) Cardiac,B) PYLORIC sphincter A)Pyloric,B) GASTROESOPHAGEAL sphincter A)Pyloric B)Pyloric sphincter Answer :D

Discussion

21765.	Question : Aporepressor is inactive repressor in Tryptophan repressible operon system. It is
Answer» ALWAYS PROTEIN may be protein or a NUCLEIC acid a metabolite a substrate Answer :A

Discussion

21766.	Question : Apoplastic pathway is observed in
Answer» LATERAL CONDUCTION of water Ascent of sap Movement of ORGANIC solutes 1 and 2 Answer :D

Discussion

21767.	Question : Apophysis in the capsule of Funaria is
Answer» lower PART upper part middle part fertile part Solution :(a) Capsule (the BODY containing spores) of Funaria is differentated into-operculum (cap shaped 2-3 layered thick lid on THEH top), theca (middle fertile part) and apophysis (sterile, solid basal portion of the capsule having chlloroplasts).

Discussion

21768.	Question : Apomixis : Seeds without fertilization _____ : Fruits without fertilization
Answer» SOLUTION :PARTHENOCARPY

Discussion

21769.	Question : Apomixis will reduce the cultivation cost of hybrid plants . Explain.
Answer» Solution :HYBRID seeds are costly and must be produced every year because the seeds from hybrids do not GIVE the same characters. If these hybrids are MADE into APOMICTS there is no segregation of characters and the farmers can use the seeds of hybrids .

Discussion

21770.	Question : Apomixis is a form of asexual reproduction that mimics sexual reproduction . Is the statement correct ? Explain.
Answer» Solution :YES apomixis is a SPECIAL mechanism of producing SEEDS without FERTILIZATION . So it is asexual reproduction . But the diploid CELL of the ovule develops into embryo without fertilization . So it mimics sexual reproduction.

Discussion

21771.	Question : Apomixis on plant means, development of a plant :
Answer» NEW ORGANISM WITHOUT FUSION of gametes New orgnism from fusion products of gametes Embryo from endosperm Embryo from nucellus Answer :A

Discussion

21772.	Question : Apomixis in plant means development of a plant(A) from root cutting(B) without fusion of gametes(C) from fusion of gametes(D) from steam cutting
Answer» from ROOT cutting without FUSION of gametes from fusion of gametes from STEAM cutting Answer :B

Discussion

21773.	Question : What is Apomixis? Give its importance
Answer» SOLUTION :To PRODUCE seeds without fertilisation is CALLED apomixis. EG. Many species of lemon and mango

Discussion

21774.	Question : Apomictic ernbryos in Citrus arise from
Answer» synergids maternalsporophytic TISSUE in ovule antipodal cells diploid egg Answer :B

Discussion

21775.	Question : Apomictic embryos in Citrus arise from :
Answer» Synergids MATERNAL SPOROPHYTIC tissue ANTIPODALS EGG cell Answer :B

Discussion

21776.	Question : Apolysis favours Taenia solium . How ?
Answer» Solution :In the tapeworm , Taenia solium the gravid (ripe) proglottids are the oldest at the POSTERIOR end of the strobila . The gravid proglottids are REGULARLY CUT off either singly or in groups from the posterior and by a process called apolysis . This is very significant since it helps in transferring the developed embryos from the PRIMARY host (man) to FIND a secondary host (pig).

Discussion

21777.	Question : Apoenzyme and cofactor together constitute_____.
Answer» ANSWER :HOLOENZYME

Discussion

21778.	Question : Apnoea is:
Answer» DECREASED ventilation Absence of breathings Laboured breathing Increased ventilation Answer :B

Discussion

21779.	Question : (A)______plants have a higher temperature optimum than the plants adapted to (B)_____ climates.
Answer» ANSWER :A-tropical B-temperate

Discussion

21780.	Question : Apis millifera is commonly called _____.
Answer» ANSWER :EUROPIAN BEE

Discussion

21781.	Question : Apiculture is associated with which of the following group of plants
Answer» grapes , MAIZE , potato SUGARCANE , PADDY , banana guava , sunflower , strawberry PINEAPPLE , sugarcane , strawberry Answer :C

Discussion

21782.	Question : Apiculture is.............
Answer» classification of honey BEES DISTRIBUTION of honey bees REARING of honey bee colonies social organisation of honey bee Solution :rearing of honey bee colonies

Discussion

21783.	Question : Apiculture is good for agricultural crops. Justify.
Answer» SOLUTION :"Apiculture" is the bee-KEEPING industry. Bees are pollinators of MANY of our crop SPECIES, such as sunflower, BRASSICA, apple and peas. Keeping bee hives in crop fields during flowering period increases pollination and improves the yield.

Discussion

21784.	Question : Apical meristem is responsible for increasing length of stem but in ______ length is mainly controlled by ______ -
Answer» EQUISETUM , Lateral meristem GRASSES, PROTODERM Grasses, Intercalary meristem Grasses, PROCAMBIUM Answer :3

Discussion

21785.	Question : Apical end of the cell of Euglenabears an invagination with three parts ____(a) , ____(b) , ____(c).
Answer» Cytostome (a) - Cytopharynx (b) - RESERVOIR (c) Mouth (a) - GULLET (b) - Cytopharynx (c) Stigma (a) - Cytostome (b) - Gullet (c) Contractile (a) - Gullet (b) - Reservoir (c) ANSWER :A

Discussion

21786.	Question : Apical and axillary meristem are free of virus due to (i) concentration of (ii) and rapid rate of cell division. Select the correct option to an in the blanks (i and (ii).
Answer» (i) LOW, (II) Cytokinins (i) Low, (ii) GIBBERELLINS (i) HIGH, (ii) Auxins (i) High, (ii) Abscisic acid Answer :C

Discussion

21787.	Question : Apical dominance is caused by
Answer» auxin ethylene gibberellin cytokinin Solution :Auxin hormone is RESPONSIBLE for APICAL DOMINANCE process as it inhibits the growth of lateral BUDS.

Discussion

21788.	Question :Aperture of an eye can be changed by :
Answer» Aquous HUMOR VITREOUS humor CILIARY MUSCLES Iris Answer :D

Discussion

21789.	Question : Apart from plants and animals, microbes form a permanent biotic component in an ecosystem. While plants have been referred to as autotrophs and animals as heterotrophs, what are microbes referred to as ? How do the microbes fulfil their energy requirements ?
Answer» Solution :On the basis of nutrition LIVING organisms are classified in to two parts namely autotrophs and HETEROTROPHS, autotrophs are light synthesize autotrophs and chemical synthesize or autotrophs who synthesize light and heterotrophs who synthesize chemical, WHITE heterotrophs are classified into paracites HUNTING or detritus etc. Microbes are detrititious and get nutrition from dead organic mass. They are seen in plants and animals. Digestion OCCURS outside the cell in them.

Discussion

21790.	Question : Aphids on the mustard plants are controlled with the help of .................
Answer» SOLUTION : LADY BIRD BEETLES,

Discussion

21791.	Question : Ape and Man.
Answer» SOLUTION :

Discussion

21792.	Question : APC stands for Antigen producing cells.
Answer» ANSWER :ANTIGEN PRESENTING CELL

Discussion

21793.	Question : Apart from miller and Urey, who produced complex compounds from simpler compounds to prove theory of physico-chemical evolution?
Answer» Fox Dobzhansky CALVIN Both (a) and (C) ANSWER :D

Discussion

21794.	Question : Apart from DNA polymerase, name any other four enzymes which were involved in DNA replication of eukaryotic cell.
Answer» SOLUTION :DNA LIGASE, Topoisomerase (DNA gyrase), HELICASE and NUCLEASE.

Discussion

21795.	Question : Apant of Antirrhinum majus with red flowers was crossed with another plant of the same species with white flowers. The plants of the F_(1) generation bore pink flowers . Explain the patttern o inheritance with the help of a cross.
Answer» SOLUTION :The progeny of first GENERATION had PINK flowers because the gane for the red flower colour was not completely dominant over the gene for the white flower.This pattern of INHERITANCE s known as incomplate dominace.

Discussion

21796.	Question : Aortic arch and carotid artery receptors can recognize changes in:
Answer» ANSWER :`CO_(2),H^(+)`

Discussion

21797.	Question : Any recombinant DNA with desired gene is required in billon copies for commercial uses. How is this amplification done? Mention its steps.
Answer» Solution :AMPLIFICATION is the SYNTHESIS of MULTIPLE copies of gene of interest in vitro using two sets of primers and DNA polymerase enzyme. It employs PCR (Polymerase Chain Reaction). PCR is the repeated cycling of FOLLOWING three steps: 1. Denaturation 2. Annealing 3. Extension

Discussion

21798.	Question : Any undesirable change in physical, chemical on biological characteristics of air, land, water or soi is called :
Answer» Pollutant Pollution Sewage Harmful SUBSTANCES ANSWER :B

Discussion

21799.	Question : Any inherited physical or molecular characteristic that differs among individuals and is easily detectable in the laboratory is called
Answer» Mini-satellites RNA POLYMORPHS CODING DNA Genetic marker Answer :D

Discussion

21800.	Question : Anumber of natural have been created to conserve specific wildlife species. Identify the correct combination from the following
Answer» Gir-Lion Sariska -Tiger Sunderban -Rhino Kaziranga - Musk deer Solution : Rann of kutch is situated in GUJARAT and provides protection mainly to WILD ass,whereas musk deers are mainly protected in kedarnath sanctuary. Gir is FAMOUS for asiatic lions. Kaziranga is famous for one-horned RHINOCEROS.

Discussion

Explore topic-wise InterviewSolutions in .

Question : Apposition image in eye of insects is formed in :

Question : Discuss various applications of DNA fingerprinting.

Question : Applying the Robert May's global estimate more than ______________ plant species and more than ______________ animals species is yet to be discovered and described in India .

Question : Application of colchicine to a vegetative bud of a homozygous tall diploid tomato plant (DD) caused development ofa tetraploid branch. What is the genotype of the somatic cells of this branch?

Question : Apple growers usually keep bees in the orchard even through apples are usually wind- pollinated because :

Question : Appearance of vegetative propagules from the nodes of plants such as sugarcane and ginger is mainly because.(A) Nodes are shorter than internodes(B) Nodes have meristematic cells(C) Nodes are located near the soil(D) Nodes have non - photosynthetic cells

Question : Appearance ofnew combinations in F_(2) generation in a dihybrid cross proves the law of .....

Question : Appearanceof holein stratosphericozone layeris causedby the emissionof green house gases , it is due tothe reactionbetween

Question : Appearance of dry, scaly lesions on skin, which are accompanied by itching occur in which of the following disease?

Question : Appearance of antibiotic-sistant bacteria is an example of

Question : Apospory is seen in …………… .

Question : Appearance of ancestral characters in the new borns, such as tail, gill slits, etc. are known as

Question : Appearance of antibiotic-resistant bacteria is an example of

Question : A.portion of stomach opens into the duodenum via B.select the option which correctly describes A and B respectively

Question : Aporepressor is inactive repressor in Tryptophan repressible operon system. It is

Question : Apoplastic pathway is observed in

Question : Apophysis in the capsule of Funaria is

Question : Apomixis : Seeds without fertilization _____ : Fruits without fertilization

Question : Apomixis will reduce the cultivation cost of hybrid plants . Explain.

Question : Apomixis is a form of asexual reproduction that mimics sexual reproduction . Is the statement correct ? Explain.

Question : Apomixis on plant means, development of a plant :

Question : Apomixis in plant means development of a plant(A) from root cutting(B) without fusion of gametes(C) from fusion of gametes(D) from steam cutting

Question : What is Apomixis? Give its importance

Question : Apomictic ernbryos in Citrus arise from

Question : Apomictic embryos in Citrus arise from :

Question : Apolysis favours Taenia solium . How ?

Question : Apoenzyme and cofactor together constitute_____.

Question : Apnoea is:

Question : (A)______plants have a higher temperature optimum than the plants adapted to (B)_____ climates.

Question : Apis millifera is commonly called _____.

Question : Apiculture is associated with which of the following group of plants

Question : Apiculture is.............

Question : Apiculture is good for agricultural crops. Justify.

Question : Apical meristem is responsible for increasing length of stem but in ______ length is mainly controlled by ______ -

Question : Apical end of the cell of Euglenabears an invagination with three parts ____(a) , ____(b) , ____(c).

Question : Apical and axillary meristem are free of virus due to (i) concentration of (ii) and rapid rate of cell division. Select the correct option to an in the blanks (i and (ii).

Question : Apical dominance is caused by

Question :Aperture of an eye can be changed by :

Question : Apart from plants and animals, microbes form a permanent biotic component in an ecosystem. While plants have been referred to as autotrophs and animals as heterotrophs, what are microbes referred to as ? How do the microbes fulfil their energy requirements ?

Question : Aphids on the mustard plants are controlled with the help of .................

Question : Ape and Man.

Question : APC stands for Antigen producing cells.

Question : Apart from miller and Urey, who produced complex compounds from simpler compounds to prove theory of physico-chemical evolution?

Question : Apart from DNA polymerase, name any other four enzymes which were involved in DNA replication of eukaryotic cell.

Question : Apant of Antirrhinum majus with red flowers was crossed with another plant of the same species with white flowers. The plants of the F_(1) generation bore pink flowers . Explain the patttern o inheritance with the help of a cross.

Question : Aortic arch and carotid artery receptors can recognize changes in:

Question : Any recombinant DNA with desired gene is required in billon copies for commercial uses. How is this amplification done? Mention its steps.

Question : Any undesirable change in physical, chemical on biological characteristics of air, land, water or soi is called :

Question : Any inherited physical or molecular characteristic that differs among individuals and is easily detectable in the laboratory is called

Question : Anumber of natural have been created to conserve specific wildlife species. Identify the correct combination from the following

Question : Applying the Robert May's global estimate more than plant species and more than animals species is yet to be discovered and described in India .

Question : (A)__plants have a higher temperature optimum than the plants adapted to (B)_ climates.

Question : Apical meristem is responsible for increasing length of stem but in length is mainly controlled by -

Question : Apical end of the cell of Euglenabears an invagination with three parts (a) , (b) , (c).