24277 + Interview Questions in Biology in Class 12 Page 404 InterviewSolution

20151.	Question : By observing the given diagram and answer the following questions: (a) Name the technique mentioned in the given diagram. (b) The last step of this identified technique is Elution. What is meant by elution.
Answer» SOLUTION :(a) GEL elecropohoresis (b) The separated bands of DNA are CUT from the agarose gel and extracted from the gel piece. This STEPS is known as elution.

Discussion

20152.	Question : By how much is earth's temperature expected to rise between 1950 and 2020?(A) 0.1^(@)C(B) 0.5^(@)(C) 1^(@)C(D) 2^(@)C
Answer» `0.1^(@)C` `0.5^(@)` `1^(@)C` `2^(@)C` ANSWER :B

Discussion

20153.	Question : By identifying the shape of the potato, select the option that represents the causative agent for this condition
Answer» VIRUS VIRION Viroid Prion Answer :C

Discussion

20154.	Question : By continued inbreeding, when the fertility of the offsprings decreases ?
Answer» Due to decreasing homozygosity Due to collection of harmful RECESSIVE genes. Due to ACHIEVING the OPPORTUNITY for the desired characters. Due to decrease in heterozygosity Solution :Due to decreasing homozygosity

Discussion

20155.	Question : By conducting_____ G. J. Mendelfirst demonstrate the scientific based of of______.
Answer» selfing EXPERIMENTS, HEREDITY and variation Hybridisation experiments, CHROMOSOMAL behaviour of gene hybridisation experiment, INHERITANCE and variation Himachal Bollywood selfing experiments, ONE gene interaction Answer :C

Discussion

20156.	Question : By analysing the given figure answer the following questions: (a) Name the process mentined in the given figure (b) Identify the labelled part A & B
Answer» Solution :Formation of recombinant DNA by action of RESTRICTION ENDONUCLEASE enzyme-EcoRI. (b) A-DNA fragment joins at STICKY ENDS by DNA ligase. B-Recombinant DNA.

Discussion

20157.	Question : By addition of what in water eutrophication occurs ?
Answer» Detergent Fertilizer Sewage Above all ANSWER :D

Discussion

20158.	Question : By activetransport____ movesintothe cellswhereit isutilisedor stored .
Answer» GLUCOSE SUCROSE fructose WATER ANSWER :B

Discussion

20159.	Question : Butyric acid is produced by
Answer» ASPERGILLUS niger Acetobacter aceti Lactobacillus lacti none of these Answer :D

Discussion

20160.	Question : Bursa of Fabricius
Answer» Is equivalent to bone marrow of human Is primary lymphoid organ of aves Is associated with PROLIFERATION of lymphocytes Both (1) and (2) Answer :D

Discussion

20161.	Question : Burial of dead with due rites is considered to be an important step in human evolution. Which human was first to perform these ceremonies?
Answer» SOLUTION :Neanderthal MAN was the first HUMAN to PERFORM the ceremonies for BURIAL of the dead.

Discussion

20162.	Question : Bundle sheath chloroplasts and Mesophyll chloroplasts.
Answer» SOLUTION :

Discussion

20163.	Question : "Bundle of His" is a group of:
Answer» NERVOUS fibres Muscles fibres Tendons Ligamets Answer :B

Discussion

20164.	Question : Bull's semen is stored in :
Answer» ICE Licquid `N_2` Licquid `CO_2` Licquid `O_2` ANSWER :B

Discussion

20165.	Question : Bulk of carbon dioxide (CO_2) released from body tissues into the blood is present as
Answer» Bicarbonate in blood PLASMA and RBCs FREE `CO_2` in blood plasma 70% as carbamino-haemoglobin and 30% as bicarbonate Carbamino-haemoglobin in RBCs Answer :A

Discussion

20166.	Question : Bulk flow of water, minerals and organic solutes is due to
Answer» Pressure Concentration Temperature 1 and 2 Answer :A

Discussion

20167.	Question : Bulk of tooth is made up of:
Answer» Dentine Enamel Pulp cavity Root Answer :A

Discussion

20168.	Question : Bulk flow in plants is due to
Answer» POSITIVE pressure Negative pressure Both 1 and 2 Concentration gradient Answer :C

Discussion

20169.	Question : Bulbo urethral gland
Answer» SOLUTION :Location : This gland is LOCATED behind prostate gland on either side of urethra. Function : Its SECRETION ACTS as lubrication agent.

Discussion

20170.	Question : Bulbils are employed for multiplication of :BryophyllumcrocusAgavestrawberry
Answer» Bryophyllum crocus Agava strawberry Answer :B

Discussion

20171.	Question : Buffaloes are considered better than cows because ……………..
Answer» They are RESISTANT to DISEASES They give more milk They give LONGER All of the above SOLUTION :All of the above

Discussion

20172.	Question : Buds and conidia are asexual reproductive structures of
Answer» HYDRA & Rhizopus Rhizopus & Penicillium Hydra & Penicillium Both a and b Answer :A

Discussion

20173.	Question : Budding condition of which of the following spores is referred as "Torula Stage"?
Answer» Oospores Chlamydospores Oidia Conidia Answer :C

Discussion

20174.	Question : Budding is found in(A) Sycon(B) Hydra(C) Fasciola(D) Obelia
Answer» sycon hydra FASCIOLA OBELIA ANSWER :B

Discussion

20175.	Question : Bud grafting is commonly used in:
Answer» Litchi pomegranate Rose JASMINE ANSWER :C

Discussion

20176.	Question : The axillary bud later develops into a
Answer» SOLUTION :Cells of some part of the body of the animal REPEATEDLY UNDERGO mitotic division and raised regions of CELL masses CALLED bud are formed.

Discussion

20177.	Question : Buchner succesfully extracted the
Answer» ATP Ztmase Plastids hexokinase Solution :NA

Discussion

20178.	Question : Bt toxin seen inside Bt cotton exists in an inactive form. But when a pest feeds on Bt cotton, it dies. How does the toxin in cotton plant kill the pest?
Answer» Solution :When the INSECT pest ingests the inactive toxin, it is converted into an active form of toxin due to the ALKALINE PH of the GUT which solubilise the toxin crystals. The activated toxin binds to the surface of MID gut epithe lial cells and creates pores, which causes cell swelling and lysis and eventually death of the insect

Discussion

20179.	Question : Bt toxins are
Answer» INTRACELLULAR lipids intracellular CRYSTALLINE proteins extracellular crystalline proteins intracellular polysaccharides Answer :B

Discussion

20180.	Question : Bt toxin protein crystals present in bacterium Bacillus thuringiensis, do not kill the bacteria themselves because
Answer» BACTERIA are resistant to the toxin TOXINS occur as inactive protoxins in bacteria bacteria enclose toxins in a special sac none of these Answer :B

Discussion

20181.	Question : Bt toxin kills insects by
Answer» inhibiting protein synthesis generating EXCESSIVE heat creating PORES in the MIDGUT epithelial cells, leading to cell swelling and lysis obstructing a biosynthetic pathway Answer :C

Discussion

20182.	Question : Bt toxin is produced by Bacillus thuringiensis that can kill certain insects. Why the toxin produced by the bacterium is nontoxic to it?
Answer» Solution :Bacillus thuringiensis PRODUCE Bt toxin - insecticidal protein, ACTUALLY this protein exist in INACTIVE form called protoxin. So it does not kill BACTERIA.

Discussion

20183.	Question : Bt toxin is produced by Bacillus thuringiensis that can kill certain insects. Name the bacterial gene that is producing this toxin.
Answer» SOLUTION :CRY GENE/Bt gene

Discussion

20184.	Question : Bt toxin is obtained from
Answer» PROKARYOTES EUKARYOTES Both (a) and (B) NONE of these Answer :A

Discussion

20185.	Question : 'Bt' toxin is
Answer» INTRACELLULAR lipid Intracellular CRYSTALLINE protein Extracellular crystalline protein Lipid ANSWER :B

Discussion

20186.	Question : Bt toxin is
Answer» Protein Carbohydrate Lipid Enzyme Answer :A

Discussion

20187.	Question : Bt toxin have been expressed in plants in order to provide resistance against i. Lepidopterans and fungiii. Animals and bacteriaiii. Bacteria and fungiiv. Coleopterans and dipterans v. Lepidopterans
Answer» (II) and (III) (i) ,(ii) and (IV) (iii) and (V) (iv) and (v) SOLUTION :(iv) and (v)

Discussion

20188.	Question : Bt toxin genes have been expressed in plants in order to provide resistance against (i) lepidopterans and fungi (ii) animals and bacteria (iii) bacteria and fungi (iv) coleopterans and dipterans (v) lepidopterans
Answer» (II) and (III) (i),(ii) and (IV) (iii) and (V) (iv) and (v) ANSWER :D

Discussion

20189.	Question : Bt toxin gene has been cloned from the bacteria and expressed in plants to provide resistance to insects without the need for insecticides. Select these resistant plants from the given list.
Answer» (i), (II), (III) and (iv) (ii), (iii), (iv) and (V) (i), (ii), (v) and (VI) All of these Answer :D

Discussion

20190.	Question : Bt toxin gene has been cloned from the bacteria and expresed in plants to provide resistance to insects without the need for insecticides. Exampleso of such plants are
Answer» COTTON and corn rice and potato tomato and soybean all of these Answer :D

Discussion

20191.	Question : Bt stands for______.
Answer» ANSWER :BACILLUS thuringiensis

Discussion

20192.	Question : Bt protein can not kill Bacillus.
Answer» Solution :Bt protein can.t KILL Bacillus because the Bt toxin protein exist as inactive protoxins but once an insect ingest the inactive toxin. It is converted into an ACTIVE form of toxin DUE to alkaline pH of the GUT which solublise the crystals. Thus this protein kills only insects, it can not kill Bacillus.

Discussion

20193.	Question : Bt is known as
Answer» BACILLUS tumor bacillus thuringiensis Bacillus toxin Bacillus tomato Answer :B

Discussion

20194.	Question : Bt in popular Bt-cotton stands for
Answer» Biotechnology Bacillus tomentosa Bacillus thuringiensis Best type Answer :C

Discussion

20195.	Question : Bt in Bt cotton signifies biotechnology.
Answer» Solution :Bt STANDS for soll bacterium BACILLUS thuringiensis, which FORM a cry protein,

Discussion

20196.	Question : Bt gene is transferred to plants from the bacterium_________
Answer» ANSWER :A::B::C

Discussion

20197.	Question : Bt gene is got from
Answer» BRASSICA napus Bacillus thuringiensis Azolla sp. Rhizobium sp. Answer :B

Discussion

20198.	Question : Bt cotton is resistant to pest, such as lepidopteron, dipterans and coleopterans. Is Bt cotton also resistant to other pests as well ?
Answer» Solution :Bt COTTON is MADE resistant to only CERTAIN SPECIFIC taxa of pests. It is quite likely that in FUTURE, some other pests may infest this Bt cotton plants.

Discussion

20199.	Question :Bt cotton is resistant to
Answer» INSECTS HERBICIDES Salt Drought ANSWER :A

Discussion

20200.	Question :'Bt' cotton is resistant to
Answer» INSECTS HERBICIDES SALT DRAUGHT ANSWER :A

Discussion

Explore topic-wise InterviewSolutions in .

Question : By observing the given diagram and answer the following questions: (a) Name the technique mentioned in the given diagram. (b) The last step of this identified technique is Elution. What is meant by elution.

Question : By how much is earth's temperature expected to rise between 1950 and 2020?(A) 0.1^(@)C(B) 0.5^(@)(C) 1^(@)C(D) 2^(@)C

Question : By identifying the shape of the potato, select the option that represents the causative agent for this condition

Question : By continued inbreeding, when the fertility of the offsprings decreases ?

Question : By conducting_____ G. J. Mendelfirst demonstrate the scientific based of of______.

Question : By analysing the given figure answer the following questions: (a) Name the process mentined in the given figure (b) Identify the labelled part A & B

Question : By addition of what in water eutrophication occurs ?

Question : By activetransport____ movesintothe cellswhereit isutilisedor stored .

Question : Butyric acid is produced by

Question : Bursa of Fabricius

Question : Burial of dead with due rites is considered to be an important step in human evolution. Which human was first to perform these ceremonies?

Question : Bundle sheath chloroplasts and Mesophyll chloroplasts.

Question : "Bundle of His" is a group of:

Question : Bull's semen is stored in :

Question : Bulk of carbon dioxide (CO_2) released from body tissues into the blood is present as

Question : Bulk flow of water, minerals and organic solutes is due to

Question : Bulk of tooth is made up of:

Question : Bulk flow in plants is due to

Question : Bulbo urethral gland

Question : Bulbils are employed for multiplication of :BryophyllumcrocusAgavestrawberry

Question : Buffaloes are considered better than cows because ……………..

Question : Buds and conidia are asexual reproductive structures of

Question : Budding condition of which of the following spores is referred as "Torula Stage"?

Question : Budding is found in(A) Sycon(B) Hydra(C) Fasciola(D) Obelia

Question : Bud grafting is commonly used in:

Question : The axillary bud later develops into a

Question : Buchner succesfully extracted the

Question : Bt toxin seen inside Bt cotton exists in an inactive form. But when a pest feeds on Bt cotton, it dies. How does the toxin in cotton plant kill the pest?

Question : Bt toxins are

Question : Bt toxin protein crystals present in bacterium Bacillus thuringiensis, do not kill the bacteria themselves because

Question : Bt toxin kills insects by

Question : Bt toxin is produced by Bacillus thuringiensis that can kill certain insects. Why the toxin produced by the bacterium is nontoxic to it?

Question : Bt toxin is produced by Bacillus thuringiensis that can kill certain insects. Name the bacterial gene that is producing this toxin.

Question : Bt toxin is obtained from

Question : 'Bt' toxin is

Question : Bt toxin is

Question : Bt toxin have been expressed in plants in order to provide resistance against i. Lepidopterans and fungiii. Animals and bacteriaiii. Bacteria and fungiiv. Coleopterans and dipterans v. Lepidopterans

Question : Bt toxin genes have been expressed in plants in order to provide resistance against (i) lepidopterans and fungi (ii) animals and bacteria (iii) bacteria and fungi (iv) coleopterans and dipterans (v) lepidopterans

Question : Bt toxin gene has been cloned from the bacteria and expressed in plants to provide resistance to insects without the need for insecticides. Select these resistant plants from the given list.

Question : Bt toxin gene has been cloned from the bacteria and expresed in plants to provide resistance to insects without the need for insecticides. Exampleso of such plants are

Question : Bt stands for______.

Question : Bt protein can not kill Bacillus.

Question : Bt is known as

Question : Bt in popular Bt-cotton stands for

Question : Bt in Bt cotton signifies biotechnology.

Question : Bt gene is transferred to plants from the bacterium_________

Question : Bt gene is got from

Question : Bt cotton is resistant to pest, such as lepidopteron, dipterans and coleopterans. Is Bt cotton also resistant to other pests as well ?

Question :Bt cotton is resistant to

Question :'Bt' cotton is resistant to

Question : By conducting_ G. J. Mendelfirst demonstrate the scientific based of of__.