24277 + Interview Questions in Biology in Class 12 Page 97 InterviewSolution

4801.	Question : The residue left after methane production from cattle dung is :
Answer» burnt BURIED in LAND fills USED as manure used in CIVIL construction Answer :C

Discussion

4802.	Question : The reservoir for the gaseous type of bio-geo chemical cycle exists in:
Answer» STRATOSPHERE ATMOSPHERE IONOSPHERE LITHOSPHERE ANSWER :a

Discussion

4803.	Question : The reptiles , like dinosaurs were dominant in ......period.
Answer» CRETACEOUS JURASSIC Tertiary Triassic Solution :Jurassic

Discussion

4804.	Question :The repressor in case of lac operon will bind in absence of lactose :
Answer» PROMOTOR SITE Operator site REGULATOR site Structural gene Answer :B

Discussion

4805.	Question : The "repeating unit" of glycogen is
Answer» Fructose Mannose Glucose Galactose Answer :C

Discussion

4806.	Question : The removal of introns from the RNA is called ……… .
Answer» elongation splicing capping tailing Answer :B

Discussion

4807.	Question : The renal portal system of vertebrates is significant for
Answer» Elimination of excess fats by kidneys Removing NITROGENOUS WASTES in kidneys Supplying FOOD to the kidneys Draining BLOOD from the kidney Answer :B

Discussion

4808.	Question : The releasing hormones are produced by
Answer» TESTIS Pancreas Pituitary Hypothalamus. Answer :D

Discussion

4809.	Question : The relaxin secreted by placenta relaxes the pubic ligaments during parturition.i. Mention the other hormones secreted by placenta. ii. Suppose relaxin is not secreted, mention the other method for the delivery of the child.
Answer» SOLUTION :i. HCG, chorionic thyrotropin, chorionic CORTICOTROPIN, chorionic, somatomammotropin, estrogen and progesterone. ii. CAESAREAN operation.

Discussion

4810.	Question : The relationship when one species is harmed and other remain unaffected :
Answer» AMENSALISM PREDATION SYMBIOSIS PARASITISM ANSWER :A

Discussion

4811.	Question : The relative fitness of different types within a population is probably
Answer» unchanging permanent changeable both (a) and (C) ANSWER :C

Discussion

4812.	Question : The relationship between two organisms in which one obtains some benefit and other is neither benefited nor harmed.
Answer» PARASITISM PREDATION Symbiosis Commensalism Answer :D

Discussion

4813.	Question : The relationshipbetweentwoorgansimsin whichone obtainssome benefit at the expense ofthe otheris called.
Answer» PARASITISM PREDATION NONE of these Answer :a

Discussion

4814.	Question : The relation ship between sucker fish and shark is ......... .
Answer» Competition COMMENSALISM Predation Parasitism Solution :Commensalism

Discussion

4815.	Question : The relation between species richness and area is described on a logarithmic scale by the equation [where S = species richness, A = area, Z = slope of the line (regression coefficient ), C= Y - intercept]
Answer» LOG `S`= log `C` - `Z` log `B` log `S` = `Z` log `A` log `S` = log `C` + `Z` log `A` log `S` = log `C` ANSWER :C

Discussion

4816.	Question : The regulatory genes are located
Answer» ALONG with the STRUCTURAL genes in between OPERATOR and the structural genes in the MIDDLE of the structural genes in FRONT of the structural genes Answer :D

Discussion

4817.	Question : The rejection of organ transplanting in humans is prevented from
Answer» aspirin cyclosporin calcitonin thrombin Answer :B

Discussion

4818.	Question : Fill in the blank: The region of Biosphere Reserve which is legally protected and where no human activity is allowed is known as ___________.
Answer» BUFFER ZONE Core zone TRANSITION zone Restoration zone Answer :B

Discussion

4819.	Question :The region of the spectrum, which does not cause photoperiodic induction is
Answer» blue region RED region green region far-red region Answer :C

Discussion

4820.	Question : The region of sea having maximum productivity is
Answer» COASTAL continental SHELF water level deep SEA very deep sea Answer :B

Discussion

4821.	Question :The region of land where specially animals are protected from all types of exploitations and disturbances is called :
Answer» WILDLIFE safari SACRED GROOVE Wildlife sanctuary National park Answer :C

Discussion

4822.	Question : The region of lung through which blood vessels, nerves enter/exit the lung is
Answer» hilum cardiac NOTCH MEDIASTINUM ALVEOLI ANSWER :A

Discussion

4823.	Question : The region of biosphere reserve, which is legally protected and where no human activity is allowed is known as
Answer» CORE zone BUFFER zone TRANSITION zone restoration zone Solution :core zone

Discussion

4824.	Question : The region of attachment of chromosomes to.spindle fibres is called_____
Answer» ANSWER :KINETOCHORE

Discussion

4825.	Question : The region of antibody that recognises the antigen is called :-
Answer» Paratope Epitope `F_(C)-`PART Hapten Answer :A

Discussion

4826.	Question : The _______ region of a leech consists of 12th -22nd segments.
Answer» CEPHALIC clitellar pre-clitellar middle Answer :D

Discussion

4827.	Question : The region consisting of long and severe winters and grwoting season consisting of few months of summers constitutes.
Answer» Savannah ecosystem Tiaga ecosystem TUNDRA ecosystem None of the above Solution :Tundra biome is characterised by DESERT like levels of precipitation (less than 25cm ANNUALLY). EXTREMELY long and cold writers and short WARMER summers.

Discussion

4828.	Question : The regeneration of whole plants from any part of the plant grown under sterile conditions is called tissue culture .the capacity to generate a whole plant from any plant cell is ….......
Answer» ANSWER :TOTIPOTENCY

Discussion

4829.	Question : The reduction in pollution after 1956 is now correlated with
Answer» REVERSE evolution progressive evolution megaevolution microevolution Answer :A

Discussion

4830.	Question : The reduction of nitrite to ammonia during nitrate assimilation is carried out by
Answer» AMINO TRANSFERASE and Mg nitrogenase and Zn nitrite REDUCTASE and Mn nitrite reductase and ferrodoxin Answer :A

Discussion

4831.	Question : The reduced ……….. Transfers the de-energized electrons to the reaction centre of PS I.
Answer» plastoquinone plastocyanin coenzyme quinone cytochrome Answer :B

Discussion

4832.	Question : The reduced or rudimentary and non functional organs in the organisms are known
Answer» HOMOLOGOUS organs Analogous organs Vestigial organs Atavistic organs Answer :C

Discussion

4833.	Question : The red colour of beet root is due to:
Answer» CHLOROPLAST Chromoplast Leucoplast Betalain Answer :B

Discussion

4834.	Question : The recombination frequency between homologous chromosomes never exceed beyond
Answer» 0.5 0.75 1 0.85 Answer :A

Discussion

4835.	Question : The recongnition sites of Salt is
Answer» GTCGAC CCCGGG GAA TTC GG ATCC ANSWER :a

Discussion

4836.	Question : The recognition sequencesof restriction enzyme 'A' is GGCC and that of 'B' is GAATTC. Which statement among the following is true regarding the probable frequency of cutting sides in a genome.
Answer» Both A and B cut EQUALLY frequently A cuts once every 676 nucleotides and B 1024 nucleotides A cuts once every 256 nucleotides and 4096 nucleotides A cuts once every 256 nucleotides and B 1024 nucleotides Solution :There are four nucleotides, i.e. A, T, G and C. In case of A enzyme, it is four nucleotides sequences cutter. Therefore, the probable FREQUENCY of fragments produced by A is `4^(4) = 256` Nucleotides. Similarly, with B enzyme, the NUMBER of nucleotides. Similarly by it is `4^(6) = 1024` nucleotides. THus, A cut (s) at every 256 nucleotides and B produces cut at 1024 nucleotides in sequences.

Discussion

4837.	Question : The recombinant DNA technological process have made immense impact in the area of health care. How Eli Lilly Produced Insulin?
Answer» Solution :Eli Lilly prepared two DNA sequences corresponding to A and B chains of human INSULIN. Introduced them in plasmids of E. COLI to PRODUCE insulin chain. Chain A and B were produced separately. These separately prepared chains were extracted and combined by creating disulfide bonds to FORM himan insulin.

Discussion

4838.	Question : The receptors present on skin which sensitive to coldare
Answer» Ruffinl's CORPUSCLE KRAUSE's corpuscle FREE NERVE endings Answer :C

Discussion

4839.	Question : The recessive genes which are responsible for colour blind are present in____arm of X-chromosome.
Answer» ANSWER :Q

Discussion

4840.	Question : The receptors for soun d waves are present on
Answer» ORGANS of Corti Reissner's membrane SEMICIRCULAR canals SACCULUS. Answer :A

Discussion

4841.	Question : The receptor molecule in plants that respond to changes in light is
Answer» Phytochrome Cytochrome Ferredoxin Chloroplast Answer :A

Discussion

4842.	Question : The recapitulation theory means that:
Answer» All organisms START as an egg Life HISTORY of an organism reflects its EVOLUTIONARY history Non LIVING matters form life Progeny resembles parents Answer :B

Discussion

4843.	Question : The reason of presence of free oxygen into the earth's atmosphere, whereas there was no free oxygen at the time of origin of life is
Answer» Catalytic ACTIVITY of animals Photosynthetic activity of plants Heating of the EARTH NONE of the above Answer :B

Discussion

4844.	Question : The reasons for biodiversity conservation are :
Answer» BROADLY UTILIZATION NARROWLY utilization Ethical All of the above SOLUTION :All of the above

Discussion

4845.	Question : The reason that primitive atmosphere of the earth did not show any degradationis
Answer» Reducing nature High TEMPERATURE UV rays Rainfall ANSWER :A

Discussion

4846.	Question : The reactions of TCA cycle occur in:
Answer» Ribosomes Grana Mitochondria Endoplasmic reticulum Answer :C

Discussion

4847.	Question : The reactions of photosynthesis make up a biochemical pathway. Explain how the biochemical pathway of photosynthesis recycles many of its own reactions and identify the recycled reactants.
Answer» Solution :The ATP and `NADPH_2` are generated during light reaction of photosynthesis. (i) They help in reduction of CARBON dioxide to carbohydrates and during the process they are converted to ADP and NADP. (ii) They are sent back to the GRANA of chloroplast to form ATP and `NADPH_2`. (iii) Similarly the `CO_2` from the atmosphere is said to be fixed by a `CO_2` acceptor molecule. (IV) During successive reactions the carbon of `CO_2` is used for formation of glucose and the original acceptor molecule is recycled so that it can again help in `CO_2` fixation. (v) WATER is split during light reaction and oxygen is produced as a by-product. (VI) At the same time water is again released as a by-product of dark reaction. (vii) Thus many molecules such as ATP, `NADPH_2`, water, `CO_2` acceptor molecules are recycled during the biochemical pathway of photosynthesis.

Discussion

4848.	Question : The reaction that forms a link between krebs' cycle and glycosis is
Answer» OXIDATIVE DECARBOXYLATION of pyruvate Warbing reaction Oxaloacetate oxidation Reduction Reaction Solution :NA

Discussion

4849.	Question :The reaction that is responsible for the primary fixation of CO_2is catalysed by
Answer» RUBP CARBOXYLASE PEP Carboxylase RuBP Carboxylase andPEP Carboxylase PGA synthase Answer :C

Discussion

4850.	Question : The reaction centre of P. S. II is ........
Answer» chl-a, 700 chl-a, 680 chl-a, 673 chl-a, 650 Answer :B

Discussion

Explore topic-wise InterviewSolutions in .

Question : The residue left after methane production from cattle dung is :

Question : The reservoir for the gaseous type of bio-geo chemical cycle exists in:

Question : The reptiles , like dinosaurs were dominant in ......period.

Question :The repressor in case of lac operon will bind in absence of lactose :

Question : The "repeating unit" of glycogen is

Question : The removal of introns from the RNA is called ……… .

Question : The renal portal system of vertebrates is significant for

Question : The releasing hormones are produced by

Question : The relaxin secreted by placenta relaxes the pubic ligaments during parturition.i. Mention the other hormones secreted by placenta. ii. Suppose relaxin is not secreted, mention the other method for the delivery of the child.

Question : The relationship when one species is harmed and other remain unaffected :

Question : The relative fitness of different types within a population is probably

Question : The relationship between two organisms in which one obtains some benefit and other is neither benefited nor harmed.

Question : The relationshipbetweentwoorgansimsin whichone obtainssome benefit at the expense ofthe otheris called.

Question : The relation ship between sucker fish and shark is ......... .

Question : The relation between species richness and area is described on a logarithmic scale by the equation [where S = species richness, A = area, Z = slope of the line (regression coefficient ), C= Y - intercept]

Question : The regulatory genes are located

Question : The rejection of organ transplanting in humans is prevented from

Question : Fill in the blank: The region of Biosphere Reserve which is legally protected and where no human activity is allowed is known as ___________.

Question :The region of the spectrum, which does not cause photoperiodic induction is

Question : The region of sea having maximum productivity is

Question :The region of land where specially animals are protected from all types of exploitations and disturbances is called :

Question : The region of lung through which blood vessels, nerves enter/exit the lung is

Question : The region of biosphere reserve, which is legally protected and where no human activity is allowed is known as

Question : The region of attachment of chromosomes to.spindle fibres is called_____

Question : The region of antibody that recognises the antigen is called :-

Question : The _______ region of a leech consists of 12th -22nd segments.

Question : The region consisting of long and severe winters and grwoting season consisting of few months of summers constitutes.

Question : The regeneration of whole plants from any part of the plant grown under sterile conditions is called tissue culture .the capacity to generate a whole plant from any plant cell is ….......

Question : The reduction in pollution after 1956 is now correlated with

Question : The reduction of nitrite to ammonia during nitrate assimilation is carried out by

Question : The reduced ……….. Transfers the de-energized electrons to the reaction centre of PS I.

Question : The reduced or rudimentary and non functional organs in the organisms are known

Question : The red colour of beet root is due to:

Question : The recombination frequency between homologous chromosomes never exceed beyond

Question : The recongnition sites of Salt is

Question : The recognition sequencesof restriction enzyme 'A' is GGCC and that of 'B' is GAATTC. Which statement among the following is true regarding the probable frequency of cutting sides in a genome.

Question : The recombinant DNA technological process have made immense impact in the area of health care. How Eli Lilly Produced Insulin?

Question : The receptors present on skin which sensitive to coldare

Question : The recessive genes which are responsible for colour blind are present in____arm of X-chromosome.

Question : The receptors for soun d waves are present on

Question : The receptor molecule in plants that respond to changes in light is

Question : The recapitulation theory means that:

Question : The reason of presence of free oxygen into the earth's atmosphere, whereas there was no free oxygen at the time of origin of life is

Question : The reasons for biodiversity conservation are :

Question : The reason that primitive atmosphere of the earth did not show any degradationis

Question : The reactions of TCA cycle occur in:

Question : The reactions of photosynthesis make up a biochemical pathway. Explain how the biochemical pathway of photosynthesis recycles many of its own reactions and identify the recycled reactants.

Question : The reaction that forms a link between krebs' cycle and glycosis is

Question :The reaction that is responsible for the primary fixation of CO_2is catalysed by

Question : The reaction centre of P. S. II is ........