24277 + Interview Questions in Biology in Class 12

1.	Question : The scar left by function in the seed is
Answer» tegmen radicle epicotyl hilum

Discussion

2.	Question : The satellitevirus of subterraneanclover mottle virus is
Answer» HELPER luteovirus helper napovirus dependovirus helper sobemovirus Answer :D

Discussion

3.	Question :The sample for amniocentesis is taken from which of the following ?
Answer» UTERUS Developing EMBRYO Amniotic BAG All of the above ANSWER :C

Discussion

4.	Question : The salt concentration (measured as salinity in parts per thousand) is ____ in inland water.
Answer» 20-30 Less than 5 30-35 35-100 Answer :B

Discussion

5.	Question : The same hormone can be known by various names given in which set
Answer» SECRETIN ,enterokinin,GASTRIN Gametokinetic FACTOR ,TESTOSTERONE,LTH ADH,Pitressin,and vasopressin Oxytocin ,tri-iodo=thyronine,thyroxine Answer :C

Discussion

6.	Question :The salt concentration (measured as salinity in part per thousand) of in land water is :
Answer» LESS than 5% 30-35% more than 5% 1 Answer :A

Discussion

7.	Question : The salt concentration is 30 -35 ( salinity in parts per thousand ) in
Answer» INLAND water sea hypersaline lagoons estuaries ANSWER :B

Discussion

8.	Question : The salivary glands that are located at the angle of the lower jaw are
Answer» Parotid gland Sublingual glands Submandibular gland both (1) & (2) Answer :C

Discussion

9.	Question : The salinity of the oceans is
Answer» INCREASING DECREASING CONSTANT Decreasing now but was increasing in PAST ANSWER :d

Discussion

10.	Question :The ' sacred groves ' or ' island of Pristine forests ' of India are :
Answer» ARAVALLI Hills of RAJASTHAN and Khasi , Jaintia Hills of Maghalaya of Western Ghat , regions of MAHARASTRA and Karnataka Sarguja , CHANDA and Bastar region of Madhya Pradesh All of these Answer :D

Discussion

11.	Question : The rupture and fractionation don't usually occur in the water column in vessel/tracheids during the ascent of sap because of:
Answer» WEAK GRAVITATIONAL pull Transpiration pull Lignified THICK walls Cohesion and adhesion Answer :D

Discussion

12.	Question : The R.Q. is less than 1.0 in a respiratory metabolism, it would mean that:
Answer» Carbohydrates are used as RESPIRATORY SUBSTRATE Organic acids are used as respiratory substrate The oxidation of the respiratory substrate consumed more OXYGEN than the AMOUNT of `CO_2`released The' oxidation of the respiratory substrate consumed less oxygen than the amount of `CO_2` released Answer :C

Discussion

13.	Question : The rupture and fraction do not usually occur in the water column in vessel/tracheids during the ascent of sap because of
Answer» WEAK gravitatinal pull transpirational pull lignified THICK walls cohesion and adhesion Answer :D

Discussion

14.	Question : The roots which arise from parts of the plant other than the radicle are called
Answer» CONICAL roots Adventitious roots Tap roots Pneumatophores Answer :A

Discussion

15.	Question : The roots in gymnosperms are generally "_________" roots and in Cycas small specialised roots called "______" are associated with N_(2) fixing cyanobacteria.
Answer» ADVENTITIOUS, CORALLOID ROOTS top,coralloid roots adventitious, mycorrhizal roots TAP, haustorial roots Answer :B

Discussion

16.	Question : The root nodules formed by leguminous plants have a red pigment called________.
Answer» Haemoglobin Phycocanin Leghaemoglobin Anthocyanin Answer :C

Discussion

17.	Question : The root cell of wheat plant has 42 chromosomes. What would be the number of chromosomes in the synergid cell ?
Answer» 7 14 21 28 Answer :C

Discussion

18.	Question : The roof of cerebrum is
Answer» centrocoel pallium arbor vitae third ventricle Answer :B

Discussion

19.	Question : The roof of the cranium of frog is formed by
Answer» parasphenoid alisphenoid frontoparietal orbitosphenoid Solution :Dorsal part of the cranium is formed of tow large and flat frontoparietals which are articulated together by a mid dorsal sagittal suture together and are COLLECTIVELY called frontoparietal. Endo-frontoparietal consists of a frontal BONE (in front) and a parietal bone (behind). But noe it has been proved that it is only the frontal bone, the parietals are not PRESENT in FROG due to the ABSENCE of neck.

Discussion

20.	Question : The root cap is not used in absorption of water due to:
Answer» PRESENCE of ROOT hairs Absence of root hairs Its presence in ELONGATION zone none of these Answer :B

Discussion

21.	Question : The role of DNA ligase in the construction of a recombinant DNA molecule is
Answer» Formation of phosphodiester bond between TWO DNA fragments Formation of hydrogen BONDS between sticky ends of DNA fragments Ligation of all purine and pyrimidine bases None of the above Solution :Formation of phosphodiester bond between two DNA fragments The role of DNA ligase in the construction of a RECOMBINANT DNA molecule is formation of phosphodiester bond between two DNA fragments. It seals the GAP between the DNA fragments. DNA ligase is ALSO called as molecular glue.

Discussion

22.	Question : The roght and spiny ringd of artocarpus integrifolia (jack fruit ) fruit is formed as a result of
Answer» ADHESION of STIGMAS COHENSION of stigmas adhesion of STAMENS COHESION of stamens Answer :D

Discussion

23.	Question : The rods and cones of the eye retinal layer are modified :-
Answer» Hair Unipolar neurons Bipolar neurons Multipolar neurons Answer :C

Discussion

24.	Question : The RNAi stands for
Answer» RNA inactivation RNA INITIATION RNA INTERFERENCE RNA INTERFERON SOLUTION :RNA interference

Discussion

25.	Question : The RNA polymerase of prokaryotes binds with………………….. actor to initiate polymerization.
Answer» (a) RHO (B) THETA (C) SIGMA (d) psi Solution :sigma

Discussion

26.	Question : The RNA polymerase holoenzyme transcribes :
Answer» The PROMOTER , STRUCTURAL GENE and the TERMINATOR region The promoter and the terminator region The structural gene and the terminator region The structural gene only Answer :A

Discussion

27.	Question : The RNA polymerase holoenzyme transcribes
Answer» the PROMOTER, STRUCTURAL GENE and the TERMINATOR region the promoter and the terminator region the structural gene and the terminator region the structural gene only. Answer :d

Discussion

28.	Question : The ring of hygroscopic teetharoundthe mouth of dehiscentcapsule in mosses is called
Answer» PERISTOME DEPENDENT APOPHYSIS trabeculae Answer :A

Discussion

29.	Question : The rights given to a person over the creation of their mind is(A) Right of admission(B) Intelligent personality(C) Intellectual property(D) Intelligent proprietors
Answer» RIGHT of admission INTELLIGENT PERSONALITY Intellectual property Intelligent PROPRIETORS Solution :Intellectual property

Discussion

30.	Question : The right auricle opens into the right ventricle by ________ aperture in rabbit.
Answer» SOLUTION :RIGHT auriculoventiricular

Discussion

31.	Question : The right and left hemispheres in the brain of a rabbit are connected by ___________ .
Answer» DIENCEPHALON corpus callosum DURAMATER NONE of the above Answer :B

Discussion

32.	Question : The ribozyme acts as a catalyst for the formation of
Answer» ESTER bond hydrogen bond peptide bond phosphodiester bond Answer :C

Discussion

33.	Question : The ribosomal binding loop of tRNA is
Answer» DHU loop anticodon loop T `PSI` , C loop III loop Answer :C

Discussion

34.	Question : The reverse flow of the blood from the left systemic arch or from the pulmonary arch is prevented by
Answer» MITRAL valve Tricuspid valve Semilunar valves Eustachian valve Answer :C

Discussion

35.	Question : The reverse order of nucleotide sequence found in the opposite DNA strands recognized by RE's are called
Answer» PLASMIDS COSMIDS VECTORS PALINDROMES ANSWER :D

Discussion

36.	Question : The retroperitoneal kidney is
Answer» kidney of fish kidney covered by peritoneum on VENTRAL side kidney covered by peritoneum on DORSAL side kidney uncovered by peritorneum on CITHER side Answer :B

Discussion

37.	Question : The result of which of the following reaction experiments carried out by Avery et al. on Streptococcus pneumoniae has proved conclusively that DNA is the genetic material ?
Answer» LIVE 'R' STRAIN `+` DNA from 'S' strain `+` Rnase Live 'R' strain `+` DNA from 'S' strain`+` Dnase Heat killed 'R' strain `+` DNA from 'S' strain `+` Dnase Live 'R' strain `+` DENATURED DNA of 'S' strain `+` protease Answer :B

Discussion

38.	Question : The results of Miller's experiments were discussed in the book 'The Planets' written
Answer» Sayere HAROLD UREY Huxley Stanley SOLUTION :Harold Urey

Discussion

39.	Question : The result of the following reaction/experiment carried out by Avery et al. on streptococcus pneumooiae has proved conclusively that DNA is the genetic material
Answer» Live 'R' strain + DNA from 'S' strain + DNAase Heat KILLED 'R' stain +DNA from 'S' strain + DNAase Live 'R' strain + DNA from 'S' strain + RNAase Live 'R' strain + DENATURED DNA of 'S' strain + prorease Answer :A

Discussion

40.	Question : The results of Miller's experiments were discussed in the book ' The planets' which was written by
Answer» Sayere Harold UREY Huxley STANLEY ANSWER :B

Discussion

41.	Question : The result of Ozone hole is :
Answer» Global warming ACID rain Greenhouse effect The UV radiations REACH the earth Answer :D

Discussion

42.	Question : The restriction ''nuclease inspects'' the length of a DNA sequence special sequence in the DNA recognised by restriction endonuclease is called :
Answer» NUCLEOTIDE sequence nucleoside sequence palindromic nucleotide sequence both (1) and (2) ANSWER :C

Discussion

43.	Question : The resting tension in a muscle is termed
Answer» MUSCLE TWITCH muscle TREMOR muscle TONE muscle FATIGUE Answer :C

Discussion

44.	Question : The respiratory quotient during cellular respiration would depend on the
Answer» Nature of ENZYMES involved Nature of the SUBSTRATE Amount of carbondioxide released Amount of oxygen UTILIZED ANSWER :B

Discussion

45.	Question : Respiratory Quotient
Answer» 0.7 1 0.9 0.1 Answer :B

Discussion

46.	Question : The respiratory quotient during cellular respiration would depend on:
Answer» The AMOUNT of carbon dioxide released The amount of OXYGEN utilised The NATURE of enzymes involved The nature of the substrate Answer :D

Discussion

47.	Question : The respiration of early periods of photosynthesis during illumination is called_____
Answer» ANSWER :PHOTORESPIRATION

Discussion

48.	Question : The residue left after methane production from cattle dung is(A) Burnt(B) Buried in land fills(C) Used as manure(D) Used in civil construction
Answer» Burnt Buried in LAND fills Used as manure Used in civil construction SOLUTION :The raw material is excreta of cattles for PRODUCTION of biogas. The biogas plant is a pit of concrete tank (10-15 feet DEEP) in which bio wastes are collected and a slurry of dung is fed. Gobar (excreta/dung) of cattle is rich in these BACTERIA. Dung can be used for generation of biogas, commonly called gobar gas. The residue left after methane production from cattle dung is used as manure

Discussion

49.	Question : The residual persistent nucellus is known as :
Answer» Perisperm Pericarp Integument None of the these Answer :A

Discussion

50.	Question : The reservoir for the gaseous type of bio-geo chemical cycle exists in
Answer» Stratosphere atmosphere IONOSPHERE lithosphere Solution :Two TREASURES of nutrition are reserve bridge and cyclic bridge. GASEOUS form of nutrients biogeochemical cycles are seen in (NITROGEN and carbon cycle) while Stratosphere, Ionosphere and Lithosphere are PARTS of atmosphere.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Question : The scar left by function in the seed is

Question : The satellitevirus of subterraneanclover mottle virus is

Question :The sample for amniocentesis is taken from which of the following ?

Question : The salt concentration (measured as salinity in parts per thousand) is ____ in inland water.

Question : The same hormone can be known by various names given in which set

Question :The salt concentration (measured as salinity in part per thousand) of in land water is :

Question : The salt concentration is 30 -35 ( salinity in parts per thousand ) in

Question : The salivary glands that are located at the angle of the lower jaw are

Question : The salinity of the oceans is

Question :The ' sacred groves ' or ' island of Pristine forests ' of India are :

Question : The rupture and fractionation don't usually occur in the water column in vessel/tracheids during the ascent of sap because of:

Question : The R.Q. is less than 1.0 in a respiratory metabolism, it would mean that:

Question : The rupture and fraction do not usually occur in the water column in vessel/tracheids during the ascent of sap because of

Question : The roots which arise from parts of the plant other than the radicle are called

Question : The roots in gymnosperms are generally "_________" roots and in Cycas small specialised roots called "______" are associated with N_(2) fixing cyanobacteria.

Question : The root nodules formed by leguminous plants have a red pigment called________.

Question : The root cell of wheat plant has 42 chromosomes. What would be the number of chromosomes in the synergid cell ?

Question : The roof of cerebrum is

Question : The roof of the cranium of frog is formed by

Question : The root cap is not used in absorption of water due to:

Question : The role of DNA ligase in the construction of a recombinant DNA molecule is

Question : The roght and spiny ringd of artocarpus integrifolia (jack fruit ) fruit is formed as a result of

Question : The rods and cones of the eye retinal layer are modified :-

Question : The RNAi stands for

Question : The RNA polymerase of prokaryotes binds with………………….. actor to initiate polymerization.

Question : The RNA polymerase holoenzyme transcribes :

Question : The RNA polymerase holoenzyme transcribes

Question : The ring of hygroscopic teetharoundthe mouth of dehiscentcapsule in mosses is called

Question : The rights given to a person over the creation of their mind is(A) Right of admission(B) Intelligent personality(C) Intellectual property(D) Intelligent proprietors

Question : The right auricle opens into the right ventricle by ________ aperture in rabbit.

Question : The right and left hemispheres in the brain of a rabbit are connected by ___________ .

Question : The ribozyme acts as a catalyst for the formation of

Question : The ribosomal binding loop of tRNA is

Question : The reverse flow of the blood from the left systemic arch or from the pulmonary arch is prevented by

Question : The reverse order of nucleotide sequence found in the opposite DNA strands recognized by RE's are called

Question : The retroperitoneal kidney is

Question : The result of which of the following reaction experiments carried out by Avery et al. on Streptococcus pneumoniae has proved conclusively that DNA is the genetic material ?

Question : The results of Miller's experiments were discussed in the book 'The Planets' written

Question : The result of the following reaction/experiment carried out by Avery et al. on streptococcus pneumooiae has proved conclusively that DNA is the genetic material

Question : The results of Miller's experiments were discussed in the book ' The planets' which was written by

Question : The result of Ozone hole is :

Question : The restriction ''nuclease inspects'' the length of a DNA sequence special sequence in the DNA recognised by restriction endonuclease is called :

Question : The resting tension in a muscle is termed

Question : The respiratory quotient during cellular respiration would depend on the

Question : Respiratory Quotient

Question : The respiratory quotient during cellular respiration would depend on:

Question : The respiration of early periods of photosynthesis during illumination is called_____

Question : The residue left after methane production from cattle dung is(A) Burnt(B) Buried in land fills(C) Used as manure(D) Used in civil construction

Question : The residual persistent nucellus is known as :

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

Question : The roots in gymnosperms are generally "___" roots and in Cycas small specialised roots called "" are associated with N_(2) fixing cyanobacteria.