24277 + Interview Questions in Biology in Class 12 Page 304 InterviewSolution

15151.	Question : In the leaf A and B what is the value of AGR (average growth rate) and RGR (relative growth rate)
Answer» 1 2 3 4 Answer :C

Discussion

15152.	Question : In ________the leaf base expands into a sheath covering the stem partially or wholly.
Answer» monocots dicots CHINA ROSE LEGUMINOUS PLANTS ANSWER :A

Discussion

15153.	Question : In the Lac operon system, beta -galactosidase is coded by
Answer» a-gene i-gene l-gene z-gene Answer :D

Discussion

15154.	Question :In the lac operon, the structural genes are switched off when
Answer» REPRESSOR BINDS to the operator repressor binds to the PROMOTOR repressor binds to the REGULATOR repressor binds to the inducer ANSWER :A

Discussion

15155.	Question :In the Lac Operon system, beta-galactosidase is coded by
Answer» a-gene i-gene l-gene z-gene Answer :D

Discussion

15156.	Question : In the hybrid species of maize whose proportion is double than today.s maize?
Answer» LUCENE and TRYPTOPHAN LYSINE and tryptophan Grysine and tryptophan Isolueine and tryptophan SOLUTION :Lysine and tryptophan

Discussion

15157.	Question : In the immune system, interferons are a part of
Answer» PHYSIOLOGICAL BARRIES CELLULAR barriers Physical barriers Cytokine barriers Solution :Physiological barries

Discussion

15158.	Question : In the human-induced process called acid precipitation, the main biogeochemical cycles that are altered are the _____ cyucles and one effect in lakes is to ____ population of nitrifying bacteria.
Answer» phosphorus and NITROGEN, decrease nitrogen and sulphur, decrease nitrogen and sulphur, increase phosphorus and sulphur, decrease Solution :Acid rain or acid precipitation is rainfall and other forms of precipition with a pH of less than 5. Acid rain is caused by large scale emission of acidic GASES into the atmosphere from thermal power plants, industries and automobiles. The common ones are sulphur dioxide, nitrogen oxides `(NO_(X))`, volatile organic (VOCs) and hydrogen chloride. Sulphur dioxide and nitrogen oxides are changed in the atmosphere into sulphuric aci9d and nitric acid by combining with oxygen and water. When such rain FALLS on land, it acidifies the soil and water. Nitrifying bacterial populations and thereby densities decrease in acid stressed water and soil.

Discussion

15159.	Question : In the human female, menstruation can be deferred by the administration of
Answer» COMBINATION of FSH and LH combination of ESTROGEN and PROGESTERONE FSH only LH only Answer :B

Discussion

15160.	Question : in the human female, menstruation can be deferred by the administration of:
Answer» FSH only LH only combination of FSH and LH combination of ESTROGEN and PROGESTERONE ANSWER :D

Discussion

15161.	Question : In the homeostatic control of blood sugar level , which organs function as modulator and effector respectively ?
Answer» LIVER and ISLET of LANGERHANS Hypothalamus and liver Hypothalamus and islet of Langerhans Islet of Langerhans and hypothalamus Answer :C

Discussion

15162.	Question : In grass family, the cotyledon is called:
Answer» Scutellum Proembryo Procambium Dermatogen Answer :A

Discussion

15163.	Question : In the Hatch & Slack cycle, the enzyme required to convert pyruvate into phosphoenol pyruvate is
Answer» Pyruvate DEHYDROGENASE PEP carboxylase PHOSPHOENOL pyruvate dikinase Phosphoenol pyruvate kinase Answer :C

Discussion

15164.	Question : In the given statements I-VI I. The most abundant enzyme in the world. II. Its active site can bind to both CO_(2) and O_(2) hence the name. III. Has a much greater affinity for CO_(2) than O_(2) IV. The relative conc. of O_(2) and CO_(2) determines which of two will bind to the enzyme. V. It is present in all photosynthetic plants. VI. It is present in chloroplast. The above facts are characteristic of which enzyme?
Answer» PEPCase RuBisCo Hexokinase Nitrogenase Answer :B

Discussion

15165.	Question : In the given process of separation and isolation of DNA fragments,some of the steps are missing,Complete the missing stepsA: Restriction digestion of DNA fragments darr B: ……………………darrC: Staining with ethidium bromidedarrD: Visualisation in U.V. lightdarr E: ............darrF: Purification of DNA fragments.
Answer» SOLUTION :B-Gel ELECTROPHORESIS E-Elution

Discussion

15166.	Question : In the given pedigree, find out the shaded symbols indicate whether the trait is dominant or recessive :
Answer» DOMINANT Recessive Co-dominant May be dominant or recessive Answer :D

Discussion

15167.	Question : In the given pedigree chart, the trait shown is
Answer» AUTOSOMAL DOMINANT Autosomal recessive X-linked Y-linked ANSWER :C

Discussion

15168.	Question : In the given four statements (a-d), select the options which includes all the correct ones only:- (a) Fibroblast cells are undifferentiated cells of connective tissue proper. (b) Plasma cells secretes Histamine in small quantity (c) Multilocular adipocytes form white fat (d) Dust cells are macrophages of lungs
Answer» ANSWER :D

Discussion

15169.	Question : In the given list, how many animals are oviparous:- Neophron, Balaenoptera, Bufo, Naja, Pteropus, Scoliodon, Hippocampus, Felis, Corvus, Hemidactylus.
Answer» 4 5 6 7 Answer :C

Discussion

15170.	Question : In the given flow diagram , the replication of retrovirus in a host cell is shown. Examine it and anwer the following questions.(a) Why is virus called retrovirus?(b) Fill in the blank (1) and (2) (c)Can infected cell survive while viruses are being replicated and realesed by host cell?
Answer» SOLUTION :(a) HIV has RNA GENOME. It produces DNA by reverse transcription. (b) 1: Viral DNA is produced by reverse transcriptase. 2: New Viral RNA is produced by the infected cell. © Infected cell can survive.

Discussion

15171.	Question : In the given formula, what dose "a" represent ? Formula : (##MBD_SUS_BIO_XII_P02_UO5_C14_E02_046_Q01.png" width="80%">
Answer» energyobtaind through PRIMARY producer biomss at own level biomss at lower TROPHIC level energy OBTAINED through food Answer :D

Discussion

15172.	Question : In the given figure,one cycle of polymerase chain reaction (PCR) is shown: (a) Name the steps A,B and C.
Answer» Solution :(A) Denaturation : HEAT DENATURES DNA to SEPARATE COMPLEMENTARY strands.

Discussion

15173.	Question : In the given figure,one cycle of polymerase chain reaction (PCR) is shown: (c ) State the contribution of Thermus aqaticus in this process.
Answer» SOLUTION :(C ) Thermus aquaticus : This enzyme INDUCES DENATURATION of DOUBLE stranded DNA at high TEMPERATUR.

Discussion

15174.	Question : In the given figure,one cycle of polymerase chain reaction (PCR) is shown: (b) Give the purpose of each of these steps.
Answer» Solution :(B) Annealing : Primers hybridises to the DENATURED DNA STRANDS

Discussion

15175.	Question : In the given figure of human tooth, some parts are labeled as A, B, C and D. Identify these parts and match them with their description given below. (i) Contains dentine producing cells (ii) 70% mineral matter, mainly calcium (iii) Hardest material in the body (iv) Connects rooi to the jawbone
Answer» ANSWER :D

Discussion

15176.	Question : In the given figure of strawberry fruit, identify A and B
Answer» A- Mesocarp B- DRUPE A- Thalamus, B-Achene A- Thalamus, B- Pome A- ENDOCARP B-Pome Answer :B

Discussion

15177.	Question : In the given figure. Identify the grassland and coniferous fore st respec tively fro m the marking A–F and select the correct option :-
Answer» A and B B and E B and D D and E Answer :B

Discussion

15178.	Question : In the given figure, give the name and functions of parts labelled A and B.
Answer» SOLUTION :A = Trophoblast - gest attached to endometrium and DRAWS nutritive material material secreted by uterine endometrium GLAND. B = Inner cell mass - DIFFERENTIATES as Embryo.

Discussion

15179.	Question : In the given figure identify, through which structure they propagates ?
Answer» Solution :(a) Eyes of POTATO (B) Rhizome of Ginger (c ) Bulbil of Agabe (d) Leaf buds of BRYOPHYLLUM (e ) Offset of water HYACINTH.

Discussion

15180.	Question : in the given figure, From (A) and from(B) resreesents differt from of a proteninaceous hormone secretred by pancreas in mammals.(c) Explain how was this hormonr produced by Eli Lilly, an american company using rDNA technology.
Answer» Answer :(c) Eli-lilly company PREPARED two DNA sequences corresponding to A and B peptide chains of human INSULIN and introduced them in plasmid E coli to produse insulin chains. Chains A and B were produced separately, extracted and combined by CREATING disulphide bonds to form insulin.

Discussion

15181.	Question : in the given figure, From (A) and from(B) resreesents differt from of a proteninaceous hormone secretred by pancreas in mammals.(b) What are these From(a) anf from(b)? How these froms differ from each other?
Answer» Answer :(b) from (A) : PROINSULIN from (B) : MATURE insulin.Proinsulin CONTAINS an extra stretch called c- peptide which is ABSENT in mature insulin.

Discussion

15182.	Question : in the given figure, From (A) and from(B) resreesents differt from of a proteninaceous hormone secretred by pancreas in mammals.(a) Name the hormone. What type of bonding is present betwwn chains of this hormone?
Answer» ANSWER :(a) INSULIN DISULPHIDE BONDS

Discussion

15183.	Question : In the given figure, Agrobacterium is utilized for the producation of a transgenic crop. Explain the steps a,b,c,d and e shown in the figure.
Answer» Answer :step (a) plasmid is removed and CUT open with restrictstep (e) agrobecterium based transformation.ion endonuclease. (B) gene of interest is isolated from another ORGANISM and AMPLIFIED using PCR step (C) new gene is intersted into plasmid step (d) plasmid is put back into agrobacterium

Discussion

15184.	Question : In the given figure 1 of a dicot embryo, label the parts (A) and (B) and give their function.
Answer» SOLUTION :A = PLUMULE - To FORM shoot system B = Cotyledons - STORAGE of food

Discussion

15185.	Question : In the given expressionL_1 = L_0 + rtr-refers to
Answer» GROWTH rate. exponential index unit time initial growth. Answer :A

Discussion

15186.	Question :In the given examples, choose the examples of primary meristem :- Apical meristem, cork cambium, Intercalary meristem, interfascicular cambium
Answer» 2 3 4 1 Answer :A

Discussion

15187.	Question : In the given diagram, write the names of parts shown with lines.
Answer» Solution :The embryo of monocot plants has only one cotyledon. In grass family it is called SCUTELLUM which is located at one side of embryonal axis. At its lower end the embryonal axis has the radical and root cap enclosed in an undifferentiated SHEATH called coleorrhiza. The PORTION of the embryonal axis above the level of attachment of scutellum is the epicotyl. Epicotyl has a SHOOT apex and a few leaf primordia enclosed in a hollow foliar STRUCTURE, the coleoptile

Discussion

15188.	Question : In the given diagram which diversity represent by A, B, and C
Answer» A `to beta`-diversity B `to alpha` diversity C`togamma` diversity `A to GAMMA` diversity B`tobeta` diversity C`to APLHA` diversity A `to alpha`-diversity C`to beta`-diversity A `toalpha` diversity B `to beta` diversity C`to gamma` diversity Answer :D

Discussion

15189.	Question : In the given diagram, select the option which contains all the wrong labellings :-
Answer» Wernike's AREA, BROCA's area, CENTRAL SULCUS Premotor area, somesthetic areaparieto-occipetal Visual area, central sulcus, somesthetic area Somesthetic area, Broca's area, parieto occipetal sulcus Answer :D

Discussion

15190.	Question :
Answer» A& B B & D C & D E & F Answer :B

Discussion

15191.	Question : In the given diagram, parts labelled as 'A', 'B', 'C', 'D', 'E' and 'F' are respectively identified as
Answer» synergids, POLAR NUCLEI CENTRAL cell, antipodal cell, filiform apparatus and egg polar nuclei egg, antipodal cell, central cell, filiform apparatus and synergids egg, synergids, central cell, filiform apparatus, antipodal cell and polar nuclei central cell, polar nuclei, filiform apparatus antiopodal cell, synergids and egg Answer :A

Discussion

15192.	Question : In genetic codedictionary codons used to code for all the 20essential amino acids are :
Answer» 64 61 60 20 Answer :B

Discussion

15193.	Question : In the frontal lobe of cerebral hemisphere there is ……….. .
Answer» AUDITORY area Wernicke's area Broca's area pituitary Answer :C

Discussion

15194.	Question : In the following table ' X " is formed by the division or branching of 'Y ' which one is an exception ? {:(,'X','Y'),(A,"Arteriole","Artery"),(B,"Capillary","Arteriole"),(C,"Venule","Vein"),(D,"Renal Artery","Aorta"):}
Answer» A B C D Answer :C

Discussion

15195.	Question : In the formula dN//dt = rN, 'r" represents what?
Answer» SOLUTION :The .R. represents .intrinsic RATE of NATURAL INCREASE..

Discussion

15196.	Question : In the following statements, one word per statement is underlined. This word can be changed to obtain the correct statement. In which one it should not be changed?
Answer» In the living world `ul("all")` organisms have DNA as the GENETIC material which can be transmitted from one generation to ANOTHER. Purine pyrimidine ratio in Ribose Nucleic Acid can `ul("NEVER")` be EQUAL to 1. The 3rd carbon atom and the 5th carbon atom of `ul("all")`nucleotides in DNA are involved in the formation of phosphodiester bond. Monocyclic nitrogen bases `ul("always")` FORM weak hydrogen bonds with dicyclic nitrogen bases in B - DNA. Answer :D

Discussion

15197.	Question : In the following stage oogonia stop their division and enter into prophase - I of meiotic division
Answer» PRIMARY oocyte Secondary oocyte Tertiary oocyte Ootid Answer :A

Discussion

15198.	Question :In the following question, select the related letters from the given alternatives. ACD : ZXW : : PMN : ?
Answer» LMN MPN KOP KNM Answer :D

Discussion

15199.	Question : In the following question, find the missing number for the given series. 87, 62, 42, 27, 17, ?
Answer» 7 12 8 10 Answer :B

Discussion

15200.	Question : In the following pie chart of global vertebrates diversity,what does A,B and C represent respectively?
Answer» BIRDS, FISHES, Amphibians Mammals, Reptilies, Birds Fishes,Birds,Amphibians Amphibians,Fishes,Reptlies Answer :C

Discussion

Explore topic-wise InterviewSolutions in .

Question : In the leaf A and B what is the value of AGR (average growth rate) and RGR (relative growth rate)

Question : In ________the leaf base expands into a sheath covering the stem partially or wholly.

Question : In the Lac operon system, beta -galactosidase is coded by

Question :In the lac operon, the structural genes are switched off when

Question :In the Lac Operon system, beta-galactosidase is coded by

Question : In the hybrid species of maize whose proportion is double than today.s maize?

Question : In the immune system, interferons are a part of

Question : In the human-induced process called acid precipitation, the main biogeochemical cycles that are altered are the _____ cyucles and one effect in lakes is to ____ population of nitrifying bacteria.

Question : In the human female, menstruation can be deferred by the administration of

Question : in the human female, menstruation can be deferred by the administration of:

Question : In the homeostatic control of blood sugar level , which organs function as modulator and effector respectively ?

Question : In grass family, the cotyledon is called:

Question : In the Hatch & Slack cycle, the enzyme required to convert pyruvate into phosphoenol pyruvate is

Question : In the given pedigree, find out the shaded symbols indicate whether the trait is dominant or recessive :

Question : In the given pedigree chart, the trait shown is

Question : In the given list, how many animals are oviparous:- Neophron, Balaenoptera, Bufo, Naja, Pteropus, Scoliodon, Hippocampus, Felis, Corvus, Hemidactylus.

Question : In the given flow diagram , the replication of retrovirus in a host cell is shown. Examine it and anwer the following questions.(a) Why is virus called retrovirus?(b) Fill in the blank (1) and (2) (c)Can infected cell survive while viruses are being replicated and realesed by host cell?

Question : In the given formula, what dose "a" represent ? Formula : (##MBD_SUS_BIO_XII_P02_UO5_C14_E02_046_Q01.png" width="80%">

Question : In the given figure,one cycle of polymerase chain reaction (PCR) is shown: (a) Name the steps A,B and C.

Question : In the given figure,one cycle of polymerase chain reaction (PCR) is shown: (c ) State the contribution of Thermus aqaticus in this process.

Question : In the given figure,one cycle of polymerase chain reaction (PCR) is shown: (b) Give the purpose of each of these steps.

Question : In the given figure of strawberry fruit, identify A and B

Question : In the given figure. Identify the grassland and coniferous fore st respec tively fro m the marking A–F and select the correct option :-

Question : In the given figure, give the name and functions of parts labelled A and B.

Question : In the given figure identify, through which structure they propagates ?

Question : in the given figure, From (A) and from(B) resreesents differt from of a proteninaceous hormone secretred by pancreas in mammals.(c) Explain how was this hormonr produced by Eli Lilly, an american company using rDNA technology.

Question : in the given figure, From (A) and from(B) resreesents differt from of a proteninaceous hormone secretred by pancreas in mammals.(b) What are these From(a) anf from(b)? How these froms differ from each other?

Question : in the given figure, From (A) and from(B) resreesents differt from of a proteninaceous hormone secretred by pancreas in mammals.(a) Name the hormone. What type of bonding is present betwwn chains of this hormone?

Question : In the given figure, Agrobacterium is utilized for the producation of a transgenic crop. Explain the steps a,b,c,d and e shown in the figure.

Question : In the given figure 1 of a dicot embryo, label the parts (A) and (B) and give their function.

Question : In the given expressionL_1 = L_0 + rtr-refers to

Question :In the given examples, choose the examples of primary meristem :- Apical meristem, cork cambium, Intercalary meristem, interfascicular cambium

Question : In the given diagram, write the names of parts shown with lines.

Question : In the given diagram which diversity represent by A, B, and C

Question : In the given diagram, select the option which contains all the wrong labellings :-

Question :

Question : In the given diagram, parts labelled as 'A', 'B', 'C', 'D', 'E' and 'F' are respectively identified as

Question : In genetic codedictionary codons used to code for all the 20essential amino acids are :

Question : In the frontal lobe of cerebral hemisphere there is ……….. .

Question : In the following table ' X " is formed by the division or branching of 'Y ' which one is an exception ? {:(,'X','Y'),(A,"Arteriole","Artery"),(B,"Capillary","Arteriole"),(C,"Venule","Vein"),(D,"Renal Artery","Aorta"):}

Question : In the formula dN//dt = rN, 'r" represents what?

Question : In the following statements, one word per statement is underlined. This word can be changed to obtain the correct statement. In which one it should not be changed?

Question : In the following stage oogonia stop their division and enter into prophase - I of meiotic division

Question :In the following question, select the related letters from the given alternatives. ACD : ZXW : : PMN : ?

Question : In the following question, find the missing number for the given series. 87, 62, 42, 27, 17, ?

Question : In the following pie chart of global vertebrates diversity,what does A,B and C represent respectively?

Question : In the human-induced process called acid precipitation, the main biogeochemical cycles that are altered are the _ cyucles and one effect in lakes is to population of nitrifying bacteria.