24277 + Interview Questions in Biology in Class 12 Page 416 InterviewSolution

20751.	Question : Attractants and rewards are required for
Answer» (A) CLEISTOGAMY (B) ANEMOPHILY (C ) ENTOMOPHILY (D) Hydrophily Answer :C

Discussion

20752.	Question : Attractants and rewards are required for(A) anemophily(B) entomophily(B) hydrophily(D) cleistogamy
Answer» anemophily entomophily hydrophily cleistogamy Answer :B

Discussion

20753.	Question : Attempt any TWO of the following : (i) Describe the Wobble hypothesis .
Answer» SOLUTION :Wooble hypothesis was proposed by Francis CRICK in 1966. ACCORDING to this hyprothesis , in codon and anticodon PAIRING the third may not be complementary. The third base of the codon is CALLED Wobble base and this position is called wobble positions. The actual base pairing occurs at first two positions only .

Discussion

20754.	Question : Attempt giving a clear definition of the term species.
Answer» Solution :ACCORDING to Dobzhansky, species are MOSTLY inclusive in MENDELIAN POPULATION, which share the common gene pool. According to Mayr, species are the groups of actually or potentially interbreeding natural population that are reproductivity isolated from other such groups.

Discussion

20755.	Question : Attempt any TWO of the following : Give the diagrammatic representations of ETS.
Answer» SOLUTION :

Discussion

20756.	Question : Attainment of sexual maturity during larval stage in some Urodeles is called______.
Answer» ANSWER :PAEDOGENESIS,

Discussion

20757.	Question : A.T.S. of stem is stained frist with safranin and thenfast green. What would be the color of phloem ?
Answer» Red green orange purple. Answer :B

Discussion

20758.	Question : Atrioventricular valves are opened due to
Answer» DECREASED PRESSURE in aorta Increased pressure in atria Decreased pressure in ventricles Increased pressure in ventricles Answer :C

Discussion

20759.	Question : Atrioventricular groove is also called a ………. .
Answer» FORAMEN ovale ligamentum arteriosum coronary sulcus ductus arteriosus Answer :C

Discussion

20760.	Question : Atrial natriuretic factor (ANF) decreases
Answer» BLOOD pressure SECRETION of RENIN `NA^(+)` secretion Vasodilation. Answer :A

Discussion

20761.	Question : Atrio-ventricular node is present in
Answer» INTERVENTRICULAR septum bundle of His interatrial septum coronary sulcus Answer :C

Discussion

20762.	Question : Atrial and branchial apertures of Herdmania are surrounded by
Answer» TWO LIPS THREE lips Four lips Five lips Answer :C

Discussion

20763.	Question : Atretic follicle is
Answer» Which are not developed COMPLETELY and degenerate Other NAME fo corpus luteum Which EXTRUDED its OOCYTES Graafian follicle Answer :A

Discussion

20764.	Question : ATP.and NADH, are called_____power of photosynthesis
Answer» ANSWER :ASSIMILATORY

Discussion

20765.	Question :ATP synthesis is linked to
Answer» DEVELOPMENT of water potential gradient ACROSS the MEMBRANE. Development of H.. gradient across the membrane Reduction of PS I by `NADP^(+)` Oxidation of PS II by `H_2O` Answer :B

Discussion

20766.	Question : ATP synthesis in chloroplast occurs :-
Answer» In stroma At `CF_(6)` At `CF_(1)` PS-II & PS-I ANSWER :C

Discussion

20767.	Question : ATP responsible for fixing CO_2and synthesis of sugar , is produced in the
Answer» Lumen of thylakoid INSIDE the thylakoid membrane STROMA of CHLOROPLAST CYTOSOL of cell Answer :C

Discussion

20768.	Question : ATP is utilized in which one of these reaction of? C_(3)-Cycle (I) PGArightarrowBis PGA II) Bis PGArightarrowG-3-P G-3-P rightarrow DHAP IV) RUMPrightarrowRUBP
Answer» I,II and IV II, III and IV II and III I and IV Answer :D

Discussion

20769.	Question : ATP molecules required to synthesise one molecule of glucose by C_4 - pathway are
Answer» 12 18 24 30 Answer :D

Discussion

20770.	Question : ATP formation by oxidation of substrates is called_____.
Answer» ANSWER :OXIDATIVE PHOSPHORYLATION

Discussion

20771.	Question : ATP Equivalents,produced during oxidation of catalysed by the enzyme
Answer» 1 2 3 4 Solution :NA

Discussion

20772.	Question : ATP and NADPH_(2) possess the assimilatory power for the reduction of CO_(2) to ……….. During the dark reaction of photosynthesis.
Answer» glucose sucrose fructose maltose Answer :A

Discussion

20773.	Question : ATP-ase activity found in :-
Answer» MYOSIN FILAMENT Actin filament Both None Answer :1

Discussion

20774.	Question : {:((a),"Totipotency ", -, "Gottlieb" ),(,,,"Haberlandt"),((b), "Differentiation " ,-,"Structural changes"),(,,, "of cell "),((c),"Redifferentiation" , -, "Explant "),((d), "Dedifferentiation", -, "Formation of callus" ):}
Answer» ANSWER :(C) REDIFFERENTIATION - EXPLANT

Discussion

20775.	Question : Atomita 2 - rice is a product by ………….. .
Answer» POLYPLOID breeding Hybridization Mutation breeding Clonal selection Answer :C

Discussion

20776.	Question : ________atom of chloro-fluorocarbon degrades ozone.
Answer» ANSWER :C

Discussion

20777.	Question : Atmospheric pressure theory was rejected for the ascent of sap because
Answer» there is no free surface at the lower end of the plant, which is necessary for the OPERATION of atmospheric pressure MAXIMUM height to which water can rise is about 50 m movement of the water is very slow and negligible and it forms only an infinitesimal SMALL fraction of the total this is not useful in ADHERING water to the walls of the xylem elements Answer :B

Discussion

20778.	Question : Atmospheric pressure is measured by
Answer» Psychrometer Tensiometer Manometer Osmometer Answer :A

Discussion

20779.	Question : Atmospheric carbon monoxide concentration becomes harmful at
Answer» 0.5 , 2MM HG 0.4 , 7MM Hg 0.3,5mm Hg 0.1, 0.7 MM Hg Answer :D

Discussion

20780.	Question : Atmosphere of cities and metropolitan cities is polluted most by
Answer» AUTOMOBILE exhausts Pesticide residue Household waste Radioactive FALL out Answer :A

Discussion

20781.	Question : Observe the relationship between the first two terms and fill in the blanks. IR-8 : Rice Atlas 66 : __________
Answer» Solution :Atlas 66, It is a fortified WHEAT, all others are semi-dwarf RICE VARIETIES.

Discussion

20782.	Question : Atlas 66 is the variety of
Answer» wheat Rice maize sorghum Answer :A

Discussion

20783.	Question : a.Through which method do genes for disease resistance is transferred from a related crop to a cultivated variety? b.Give example for a vegetable crop which was transferred by this method. c.Give the name of new variety
Answer» SOLUTION :a.Sexual HYBRIDISATION b.Bhindi/ladies FINGER c.Parbhani KRANTI

Discussion

20784.	Question : Athirappilly-Vazhachal dam construction project is under consideration of Government.As a biology student express your views.
Answer» Solution :The RAPID loss of biodiversities is an important international PROBLEM. The most effective and EFFICIENT mechanism for conserving BIODIVERSITY is to prevent further DESTRUCTION or degradation of habitual by us.

Discussion

20785.	Question : Atlas 66 is a improved variety of ………. .
Answer» Rice Maize Wheat Spinach Answer :C

Discussion

20786.	Question : Athletes are tempted to use anabolic steroids. Why?
Answer» Solution :These steroids INCREASE muscle size, STRENGTH and ENDURANCE of BODY.

Discussion

20787.	Question : Atavistic organs indicate
Answer» CONVERGENT EVOLUTION Parallel evolution The evolution from REMOTE ancestors Homoplasy ANSWER :C

Discussion

20788.	Question : Atavism refers to ..........
Answer» INHERITANCE of TRAIT by mother Inheritance of trait by father Criss-cross inheritance Inheritance of characters not SHOWN by PARENTS SOLUTION :Inheritance of characters not shown by parents

Discussion

20789.	Question : At which stage, the pollen grains are liberated in the most angiosperms?
Answer» SOLUTION :The pollen GRAINS are liberated at 2-celled STAGE in most ANGIOSPERMS.

Discussion

20790.	Question : At which stage of Plasmodium asegmenting appears ?
Answer» ANSWER :TROPHOZOITE

Discussion

20791.	Question : During which stage of meiosis does crossing over take place ?
Answer» LEPTOTENE of PROPHASE I Zygotene STAGE of prophase I Diplotene stage of prophase I Pachytene stage of prophase I Answer :D

Discussion

20792.	Question : The amount of DNA per cell reduces to n during_____ stage.
Answer» ANSWER :Anaphase-II

Discussion

20793.	Question : At which stage of life is oogenesis initiated in human female? When does the oocyte complete oogenesis?
Answer» SOLUTION :During EMBRYONIC development, after the attainment of PUBERTY at every menstrual CYCLE.

Discussion

20794.	Question : At which stage of HIV infection does one usually show symptoms of AIDS?
Answer» When the infecting retrovirus inters host cells. When VIRAL DNA is produced by reverse transcriptase. When HIV replicates RAPIDLY in helper T-lymphocytes and damages large number of these. Within 15 days of SEXUAL contact with an infected person. Solution :When viral DNA is produced by reverse transcriptase.

Discussion

20795.	Question :At which particular stage of chromosomes do errors like deletion of genes occur in an individual?
Answer» SOLUTION :During MEIOSIS

Discussion

20796.	Question : At which of the following places is primary succession observed ?
Answer» COLD lava OPEN rock NEWLY formed pond All of the GIVEN SOLUTION :All of the given

Discussion

20797.	Question : At which latitude, heat gain through insolation approximately equals heat loss through terrestrial radiation?
Answer» `66^` NORTH and SOUTH `42 1/2overset@ ` North and South `42 1/2overset@ ` North and South `40^0` North and South Answer :C

Discussion

20798.	Question : At which ends do capping and tailing of hnRNA occur respectively?
Answer» SOLUTION :In hnRNA capping OCCURS at 5' end and tailing occurs at 3' end.

Discussion

20799.	Question : At which cellular stage , does the pollen grains are usually liberated from the anther
Answer» Solution :In general, the POLLEN grains are liberated at 2 - celled STAGE . On reaching the stigma at this stigma at this stage , the stigam at this stage , the generative CELL divides meiotically and form two male gametes (male cells )

Discussion

20800.	Question : At what the zygote of Plasmodium penetrates through the stomach wall of mosquito ?
Answer» ANSWER :Ookinete

Discussion

Explore topic-wise InterviewSolutions in .

Question : Attractants and rewards are required for

Question : Attractants and rewards are required for(A) anemophily(B) entomophily(B) hydrophily(D) cleistogamy

Question : Attempt any TWO of the following : (i) Describe the Wobble hypothesis .

Question : Attempt giving a clear definition of the term species.

Question : Attempt any TWO of the following : Give the diagrammatic representations of ETS.

Question : Attainment of sexual maturity during larval stage in some Urodeles is called______.

Question : A.T.S. of stem is stained frist with safranin and thenfast green. What would be the color of phloem ?

Question : Atrioventricular valves are opened due to

Question : Atrioventricular groove is also called a ………. .

Question : Atrial natriuretic factor (ANF) decreases

Question : Atrio-ventricular node is present in

Question : Atrial and branchial apertures of Herdmania are surrounded by

Question : Atretic follicle is

Question : ATP.and NADH, are called_____power of photosynthesis

Question :ATP synthesis is linked to

Question : ATP synthesis in chloroplast occurs :-

Question : ATP responsible for fixing CO_2and synthesis of sugar , is produced in the

Question : ATP is utilized in which one of these reaction of? C_(3)-Cycle (I) PGArightarrowBis PGA II) Bis PGArightarrowG-3-P G-3-P rightarrow DHAP IV) RUMPrightarrowRUBP

Question : ATP molecules required to synthesise one molecule of glucose by C_4 - pathway are

Question : ATP formation by oxidation of substrates is called_____.

Question : ATP Equivalents,produced during oxidation of catalysed by the enzyme

Question : ATP and NADPH_(2) possess the assimilatory power for the reduction of CO_(2) to ……….. During the dark reaction of photosynthesis.

Question : ATP-ase activity found in :-

Question : {:((a),"Totipotency ", -, "Gottlieb" ),(,,,"Haberlandt"),((b), "Differentiation " ,-,"Structural changes"),(,,, "of cell "),((c),"Redifferentiation" , -, "Explant "),((d), "Dedifferentiation", -, "Formation of callus" ):}

Question : Atomita 2 - rice is a product by ………….. .

Question : ________atom of chloro-fluorocarbon degrades ozone.

Question : Atmospheric pressure theory was rejected for the ascent of sap because

Question : Atmospheric pressure is measured by

Question : Atmospheric carbon monoxide concentration becomes harmful at

Question : Atmosphere of cities and metropolitan cities is polluted most by

Question : Observe the relationship between the first two terms and fill in the blanks. IR-8 : Rice Atlas 66 : __________

Question : Atlas 66 is the variety of

Question : a.Through which method do genes for disease resistance is transferred from a related crop to a cultivated variety? b.Give example for a vegetable crop which was transferred by this method. c.Give the name of new variety

Question : Athirappilly-Vazhachal dam construction project is under consideration of Government.As a biology student express your views.

Question : Atlas 66 is a improved variety of ………. .

Question : Athletes are tempted to use anabolic steroids. Why?

Question : Atavistic organs indicate

Question : Atavism refers to ..........

Question : At which stage, the pollen grains are liberated in the most angiosperms?

Question : At which stage of Plasmodium asegmenting appears ?

Question : During which stage of meiosis does crossing over take place ?

Question : The amount of DNA per cell reduces to n during_____ stage.

Question : At which stage of life is oogenesis initiated in human female? When does the oocyte complete oogenesis?

Question : At which stage of HIV infection does one usually show symptoms of AIDS?

Question :At which particular stage of chromosomes do errors like deletion of genes occur in an individual?

Question : At which of the following places is primary succession observed ?

Question : At which latitude, heat gain through insolation approximately equals heat loss through terrestrial radiation?

Question : At which ends do capping and tailing of hnRNA occur respectively?

Question : At which cellular stage , does the pollen grains are usually liberated from the anther

Question : At what the zygote of Plasmodium penetrates through the stomach wall of mosquito ?