24277 + Interview Questions in Biology in Class 12 Page 317 InterviewSolution

15801.	Question : Explain how "Rosie" is different from a normal cow.
Answer» Solution :Rosie, the FIRST TRANSGENIC cow produced human protein enriched milk, which contained the human alpha lactalbumin. The protein rich milk (2.4 gm/litre) was a nutritionally balanced FOOD for new born BABIES than the normal milk produced by the cows.

Discussion

15802.	Question : How Rhizobium acts as a efficient bio - fertilizer?
Answer» Solution :Bio-fertilizers CONTAINING rhizobium bacteria are CALLED rhizobium bio-fertilizer CULTURE. Symbiotic bacteria that reside inside the root noules convert the atmospheric nitrogen into a bio AVAILABLE form to the plants. This nitrogen fixing bacterium when applie to the soil undergoes multiplication in billions and fixes the atmospheric nitrogen in the soil. Rhizobium is best SUITED for that paddy fields which increase the yield by 15-40%.

Discussion

15803.	Question : How retroviruses are being used in genetic engineering.
Answer» SOLUTION : For REVERSE TRANSCRIPTION, i.e., synthesis of DNA from mRNA

Discussion

15804.	Question : How recombinant protein can be obtained ?
Answer» SOLUTION :When you insert a piece of alien DNA into a cloning vector and transfer it into a bacterial, plant or animal cell, the alien DNA gets multiplied. In almost all recombinant technologies, the ultimate aim is to produce a desirable protein. Hence, there is a need for the recombinant DNA to be expressed. The foreign gene gets expressed under appropriate conditions. If any protein encoding gene is expressed in heterologus HOST it is called recombinant protein. The cells harbouring cloned genes of interest may be grown on a small scale in the laboratory. The cultures may be used for extracting the desired protein and then purifying it by USING different separation techniques. The cells can also be multiplied in a continuous culture system wherein the used medium is drained out from one side while fresh medium is added from the other to maintain the cells in their physiologically most active log/exponential phase. This type of culturing ti METHOD produces a larger biomass leading to HIGHER yields of desired protein.

Discussion

15805.	Question :How recombinant hepatitis B vaccine is produced in laboratory?
Answer» Solution :Recombinant hepafitis B vaccinc as a subunit vaccine is produced by cloning hepatitis Bsurface ANTIGEN (HBSAG) gene in the yeast, SACCHAROMYCES cerevisiae.

Discussion

15806.	Question : How reproduction in plants accomplished?
Answer» Solution :It OCCURS without fusion of GAMETS (ASEXUAL) or by fusion of gamests (SEXUAL).

Discussion

15807.	Question : How radioactive wastes are generated?
Answer» Solution :Radioactive WASTE management involves the treatment, storage, and DISPOSAL of liquid, airborne, and solid effluents from the nuclear industry. Methods of disposal of radioactive wastes are: 1. Limit generation - Limiting the generation of waste is the first and most important consideration in managing radioactive wastes. 2. Dilute and disperse - For wastes having low radioactivity, dilution and dispersion are adopted. 3. Delay and decay - Delay and decay is frequently an important STRATEGY because much of the radioactivity in nuclear reactors and accelerators is very short lived. 4. Concentrate and confine process - Concentrating and containing is the objective of treatment activities for longer-lived radioactivity. The waste is contained in corrosion resistant containers and transported to disposal sites. Leaching of heavy metals and radionuclides from these sites is a problem of growing concern.

Discussion

15808.	Question : Why secondary immune response is more effective than primary immune response?
Answer» SOLUTION :

Discussion

15809.	Question : How physical dryness differ from physiological dryness?
Answer» Solution :Physical dryness: In these habitats, soil has a LITTLE AMOUNT of water due to the inability of the soil to hold water because of LOW RAINFALL. Physiological dryness: In these habitats, water is sutñciently present but plants are unable to absorb it because of the absence of capillary spaces. Example: Plants in SALTY and acidic soil.

Discussion

15810.	Question : How PCR helps forensic personnel?
Answer» SOLUTION :PCR technique can also be used in the FIELD of forensic medicine. A single MOLECULE of DNA from blood stains, hair, semen of an individual is adequate for amplification by PCR. Theamplified DNA is used to DEVELOP DNA fingerprint which is used as an important TOOL in forensic science.Thus, PCR is very useful for identification of criminals. PCR is also used in amplification of specific DNA segment to be used in gene therapy.

Discussion

15811.	Question : How ozone hole is developed?
Answer» SOLUTION :Ozone depletion: Thinning of the stratospheric ozone layer is known as ozone depletion. Such depletion causes the .ozone HOLE., RESULTING in poor screening of the HARMFUL UV rays and increase in incidences of skin cancer. Some of the common agents that deplete ozone are CFCs.

Discussion

15812.	Question :How Ozone depletion can be controlled?
Answer» Solution :Ozone LAYER DEPLETION can be controlled by (1) Phase down or ban the use of CFCS (CFC free refrigerants). (2) MINIMIZING the use of chemicals such as HALONS and halocarbons. (3) Creating awareness about ozone depleting agents.

Discussion

15813.	Question :How old is our solar system?
Answer» SOLUTION :4.5 to 5 BILLION YEARS

Discussion

15814.	Question : How nuclear endosperm is different from cellular endosperm
Answer» SOLUTION :

Discussion

15815.	Question : How Net Primary Productivity can be derived?
Answer» SOLUTION :Net Primary Productivity (NPP) is derived by the DIFFERENCE between Gross primary productivity (GPP) and RESPIRATION.

Discussion

15816.	Question : How much volume of CO_(2) is removed by our lungs in 1 minute ?
Answer» 250ml 200lit 18 ml 200 ml Answer :D

Discussion

15817.	Question :How natality and mortality can be calculated?
Answer» Solution :BIRTH rate (B) `= ("number of births PER UNIT time ")/("AVERAGE population")` Death rate (d) `=("number of deaths per unit time ")/("average population")`

Discussion

15818.	Question : The volume of urine which is passed by a human adult during 24 hours is _____.
Answer» ANSWER :1.5 LITRES

Discussion

15819.	Question : How much usable energy is available during oxidative combustion of 1 gm mole of glucose in the body ?
Answer» 686000 cal 304000 cal 277400 cal 686 cal. Solution :N//A

Discussion

15820.	Question : How much species of butterfly on western Ghat and how much are on the average of extinction ?
Answer» 170, 70 270, 70 370, 70 470, 70 Solution :370, 70

Discussion

15821.	Question : How much protein is produced per day by a 250 kg. cow ?
Answer» 100 GM 200 gm 300 gm 400 gm Solution :200 gm

Discussion

15822.	Question : How much pollution of air is due to human activities ?
Answer» SOLUTION :Just 0.05% of the TOTAL ANNUAL EMISSION into AIR.

Discussion

15823.	Question : How much ppm DDT is found in fish-eating birds?(A) 15 ppm(B) 20 ppm(C) 35 ppm(D) 25 ppm
Answer» 15 PPM 20 ppm 35 ppm 25 ppm ANSWER :D

Discussion

15824.	Question : How much percent of SO_(2) is noted by Gujarat Pollution Control Board, Gandhinagar in the year 2010-11 in the sabarmati area of Ahmedabad ?
Answer» 22.3 23.3 24.3 21.3 ANSWER :B

Discussion

15825.	Question : How much particulate Matter pollution can be removed Electrostatic precipitators ?(A) 60%(B) 90%(C) 80%(D) 70%
Answer» `60%` `90%` `80%` `70%` . ANSWER :C

Discussion

15826.	Question : How much part of cell cycle formed by interphase :-
Answer» 0.5 0.7 0.1 0.95 Answer :D

Discussion

15827.	Question : How much of the total blood volume is present in heart
Answer» 0.025 0.17 0.09 0.15 Answer :A

Discussion

15828.	Question : How much of the net primary productivity of a terrestrial ecosystem is eaten and digested by herbivores ?
Answer» `1%` `10%` `40%` `90%` Solution :At each step carnivore or grazing animals are hunted herbivores are eaten by carnivores. If they die naturally they are transformed by DECOMPOSERS either present in the BODY of herbivores or at any equatorial level. The PRODUCTIVITY only `10%` herbivores, the productivity of other level animals are used more. White remaining `90%` is taken as food and used. Respiration is used for maintenance of body HEAT and other processes.

Discussion

15829.	Question : How much of the energy released during aerobic respiration is approximately conserved in the form of ATP
Answer» 0.2 0.4 0.6 1 Answer :B

Discussion

15830.	Question : How much linkage strength is present between two genes A & B, which are 6 cM far from each other in a chromosome ?
Answer» `6%` `le 50%` `94%` DATA insufficient Answer :C

Discussion

15831.	Question : How much of carbon is fixed in the biosphere through photosynthesis annually?
Answer» SOLUTION :`4XX10^(13)`KG.

Discussion

15832.	Question : How much methylophills - microorganisms are needed to produce 200 gm. protein in a single day?
Answer» 250GM 250 KG 200gm 160gm Solution :250gm

Discussion

15833.	Question : How much mountain area is required according to NFPI?
Answer» `47%` `57%` `56%` `67%` ANSWER :D

Discussion

15834.	Question : How much of carbon is dissolved in the Ocean?
Answer» SOLUTION :71% of GLOBAL CARBON.

Discussion

15835.	Question : How much forest area of total land was decreased in the total land in India at the end of twentieth century ?(A) 17.4%(B) 29.4%(C) 19.4%(D) 9.4%
Answer» `17.4%` `29.4%` `19.4%` `9.4%` ANSWER :C

Discussion

15836.	Question : How much energy is gained directly during glycolysis from one molecular of glucose ?
Answer» 34 kJ 72 kJ 68 kJ 60 kJ Answer :C

Discussion

15837.	Question : How much energy is released when one molecule of ATP is hydrolysed to ADP and Pi?
Answer» Solution :When an ATP MOLECULE undergoes HYDROLYSIS, it RELEASES 7.3 kcal energy.

Discussion

15838.	Question : How much fishery of the world is caught by oceans?
Answer» 0.7 0.75 0.8 0.9 Solution :0.9

Discussion

15839.	Question : How much energy is conserved as ATP per mole of O_2 reduced into H_2O ?
Answer» 36 38 6 36 in EUKARYOTES and 38 in prokaryotes. Solution :For `1/2O_2`,3ATP are FORMED.

Discussion

15840.	Question : How much blood is lost during menstrual cycle?
Answer» 50 ML to 150 ml 50 ml to 250 ml 10 ml to 100 ml 10 ml to 50 ml Answer :A

Discussion

15841.	Question : How much blood is present in the human body and what percentage of body weight does it form?
Answer» Solution :In average ADULT human body there is about 5 litres of BLOOD that CONSTITUTES about 8% of body weight.

Discussion

15842.	Question : How much critically endangered animal species in India ?
Answer» 31 18 109 54 Solution :54

Discussion

15843.	Question : How much carbon is fixed approximately in biosphere annually through photosynthesis ?
Answer» `4XX10^(13)kg` `4xx10^(10)kg` `4xx10^(8)kg` `4xx10^(20)kg` Solution :`4xx10^(13)kg`

Discussion

15844.	Question : How much biogeographic area of India ?
Answer» 8 10 16 18 Solution :10

Discussion

15845.	Question : How much amount of oxygen can bind to one gram of haemoglobin?
Answer» 20 ml 1.34 ml 40 ml 13.4 ml Answer :B

Discussion

15846.	Question : How much assimilatory power is required to form one glucose in a C_3 plant
Answer» 18 ATP - 12NADPH ` +H^(+)` 30 ATP - 12NADPH ` +H^(+)` 24 ATP - 18NADPH ` +H^(+)` 30 ATP - 18NADPH ` +H^(+)` ANSWER :A

Discussion

15847.	Question : How much amount of incident solar radiation (ISR) is used in the photosynthesis process by plants :-
Answer» 1-5% 5-10% 20-40% 50-70% ANSWER :A

Discussion

15848.	Question : How much amount of carbondioxide istransported by plasma?
Answer» (1) 75 % to 78% (2)5% to 7% (3) 20% to 25% (4)93% ANSWER :A

Discussion

15849.	Question : How much amount of blood is put out of the heart during one minute ?
Answer» Equal to CARDIAC output Equal to stroke volume Equal to HALF of BLOOD volume Equal to QUARTER of blood volume Answer :A

Discussion

15850.	Question : How monarch butterfly survives from its predator?
Answer» Solution :The Monarch butterfly is highly distasteful to its predator (bird) because of a special chemical present in its BODY. Interestingly, the butterfly ACQUIRES this chemical during its CATERPILLAR STAGE by feeding on a poisonous WEED.

Discussion

Explore topic-wise InterviewSolutions in .

Question : Explain how "Rosie" is different from a normal cow.

Question : How Rhizobium acts as a efficient bio - fertilizer?

Question : How retroviruses are being used in genetic engineering.

Question : How recombinant protein can be obtained ?

Question :How recombinant hepatitis B vaccine is produced in laboratory?

Question : How reproduction in plants accomplished?

Question : How radioactive wastes are generated?

Question : Why secondary immune response is more effective than primary immune response?

Question : How physical dryness differ from physiological dryness?

Question : How PCR helps forensic personnel?

Question : How ozone hole is developed?

Question :How Ozone depletion can be controlled?

Question :How old is our solar system?

Question : How nuclear endosperm is different from cellular endosperm

Question : How Net Primary Productivity can be derived?

Question : How much volume of CO_(2) is removed by our lungs in 1 minute ?

Question :How natality and mortality can be calculated?

Question : The volume of urine which is passed by a human adult during 24 hours is _____.

Question : How much usable energy is available during oxidative combustion of 1 gm mole of glucose in the body ?

Question : How much species of butterfly on western Ghat and how much are on the average of extinction ?

Question : How much protein is produced per day by a 250 kg. cow ?

Question : How much pollution of air is due to human activities ?

Question : How much ppm DDT is found in fish-eating birds?(A) 15 ppm(B) 20 ppm(C) 35 ppm(D) 25 ppm

Question : How much percent of SO_(2) is noted by Gujarat Pollution Control Board, Gandhinagar in the year 2010-11 in the sabarmati area of Ahmedabad ?

Question : How much particulate Matter pollution can be removed Electrostatic precipitators ?(A) 60%(B) 90%(C) 80%(D) 70%

Question : How much part of cell cycle formed by interphase :-

Question : How much of the total blood volume is present in heart

Question : How much of the net primary productivity of a terrestrial ecosystem is eaten and digested by herbivores ?

Question : How much of the energy released during aerobic respiration is approximately conserved in the form of ATP

Question : How much linkage strength is present between two genes A & B, which are 6 cM far from each other in a chromosome ?

Question : How much of carbon is fixed in the biosphere through photosynthesis annually?

Question : How much methylophills - microorganisms are needed to produce 200 gm. protein in a single day?

Question : How much mountain area is required according to NFPI?

Question : How much of carbon is dissolved in the Ocean?

Question : How much forest area of total land was decreased in the total land in India at the end of twentieth century ?(A) 17.4%(B) 29.4%(C) 19.4%(D) 9.4%

Question : How much energy is gained directly during glycolysis from one molecular of glucose ?

Question : How much energy is released when one molecule of ATP is hydrolysed to ADP and Pi?

Question : How much fishery of the world is caught by oceans?

Question : How much energy is conserved as ATP per mole of O_2 reduced into H_2O ?

Question : How much blood is lost during menstrual cycle?

Question : How much blood is present in the human body and what percentage of body weight does it form?

Question : How much critically endangered animal species in India ?

Question : How much carbon is fixed approximately in biosphere annually through photosynthesis ?

Question : How much biogeographic area of India ?

Question : How much amount of oxygen can bind to one gram of haemoglobin?

Question : How much assimilatory power is required to form one glucose in a C_3 plant

Question : How much amount of incident solar radiation (ISR) is used in the photosynthesis process by plants :-

Question : How much amount of carbondioxide istransported by plasma?

Question : How much amount of blood is put out of the heart during one minute ?

Question : How monarch butterfly survives from its predator?