24277 + Interview Questions in Biology in Class 12 Page 98 InterviewSolution

4851.	Question : The reactant reduced during photosynthesis _____
Answer» ANSWER :CARBON DIOXIDE

Discussion

4852.	Question : The ratio of various genotypes of a recombinant phenotype of F_(2) dihybrid cross
Answer» `1:2:1` `1:2` `1:2:1:2` `1:2:2:4` ANSWER :C

Discussion

4853.	Question : The ration of chlorophyll a to chlorphyll b in flowering plants is
Answer» `1.5:1` `0.5:1.5` `2.5-3.5:1` `5.5:1` ANSWER :C

Discussion

4854.	Question : The ratio of the number of kinds of double homozygous to double heterozygous to single homozygous genotypes of F_(2) generation of a Mendelian dihybrid cross is
Answer» `1:4:4` `4:4:1` `4:1:4` `4:2:3` ANSWER :C

Discussion

4855.	Question : The ratio of various genotypes of adouble dominant phenotype of F_(2) dihybrid cross
Answer» `1:2:1` `1:2` `1:2:1:2` `1:2:2:4` ANSWER :D

Discussion

4856.	Question : the ratio of monohybrid test cross is
Answer» `12:3:1` `1:1` `9:3:4` `9:6:1` ANSWER :B

Discussion

4857.	Question : The ratio of homozygous violet color flower pea plants and hetrozygous violet coour flower pea plants obtained in the F_(2) generation of a typical Mendelian monohybrid cross is
Answer» `3:1` `1:1` `1:2` `2:1` ANSWER :C

Discussion

4858.	Question : The ratio of homozygous dominant and homozygous recessive in dihybrid cross is
Answer» ` 1 : 16` `1:8` `16:1` NONE of these Solution :none of these

Discussion

4859.	Question : The ratio of methane, ammonia and hydrogen in Stanley Miller's experiment was
Answer» `3:1:2` `2:1:2` `1:2:1` `5:4:1` SOLUTION :`2:1:2`

Discussion

4860.	Question : The ratio of homozygous and hetrozygous organisms in the F_(2) of monohybrid corss
Answer» `1:1` `3:1` `1:3` `1:2` ANSWER :A

Discussion

4861.	Question : The ratio of F2 generation of a dihybrid cross having pure , monohybrids , dihybrids plants is
Answer» `1:2:1` `1:2:4` `1:4:8` `1:1:2` ANSWER :A

Discussion

4862.	Question : The ratio of 1:1:1:1 is obtained from a cross between the parents.
Answer» RRYY `XX` rryy RRYy `xx` rryy RrYY `xx` Rryy RrYy `xx` rryy Solution :RrYy `xx` rryy

Discussion

4863.	Question : The ratio between the number of kinds of homozygous genotypes and the number of kinds of heterozygous genotypes in the F_(2) of monohybrid cross
Answer» `1:1` `1:2` `1:2:1` `2:1` ANSWER :D

Discussion

4864.	Question : The ratio of a dihybrid test cross is
Answer» `9:3:3:1` `1:1` `1:1:1:1` `1:2:1:2` ANSWER :C

Discussion

4865.	Question : The ratio between the number of 2 - carbon and 3 - carbon intermediates having -NH_2 group formed in photosynthetic oxidation cycle is
Answer» `1:1` `2:1` `3:2` `3:4` ANSWER :B

Discussion

4866.	Question : The ratio between carrier, disease free & diseased individual on marriage between two carriers of sickle cell anaemia will be -
Answer» `0 : 2 : 1` `0 : 1 : 1` `1 : 2 : 1` `2 : 1 : 1` ANSWER :D

Discussion

4867.	Question : The ratio ………is seen in inhibitory gene interaction.
Answer» `9:7` `9 : 3 : 4` `13:3` `9 : 6 :1`

Discussion

4868.	Question : The rate of transpiration will be very less in situation where:
Answer» Ground WATER is sufficiently available Wind is BLOWING with a very HIGH velocity Environment is very HOT and dry Relative humidity is very high Answer :D

Discussion

4869.	Question : The rate of transpiration can be measured with the help of:
Answer» AUXANOMETER Refractometer Spectrophotometer Potometer Answer :D

Discussion

4870.	Question : The rate of synthesis of m-RNA is regulated by what ?
Answer» PROMOTER GENE REGULATORY gene Operator gene Structural gene Solution :Promoter gene

Discussion

4871.	Question : The rate of release of carbon dioxide into the atmosphere is significantly increased by A.rapid deforestation B. massive burning of fossil fuels for energy and transport C. burning of wood D. combustion of organic matter E. volcanic activity
Answer» B,C,D,E,F A,B,C,D,E,F A,B,C,D A,C,D,E,F Solution :A,B,C,D,E,F

Discussion

4872.	Question : The rate of photosysnthesis is determined by the factor available at
Answer» very LOW OPTIMUM SUB optimum maximum Answer :C

Discussion

4873.	Question : The rate of photosynthesis is maximum in
Answer» GREEN light Blue light Red light Far-red light Answer :C

Discussion

4874.	Question : The rate of photosynthesis is higher in:
Answer» Very HIGH light Continuous light Red light Green light Answer :C

Discussion

4875.	Question : The rate of increase of biomass is called ……….. .
Answer» GROSS PRIMARY productivity net primary productivity secondary productivity pyramid of biomass Answer :B

Discussion

4876.	Question : The rate of formation of new organic matter by rabbit in a grassland, is called
Answer» Net PRODUCTIVITY SECONDARY productivity Net primary productivity Gross primary productivity SOLUTION :Secondary productivity

Discussion

4877.	Question : the rate of decomposition increases if detritus is rich in
Answer» Lignin and CHITIN NITROGEN compounds like PROTEIN and NUCLEIC acid tennis and cellulose chitin and phenotics Answer :B

Discussion

4878.	Question : The rate of decomposition of detritus is affected by the abiotic factors like availability of oxygen, pH of the soil substratum, temperature etc. Discuss.
Answer» Solution :Detritus or animals and plant parts are decomposed by microbes like bacteria and fungi. The rate of these DECOMPOSES is affected by abiotic factors like temperature, moisture, pH of soil and light. Soil pH affects composition of acidic and alkaline microbes. Anaerobiosis and acrobiosis occure in absence of oxygen and PRESSURE of oxygen respectively. The substance is COMPLETELY decomposed in presence of oxygen while anaerobiosis and aerobiosis processes occure in absence of oxygen and presence of oxygen. Similarly microbes do not possess growth in best WAY at high temperature but EITHER at high or low temperature tallerent microbes possess growth.

Discussion

4879.	Question : The rate of convertion of light energy into chemical energy of organic molecules in an ecosystem is
Answer» NET Primary PRODUCTIVITY Gross Primary Productivity Net Secondary Productivity Gross Secondary Productivity ANSWER :B

Discussion

4880.	Question : The rate of breakdown of glucose into pyruvic acid is under certain controlling steps. The major controlling step is :-
Answer» FRUCTOSE 6–P `to` Fructose 1, 6 bisphosphate PGAL `to` 1, 3 bisphosphoglyceric acid Glucose 6-P `to` Fructose 6-P 3PGA `to` 2PGA Answer :A

Discussion

4881.	Question : The rate of appearance of new forms is linked to the life span of an organism. Explain with the help of a suitable example.
Answer» SOLUTION : The rate of appearance of new forms is linked to the life span of an organism. Example: Microbes that divide fast have the ability to multiply and BECOME millions of individuals within HOURS. Thus any variation leading to natural selection and appearance of a new species is observable in them within days. For the same thing to happen in a fish or fowl it WOULD take millions of years as life span of these ANIMALS is in years.

Discussion

4882.	Question : The rate of appearance of new forms is linked to the life cycle or the life span. Explain with a suitable example.
Answer» Solution :Microbes that DIVIDE fast have the ability to multiply and become millions of individuals within HOURS, a colony of bacteria (say A) growing on a given medium has built in VARIATION in terms of ability to utilise a feed component, a change in the medium composition would bring out only that part of the population (say B), that can survive under the new conditions, this variant population outgrows the others and appears as new species, this would happen within DAYS, for the same thing to happen in a fish or fowl would take million of years as life spans of these animals are in years// or any other relevant example with explanation

Discussion

4883.	Question : The rate of biomass production in an ecosystem is called productivity. They are of two types- Gross primary productivity and net primary productiviy. How are these two productivities related?
Answer» SOLUTION :Net primary PRODUCTIVITY is the GROSS primary produtivity - respiration losses. That is NPP = GPP - R

Discussion

4884.	Question : The rate at which new tissues are formed in producers in the ecosystem's
Answer» NET PRIMARY PRODUCTIVITY gross primary productivity net SECONDARY productivity gross secondary productivity ANSWER :A

Discussion

4885.	Question : The rate at which light energy of organic molecules is the ecosystem's
Answer» net primary PRODUCTIVITY GROSS primary productivity net secondary productivity gross secondary productivity ANSWER :B

Discussion

4886.	Question : The rarest leucocyte of human blood is
Answer» Basophil Monocytes Neutrophil Eosinophil Answer :A

Discussion

4887.	Question : The range of biomagnification of DDT in an aquatic food chain, if starting from 0.003 ppb level in water may go at fish-eating bird level upto
Answer» 0.5 ppm 5.0 ppm 15.0 ppm 25.0 ppm Answer :D

Discussion

4888.	Question : The r value for human population in India is ..........
Answer» 0.15 0.0502 0.0205 0.012 ANSWER :C

Discussion

4889.	Question : The r value for flour beetle is ..
Answer» 0.15 0.12 0.21 0.012 ANSWER :B

Discussion

4890.	Question : The quietest sound that the ear of a man can delete is known as
Answer» Acoustic zoning THRESHOLD of hearing Threshold of PAIN GREEN muffler Answer :B

Discussion

4891.	Question : The quickest method of plant breeding is
Answer» INTRODUCTION Selection Hybridization. MUTATION BREEDING Solution :Mutation breeding

Discussion

4892.	Question : The quantity 1500 mL in the respiratory volumes of a normal human adult refers to
Answer» MAXIMUM ari that can be BREATHED in and breathed out RESIDUAL volume expriatory reserve volume Total lung capacity minus residual volume Solution :Residual air is the volume of air that remains in the lungs after the most forcelfu expiration .It equal s to 1500 mL .Resdual air mostly OCCURS in alveoli Maximum air that can be breathed in and breathed that OCAN be expird over and above the tidal air by most forceful expirationn is the expiratiory reserve volume (1200 mL).

Discussion

4893.	Question :The quality of which vitamin is increased by LAB?(A) Vitamin A(B) Vitamin B_12(C) Vitamin B(D) Vitamin C
Answer» VITAMIN A Vitamin `B_12` Vitamin B Vitamin C Solution :Vitamin `B_12`

Discussion

4894.	Question : The pyramid of ……….. In sea is always inverted.
Answer» biomass energy numbers species Answer :A

Discussion

4895.	Question : The pyramid of number in a grassland ecosystem
Answer» Linear Inverted Upright Negative ANSWER :A

Discussion

4896.	Question : The pyramid of biomass in sea is generally.
Answer» Linear Inverted Upright CYCLIC ANSWER :B

Discussion

4897.	Question : Which one of the following shows a pyramid of biomass in a pond ecosystem ?
Answer» Inverted Upright SPINDLE SHAPED Either spindle shaped or upright Answer :A

Discussion

4898.	Question : The pyramid of energy is always upright for eny ecosystem. This situation indicates the fact that :
Answer» PRODUCERS have the lowest energy CONVERSION dfficiency carnivoreshave a BETTER energy conversion EFFICIENCY energy conversion efficiency efficiency is the same in all TROPHIC levels herbivores have a better energy conversion efficiency than carnivores Answer :D

Discussion

4899.	Question : The pyramid of biomass in sea is also inverted, why?
Answer» Solution :The pyramid of BIOMASS in sea is ALSO generally inverted because the biomass of FISHES FAR exceeds that of phytoplankton.

Discussion

4900.	Question : The purpose of biological treatment of waste water is to ________ .
Answer» REDUCE BOD INCREASE BOD Reduce SEDIMENTATION Increase sedimentation Answer :a

Discussion

Explore topic-wise InterviewSolutions in .

Question : The reactant reduced during photosynthesis _____

Question : The ratio of various genotypes of a recombinant phenotype of F_(2) dihybrid cross

Question : The ration of chlorophyll a to chlorphyll b in flowering plants is

Question : The ratio of the number of kinds of double homozygous to double heterozygous to single homozygous genotypes of F_(2) generation of a Mendelian dihybrid cross is

Question : The ratio of various genotypes of adouble dominant phenotype of F_(2) dihybrid cross

Question : the ratio of monohybrid test cross is

Question : The ratio of homozygous violet color flower pea plants and hetrozygous violet coour flower pea plants obtained in the F_(2) generation of a typical Mendelian monohybrid cross is

Question : The ratio of homozygous dominant and homozygous recessive in dihybrid cross is

Question : The ratio of methane, ammonia and hydrogen in Stanley Miller's experiment was

Question : The ratio of homozygous and hetrozygous organisms in the F_(2) of monohybrid corss

Question : The ratio of F2 generation of a dihybrid cross having pure , monohybrids , dihybrids plants is

Question : The ratio of 1:1:1:1 is obtained from a cross between the parents.

Question : The ratio between the number of kinds of homozygous genotypes and the number of kinds of heterozygous genotypes in the F_(2) of monohybrid cross

Question : The ratio of a dihybrid test cross is

Question : The ratio between the number of 2 - carbon and 3 - carbon intermediates having -NH_2 group formed in photosynthetic oxidation cycle is

Question : The ratio between carrier, disease free & diseased individual on marriage between two carriers of sickle cell anaemia will be -

Question : The ratio ………is seen in inhibitory gene interaction.

Question : The rate of transpiration will be very less in situation where:

Question : The rate of transpiration can be measured with the help of:

Question : The rate of synthesis of m-RNA is regulated by what ?

Question : The rate of release of carbon dioxide into the atmosphere is significantly increased by A.rapid deforestation B. massive burning of fossil fuels for energy and transport C. burning of wood D. combustion of organic matter E. volcanic activity

Question : The rate of photosysnthesis is determined by the factor available at

Question : The rate of photosynthesis is maximum in

Question : The rate of photosynthesis is higher in:

Question : The rate of increase of biomass is called ……….. .

Question : The rate of formation of new organic matter by rabbit in a grassland, is called

Question : the rate of decomposition increases if detritus is rich in

Question : The rate of decomposition of detritus is affected by the abiotic factors like availability of oxygen, pH of the soil substratum, temperature etc. Discuss.

Question : The rate of convertion of light energy into chemical energy of organic molecules in an ecosystem is

Question : The rate of breakdown of glucose into pyruvic acid is under certain controlling steps. The major controlling step is :-

Question : The rate of appearance of new forms is linked to the life span of an organism. Explain with the help of a suitable example.

Question : The rate of appearance of new forms is linked to the life cycle or the life span. Explain with a suitable example.

Question : The rate of biomass production in an ecosystem is called productivity. They are of two types- Gross primary productivity and net primary productiviy. How are these two productivities related?

Question : The rate at which new tissues are formed in producers in the ecosystem's

Question : The rate at which light energy of organic molecules is the ecosystem's

Question : The rarest leucocyte of human blood is

Question : The range of biomagnification of DDT in an aquatic food chain, if starting from 0.003 ppb level in water may go at fish-eating bird level upto

Question : The r value for human population in India is ..........

Question : The r value for flour beetle is ..

Question : The quietest sound that the ear of a man can delete is known as

Question : The quickest method of plant breeding is

Question : The quantity 1500 mL in the respiratory volumes of a normal human adult refers to

Question :The quality of which vitamin is increased by LAB?(A) Vitamin A(B) Vitamin B_12(C) Vitamin B(D) Vitamin C

Question : The pyramid of ……….. In sea is always inverted.

Question : The pyramid of number in a grassland ecosystem

Question : The pyramid of biomass in sea is generally.

Question : Which one of the following shows a pyramid of biomass in a pond ecosystem ?

Question : The pyramid of energy is always upright for eny ecosystem. This situation indicates the fact that :

Question : The pyramid of biomass in sea is also inverted, why?

Question : The purpose of biological treatment of waste water is to ________ .