24277 + Interview Questions in Biology in Class 12 Page 22 InterviewSolution

1051.	Question : What would be the per cent growthor birth rate per individual per hour for the same population mentioned in the previous question ?
Answer» 100 200 50 150 Answer :B

Discussion

1052.	Question :What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its root tip cells ?
Answer» 42 63 84 21 Answer :B

Discussion

1053.	Question : What would be the molar concentration of human DNA in a human cell ? Consult your teacher.
Answer» SOLUTION :The MOLAR concentration of DNA in one CELL of HUMAN being is 3M.

Discussion

1054.	Question : What would be the molar concentration of human DNA in a human cell. Consult your teacher
Answer» Solution :Human cells vary in size and VOLUME. Amount of DNA is fixed in all human cells that makes it IMPOSSIBLE to state a concentration for DNA. SINCE the volume of human cell is not constant only a range can be GIVEN which has little or no practical utility.

Discussion

1055.	Question : What would be the molar concentration of human DNA can be studied by Electro-phoresis.
Answer» Solution :HUMAN cells vary in SIZE and volume. DNA is fixed in its size. That MAKES it kind of hard (like impossible) to state a concentration for DNA. Only a RANGE can be given, and that information has little tono practical value and EVEN less meaning .

Discussion

1056.	Question : What would be the number of chromosomes of aleurone cell of a plant with 42 chromosomes in its root tip cells?(A) 63(B) 84(C) 21(D) 42
Answer» 63 84 21 42 Answer :A

Discussion

1057.	Question : What would be theinpact on the environment around a thermal power plant if its electrostatic precipitatorfunctioning ? Give a reason.
Answer» Solution :Electrostatic precipitatorcan remove 99%particulatematterfunctioningit CAUSES breathing and respiratiory PROBLEMS , irritation INFLAMMATION and damge to the lungs and preamaturedeaths :

Discussion

1058.	Question : What would be the direction of the movement of water if two cells have the same OP but differ in TP?
Answer» no NET flow from LOWER TP to HIGHER TP from higher TP to lower TP data insufficient Answer :C

Discussion

1059.	Question : What would be the growth rate pattern, when the resources are unlimited ?
Answer» Solution :When the resources are UNLIMITED then the GROWTH RATE PATTER will be Exponential.

Discussion

1060.	Question :What would be the correct base sequence in mRNA for the given DNA strand? 5'-AATGCCTTAAGC-3'
Answer» 5'-GCUUAAGGCAUU-3' 5'-UUACGGAATTCG-3' 3'-UUACGGAAUUCG-5' 3'-AAUGCCUUAUCG-5' ANSWER :C

Discussion

1061.	Question : What would be the cardiac output of a person having 72 heart beats per minute and a stroke volume of 50 mL?
Answer» 360 mL 3600 mL 7200 mL 5000 mL Answer :B

Discussion

1062.	Question : Whatwould be the base sequence of RNA transcript obtainedfrom the given DNA segment ? 5' - G C A T T C G G CT A G T A A C-3 Coding strand of DNA 3' - C G T A A G C C G A T C A T CA T T G-5' Non - coding strand of DNA
Answer» 5'-G C A U U C G G C U A G U A A C-3' 5'- C G U A A G C C G A U C A U U G -3' 5'- G C A T T C G G C T A G T A A C -3' 3'- C G T A A G C C G A T C A T T G-5' Solution :(a) : The two strands have OPPOSITE polarity and the DNA-dependent RNA polymerase ALSO catalyse the POLYMERISATION in only one direction, that is , `5' rarr 3'` the STRAND that has the sequence same as RNA (except thymineat the place of uracil ) is displaced during transcription. This strand (which does not code for anything ) is referred to as coding strand.

Discussion

1063.	Question : What would be segregation pattern of ascospores in Neurospora asci in case of 'crossing over' of the type given below?
Answer» AB,ab, ab, AB,AB,AB,AB Ab,Ab,Ab,Ab,aB,aB,aB,aB Ab,Ab,aB,aB,aB,aB,aB,Ab,Ab aB,aB,ab,ab,AB,AB,Ab,Ab Answer :B

Discussion

1064.	Question : What will you do to convert a bisexual flower into afemale so that it is cross pollinated artificially.
Answer» Solution :Bisexual FLOWER possesses both stamens and the PISTIL. The stamens arethe MALE reporeductive organs which must be removed in order to get the flower converted into FEMALE. Stamens are femoved on after the other wit hte help of a pair of forceps. This done in the bud condition of a fllower and then the pistils is protected till maturity for POLLINATION with desired pollen grains.

Discussion

1065.	Question : What will these DNA codons be translated into TAC, AAA, ATC? (b) What are the DNA codons that would have transcribed these RNA codons AUGUUUUAG?
Answer» Solution :(a) AUG signals the SYNTHESIS of polypeptide (start signal) and CODES for the amino acid METHIONINE. UUU codes for phenylalanine. UAG do not SPECIFY any amino acid and hence is called nonsense codon. It signals the termination of polypeptide chain (stop signal) (b) TACAAAATC.

Discussion

1066.	Question : What will happen when cut end of the shoot is dipped in eosin dye solution ?
Answer» Ascent of SAP does not OCCURS Ascent of sap does not OCCUR but leaves REMAIN fresh Leaves wilt Ascent of sap occurs and tracheary elements GET stained Answer :D

Discussion

1067.	Question : What will happen to the rate of photosysnthesis if rate of translocation of food is slow tha photosynthesis rate ?
Answer» BECOMES double Decreases INCREASES Remains same Answer :B

Discussion

1068.	Question : What will happen to an ecosystem if : (a) All producers are removed, (b) All organisms of herbivore level are eliminated, and (c) All top carnivore population is removed
Answer» Solution :(a) If all producers are removed then primary productivity will be decreased. Therefore biomass will not be obtained to next successive/sequential higher EQUATORIAL trophic level or heterotrophic organisms. (B) If all herbivores organisms are removed primary productivity and biomass of producers will increase and carnivores animals will not be survived due lo animals are not obtained as FOOD. (C) By removing higher carnivores there would be disturbance in ecosystem because herbivores will be increased in number which destroy trees and PRODUCE desert region.

Discussion

1069.	Question : What will happen to an ecosystem if: (a) All producers are removed (b) All organisms of herbivore level are eliminated (c ) All top carnivore population is removed.
Answer» SOLUTION :(a) REDUCTION in PRIMARY Productivity and biomass of producers. No biomass available for transfer to NEXT higher tropic levels. (b) Increase in Primary productivity and biomass of producers. Carnivore population will dwindle. (C ) Overgrazing leading to desertification.

Discussion

1070.	Question : What will happen to a well growing herbaceous plant in the forest if it is transplanted outside the forest in a park?
Answer» It will grow normally It will grow well because it is planted in the same LOCALITY It MAY not SURVIVE because of change in its micro climate It GROWS very well because the plant gets more sunlight Solution :A well growing herbaceous plant in the forest if it is transplanted outside the forest in a park. It may not survive because of change in its micro climate.

Discussion

1071.	Question : What will happen to a well growing herbaceous plant in the forest if it is transplanted outside the forest in a park ?
Answer» It will grow normally. It may not survive because of CHANGE in its micro climate. It will grow well because it is planted in the same locality. It GROWS very well because the plant GETS more SUNLIGHT Answer :B

Discussion

1072.	Question : What will happen if Zona Pellucida gets damaged accidently?
Answer» Solution :In unfertilized OOCYTE, there will be no PROTECTIVE membrane and hence the oocyte will perish. The fertilized egg may get implanted in FALLOPIAN tube leading to tube PREGNANCY.

Discussion

1073.	Question : What will happen if the secretion of parietal cells of gastric glands is blocked with an inhibitor?
Answer» In the absence of HCI secretion, INACTIVE pepsinogen is not converted into the active ENZYME pepsin Enterokinase will not be RELEASED from the duodenal mucosa and so trypsinogen is not converted to trypsin. Gastric JUICE will be deficient in chymosin. Gastric juice will be deficient in pepsinogen. Answer :A

Discussion

1074.	Question : What will happen if predator population becomes more efficient?
Answer» Solution :If predator POPULATION is more efficient, then the PREY population will decline, this in TURN will MAKE predator hungry and their population will also decline.

Discussion

1075.	Question : What will happen if pleural fluid isabsent from pleural space?
Answer» Nothing will happen PLEURAL membranes will stick to each other Lungs will slip over PLEURA during breathing Pleural membranes PRESS against each other to form medfastinal SEPTUM Answer :C

Discussion

1076.	Question :What will happen if ligaments are torn?
Answer» bones will be MOVE freely at joints. & no pain bone will be less movable at JOINT & PAINFUL bone will BECOME unfixed bone will become fixed Answer :B

Discussion

1077.	Question : What will happen if- i) A plasmid vector is digested with Eco RI at a single site ii) A sample of human DNA is digested with Eco RI. iii) The two samples (plasmid and human DNA) are allowed to hybridise in presence of DNA ligase.
Answer» Solution :i) It will produce two sticky ENDS. II) Human DNA pieces will also form sticky ends. iii) Some MOLECULES will form with the pieces of human DNA inserted into the plasmid VECTOR at the ECO RI site.

Discussion

1078.	Question : What will happen if all producers are removed from ecosystem?
Answer» Solution :Producers are the AUTOTROPHS which occupy the first tropic level in an ecosystem. The energy produced by them is utilized by the herbivores and then by CARNIVORES, thereby MAINTAINING the stability of ecosystem. If producers are removed from an ecosystem, it would lead to starvation and death of herbivores and subsequently the carnivores, THUS terminating the entire food web.

Discussion

1079.	Question : What will happen if a plasmid vector is digested with EcoR1 at a single site?
Answer» Solution :Restriction ENZYME EeoRl will cut OPEN the plasmid VECTOR with STICKY ends.

Discussion

1080.	Question : What will happen as the area increases the number of species ?
Answer» INCREASES DECREASES There is no CHANGE NONE SOLUTION :Increases

Discussion

1081.	Question : What will be the result, if the relationship between species richness and area for wide variety of taxa are plotted on a long scale?
Answer» SOLUTION :A RECTANGULAR HYPERBOLA.

Discussion

1082.	Question : What will be the result if there is a failure in the formation of synatptonemal complex. Give one example of organism where such condition is noticed ?
Answer» Solution :FAILURE in the formation of synaptonemal COMPLEX leads to the ABSENCE of CROSSING over to take place. It noticed in certain male species of DROSOPHILA.

Discussion

1083.	Question : What will be the phenotypic sex of the following organisms on the basis of the sex chromosomal constitution indicated againts each organism? Organism constitution(i) Human being (ii) Drosohila (iii) Human being(iv) DrosophilaSex chromosome Xo XO XXY XXYselect the correct answer using the codes givenl below
Answer» MALE (a) I and III Female II and Iv III and IV I and II II and IV I and III II and III I and IV Answer :D

Discussion

1084.	Question : What will be the ratio of the number of male gametes produced from one microsporemother cell to number of female gametesproducedfrom the megapose mother cell in flowering plants ?
Answer» `4:1` `1:1` `8:1` `16:1` ANSWER :C

Discussion

1085.	Question : What will be the pO_2the atmosphere to facilitate inspiration ?
Answer» 116 MM Hg 159 mm Hg 104 mm Hg 95 mm Hg Answer :B

Discussion

1086.	Question : What will be the PO2 and PCO2 in the atmospheric air compared to those in the alveolar air?
Answer» `P_(O_(2))` lesser, `P_(CO_(2))` P HIGHER `P_(O_(2))` higher, `P_(CO_(2))` P lesser `P_(O_(2))` higher, `P_(CO_(2))` P higher `P_(O_(2))` lesser, `P_(CO_(2))` P lesser Answer :B

Discussion

1087.	Question : What will be the Po_(2) and Pco_(2) in the alveolar air compared to those in the dead space air ?
Answer» <P>`P_(o_(2))` LESSER ,`P_(co_(2))` HIGHER `P_(o_(2))` higher ,`P_(co_(2))` lesser `P_(o_(2))` higher ,`P_(co_(2))` higher `P_(o_(2))` lesser ,`P_(co_(2))` lesser Answer :A

Discussion

1088.	Question : What will be the phenotypic ratio of offsprings of F_(2) generation obtained by selfing of F_(1) plant having AABbCC genotype
Answer» `3:1` `1:1` `0:3:3:1` `27:9:9:9:3:3:3:1` ANSWER :A

Discussion

1089.	Question : A carrier haemophilic female marries a normal male. What will be the phenotype of progeny ? Explain with suitable chart.
Answer» Solution :Chart showing cross between carrier FEMALE with normal male : (I) Carrier female crossed with normal male : (II) ( 1) If a carrier female `(X^(c)X^(c))` marries a male with normal vision `(X^(c)Y)` then all daughters will have normal vision. (2) But half of the daughters will be carriers for the colour blindness. (3) Half of the sons will be colour blind while remaining will have normal vision. (4) From the above CROSSES, it is obvious that the pattern of INHERITANCE of colour blindness is criss-cross.

Discussion

1090.	Question : What will be the phenotypic ratio in a situation of complementary gene interaction?
Answer» `9:7` `15:1` `13:3` `9:3:4` ANSWER :A

Discussion

1091.	Question : What will be the percentage of the tall plants with red flower in a cross between TTRr x ttrr, when T stands for tall dominant and R for red dominant ?
Answer» `25%` `50%` `75%` `100%` ANSWER :B

Discussion

1092.	Question : What will be the percentage inheritance of a disorder from an X-linked diseased father to his son.
Answer» 0 0.25 0.5 1 Answer :A

Discussion

1093.	Question : What will be the P/R ratio of a climax community and a pioneer community. What explanation could you offer for the changes seen in P/R ratio of a pioneer community and the climax community.
Answer» Solution :Production/Respiration late `((P)/(R))` ratio which Gross production and total group respiration and net group respiration when `P//R = 1` one stable result. This result may be INSTANTANEOUSLY daily one or over a longer period. If P/R is persistantly greater or less than/then ORGANIC matter either accumulates or is DEPLETED RESPECTIVELY.

Discussion

1094.	Question : What will be the parents' blood groups if the blood group of a child is AB ?
Answer» A and O B and O AB and O A and AB Answer :D

Discussion

1095.	Question : What will be the osmolarity of glomerular filtrate leaving the proximal convoluted tubule in normalhealthy person ?
Answer» 600 mOsm/L 400 mOsm/L 300 mOsm/L 1200 mOsm/L Answer :C

Discussion

1096.	Question : What will be the kind of children born to a normal father and carrier mother for the trait of haemophilia? Show it with the help of Punnett's square.
Answer» Solution : 50% GIRLS and BOYS are expected to be NORMAL and 50% boys haemophilic while 50% girls will be CARRIER for disease.

Discussion

1097.	Question : What will be the impact of water pollution on ecosystem?
Answer» Solution :DESTRUCTION of ecosystems: Ecosystems, especially aquatic SYSTEMS, can be severely affected or destroyed by water pollution. Water pollutants affect EXISTING niches and habitats and the survival of organisms. Soil fertility is affected and the SYSTEM becomes uninhabitable.

Discussion

1098.	Question : What will be the impact of global warming?
Answer» Solution :The large-scale global warming will have significant impact on people and nature. As global average temperatures rise, precipitation patterns could be affected. Extreme wet and dry conditions can be expected (flooding and desertification). Coastal areas shall become more vulnerable to storm SURGES as sea level rises. PLANT and animal species will migrate or disappear in response to climate change. • Global warming can directly affect the flora and FAUNA. This could ALSO result in shortage of food and even lead to food crisis, and affect the HEALTH of the people and organisms.

Discussion

1099.	Question : What will be the height of plant A_(1)A_(1)A_(0)a_(0) in the above cross of Q.24
Answer» 26 cm 48.5 cm 56 cm 22.5 cm Answer :B

Discussion

1100.	Question : What will be the frequency of the b allele in the next generation of the snail population described above ?
Answer» 0.2 0.3 0.45 0.55 Answer :C

Discussion

Explore topic-wise InterviewSolutions in .

Question : What would be the per cent growthor birth rate per individual per hour for the same population mentioned in the previous question ?

Question :What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its root tip cells ?

Question : What would be the molar concentration of human DNA in a human cell ? Consult your teacher.

Question : What would be the molar concentration of human DNA in a human cell. Consult your teacher

Question : What would be the molar concentration of human DNA can be studied by Electro-phoresis.

Question : What would be the number of chromosomes of aleurone cell of a plant with 42 chromosomes in its root tip cells?(A) 63(B) 84(C) 21(D) 42

Question : What would be theinpact on the environment around a thermal power plant if its electrostatic precipitatorfunctioning ? Give a reason.

Question : What would be the direction of the movement of water if two cells have the same OP but differ in TP?

Question : What would be the growth rate pattern, when the resources are unlimited ?

Question :What would be the correct base sequence in mRNA for the given DNA strand? 5'-AATGCCTTAAGC-3'

Question : What would be the cardiac output of a person having 72 heart beats per minute and a stroke volume of 50 mL?

Question : Whatwould be the base sequence of RNA transcript obtainedfrom the given DNA segment ? 5' - G C A T T C G G CT A G T A A C-3 Coding strand of DNA 3' - C G T A A G C C G A T C A T CA T T G-5' Non - coding strand of DNA

Question : What would be segregation pattern of ascospores in Neurospora asci in case of 'crossing over' of the type given below?

Question : What will you do to convert a bisexual flower into afemale so that it is cross pollinated artificially.

Question : What will these DNA codons be translated into TAC, AAA, ATC? (b) What are the DNA codons that would have transcribed these RNA codons AUGUUUUAG?

Question : What will happen when cut end of the shoot is dipped in eosin dye solution ?

Question : What will happen to the rate of photosysnthesis if rate of translocation of food is slow tha photosynthesis rate ?

Question : What will happen to an ecosystem if : (a) All producers are removed, (b) All organisms of herbivore level are eliminated, and (c) All top carnivore population is removed

Question : What will happen to an ecosystem if: (a) All producers are removed (b) All organisms of herbivore level are eliminated (c ) All top carnivore population is removed.

Question : What will happen to a well growing herbaceous plant in the forest if it is transplanted outside the forest in a park?

Question : What will happen to a well growing herbaceous plant in the forest if it is transplanted outside the forest in a park ?

Question : What will happen if Zona Pellucida gets damaged accidently?

Question : What will happen if the secretion of parietal cells of gastric glands is blocked with an inhibitor?

Question : What will happen if predator population becomes more efficient?

Question : What will happen if pleural fluid isabsent from pleural space?

Question :What will happen if ligaments are torn?

Question : What will happen if- i) A plasmid vector is digested with Eco RI at a single site ii) A sample of human DNA is digested with Eco RI. iii) The two samples (plasmid and human DNA) are allowed to hybridise in presence of DNA ligase.

Question : What will happen if all producers are removed from ecosystem?

Question : What will happen if a plasmid vector is digested with EcoR1 at a single site?

Question : What will happen as the area increases the number of species ?

Question : What will be the result, if the relationship between species richness and area for wide variety of taxa are plotted on a long scale?

Question : What will be the result if there is a failure in the formation of synatptonemal complex. Give one example of organism where such condition is noticed ?

Question : What will be the ratio of the number of male gametes produced from one microsporemother cell to number of female gametesproducedfrom the megapose mother cell in flowering plants ?

Question : What will be the pO_2the atmosphere to facilitate inspiration ?

Question : What will be the PO2 and PCO2 in the atmospheric air compared to those in the alveolar air?

Question : What will be the Po_(2) and Pco_(2) in the alveolar air compared to those in the dead space air ?

Question : What will be the phenotypic ratio of offsprings of F_(2) generation obtained by selfing of F_(1) plant having AABbCC genotype

Question : A carrier haemophilic female marries a normal male. What will be the phenotype of progeny ? Explain with suitable chart.

Question : What will be the phenotypic ratio in a situation of complementary gene interaction?

Question : What will be the percentage of the tall plants with red flower in a cross between TTRr x ttrr, when T stands for tall dominant and R for red dominant ?

Question : What will be the percentage inheritance of a disorder from an X-linked diseased father to his son.

Question : What will be the P/R ratio of a climax community and a pioneer community. What explanation could you offer for the changes seen in P/R ratio of a pioneer community and the climax community.

Question : What will be the parents' blood groups if the blood group of a child is AB ?

Question : What will be the osmolarity of glomerular filtrate leaving the proximal convoluted tubule in normalhealthy person ?

Question : What will be the kind of children born to a normal father and carrier mother for the trait of haemophilia? Show it with the help of Punnett's square.

Question : What will be the impact of water pollution on ecosystem?

Question : What will be the impact of global warming?

Question : What will be the height of plant A_(1)A_(1)A_(0)a_(0) in the above cross of Q.24

Question : What will be the frequency of the b allele in the next generation of the snail population described above ?