24277 + Interview Questions in Biology in Class 12 Page 478 InterviewSolution

23851.	Question : [A]: Chromosomes are divided into hetero- chromatin and euchromatin part. [R]: Heterochromatin are those regions of chromosome that remain condensed during interphase and early prophase, and rest of the non-condensed form of chromo- some is called euchromatin
Answer» If both A and R are true and R is the correct EXPLANATION of A If both A and R are true but R is not the correct explanation of A If A is true and R is false If both A and R are false ANSWER :A

Discussion

23852.	Question : [A]: Chromosomes appear longer during te-lophase. [R]: The term chromosome was coined by Waldeyer.
Answer» If both A and R are true and R is the CORRECT EXPLANATION of A If both A and R are true but R is not the correct explanation of A If A is true and R is FALSE If both A and R are false Answer :B

Discussion

23853.	Question : [A]: Chromatid is one of a pair of replicated chromosomes found during the prophase and metaphase stages of mitosis and meio- sis. [R]: Chromatin is classified as euchromatin or heterochromatin on the basis of stain-ing properties. Euchromatin is thqught to be ac- tively involved in transcription and, therefore, protein synthesis, while heterochromatin is inactive.
Answer» If both A and R are true and R is the correct EXPLANATION of A If both A and R are true but R is not the correct explanation of A If A is true and R is FALSE If both A and R are false Answer :B

Discussion

23854.	Question : A chromosome having more than two chromatids is called as…………….
Answer» SOLUTION :POLYTENE

Discussion

23855.	Question : [A]: Choroid plexus is one of two thin-walled greatly folded highly vascular regions in the inner wall of the brain through which ex- change of materials between blood and cerebrospinal fluid takes place. [R]: The choroid plexuses (which form the blood-brain barrier) bar the entry of blood cells and large molecules into the cerea brospinal fluid.
Answer» If both A and R are true and R is the CORRECT EXPLANATION of A If both A and R are true but R is not the correct explanation of A If A is true and R is false If both A and R are false Answer :B

Discussion

23856.	Question : A chimpanzee can hold objects by its hands and an elephant by its tusks. Are these two organs analogous or homologous? Give reason in support of your answer.
Answer» Solution :ANALOGOUS, because they perform the same function of holding OBJECTS but are TOTALLY different in origin.

Discussion

23857.	Question : A child with IQ of 140 belongs to the category :
Answer» GENIUS superior average most superior Answer :A

Discussion

23858.	Question : A child of 10 yrs is a intelligent as is normally expected in the child of 14 yrs IQ of this child would be
Answer» 110 100 140 160 Answer :C

Discussion

23859.	Question : A child has blood group O. If the father has blood group A and mother blood group B, work out the genotypes of the parents and the possible genotypes of the other offsprings.
Answer» SOLUTION :The child with blood group O will have homozygous recessive alleles. = Therefore, both the parents should be heterozygous i.e., the GENOTYPE of Father will be `I^A i` and MOTHER will be `I^B। ` =The other possible genotypes of offspring.s will be A, B and AB blood group.

Discussion

23860.	Question : A child of ten years is an intelligent as is normally expected in the child of fourteen years.IQ of this child would be:
Answer» 110 100 140 160 Answer :C

Discussion

23861.	Question : A child has PKU disorder, but neither parent has PKU. What is the genotype of the parents? Give reason for your answer.
Answer» Solution : Both the PARENTS of a PKU child will be heterozygous for this GENE. PKU is AUTOSOMAL RECESSIVE disorder. It appears only when the child is homozygous having both recessive genes. A PERSON heterozygous for PKU will be normal but having one normal and one defective gene.

Discussion

23862.	Question : A child has blood group IA IB and his mother has IBIB then child.s father cannot have
Answer» `I^A I^A` `I^A I^B` `I^B I^B` `I^A I^0` SOLUTION :`I^B I^B`

Discussion

23863.	Question : A chemosentive area is situated adjacent to respiratory rhythm centre. Which is highly sensitive to_____and ______ ions.
Answer» `O_(2), H^(+)` `CO_(2), OH^(–)` `CO_(2), H^(+)` `CO_(2), O_(2)` ANSWER :C

Discussion

23864.	Question : A chemical substance derived from a living source that has the capacity to inhibit growth or to destroy microbes is called:
Answer» VACCINE Toxoid Toxin Antibiotic Answer :D

Discussion

23865.	Question : A chemical widely used as antitranspirant
Answer» PMA ABA Silicon gels GA Answer :A

Discussion

23866.	Question : A chemical compound which is resistant to strong acid, alkali and enzymatic degradation is present in the
Answer» Endothecium cells of anther wall Cytoplasm of nucellus cells Sporoderm of pollen grains Seed coat of castor seeds Solution :Non- DISJUNCTION of homologous CHROMOSOMES leads to genomatic mutations or ANEUPLOIDY In klinfelter's syndrome , chromosome complement of inflicted INDIVIDUALS is 44 + XXY due to non disjunction of SEX chromosomes

Discussion

23867.	Question : A chemical signal that has both endocrine and neutral roles is:
Answer» Cortisol Melatonin Calcitonin Epinephrine Answer :D

Discussion

23868.	Question :A character, which is expressed in a hybrid is called
Answer» DOMINANT RECESSIVE Codominant Epistatic ANSWER :A

Discussion

23869.	Question : A change in the relative abandance of an allele (the allelic frequency) within a population over a succession of generations is called
Answer» MICROEVOLUTION or ADAPTIVE evolution macroevolution or speciation coevolt phylogenetic evolution Answer :A

Discussion

23870.	Question : A change in medium composition in a bacterial culture, results into growth of a specific section of that population. This section survived because:
Answer» These bacteria can CONVERT themselves according to changing medium These bacteria already had the gene that provides them SELECTIVE ADVANTAGE in changing medium These bacteria survived by chance Exact REASON can't be predicted Answer :B

Discussion

23871.	Question : A change in a sequence of DNA occurs so that the mRNA codon reads AUC rather than AUU. Both of these codes for the amino acid is leucine. Argue that this is not a mutation.
Answer» Solution :If ONE DEFINES a mutation as a change in genetic material RESULTING in a DIFFERENT phenotypic expression, then this is not a mutation.

Discussion

23872.	Question : A certain road accident patient with unknown blood group needs immediate blood transfusion. His one doctor friend at once offers his blood. What was the blood group of the donor?
Answer» BLOOD GROUP B Blood group AB Blood group O Blood group A Answer :C

Discussion

23873.	Question : A: chalazal vacuole is present in the help cell of embryo sac R: Polarity of synegid cytoplasm is opposite to egg cell
Answer» if both assetion A reason are ture and the reason is the CORRECT EXPLANATION of the ASSERTION then mark if both assertion & reason are ture and the reason is not the correct explanation of the assertin then mark if assertion is true STATEMENT but reason is false then mark if both assertion and reason are flase statements then mark Answer :B

Discussion

23874.	Question : A certain patient is suspected to be suffering from Acquired Immune Deficiency Syndrome. Which diagnostic technique will you recommend for its detection?
Answer» ELISA MRI Ultrasound WIDAL SOLUTION :ELISA

Discussion

23875.	Question : [A]: Cenromere is the primary constriction on the metaphase chromosome. [R]: It hE:lps to separate sister chromatids
Answer» If both A and R are true and R is the correct EXPLANATION of A If both A and R are true but R is not the correct explanation of A If A is true and R is FALSE If both A and R are false Answer :B

Discussion

23876.	Question : A cell when dipped in 0.5M sucrose solution has no effect, but when the same cell will be dipped in 0.5 M NaCl solution, it will:
Answer» INCREASE in size Decrease in size Will be turgid Will GET plasmolysed Answer :B

Discussion

23877.	Question : A cell swells up when kept in:
Answer» HYPOTONIC solution hypertonic solution isotonic solution none of these Answer :A

Discussion

23878.	Question : A cell plate is laid down during:
Answer» Cytokinesis Karyokinesis Interphase None of these Answer :A

Discussion

23879.	Question : A cell placed in a hypertonic solution 'will show__(endosmosis/exosmosis).
Answer» ANSWER :EXOSMOSIS

Discussion

23880.	Question : A cell membrane has
Answer» MIDDLE ELECTRON DENSE layer Middle electron TRANSPARENT layer Outer electron transparent layer Inner electron transparent layer Answer :B

Discussion

23881.	Question : A cell is placed in 0.5 M solution of sugar and no change in volume of cells is there,what is the concentration of cell sap?
Answer» 4M 5M 0.5M 50M Answer :C

Discussion

23882.	Question : A cell is placed in 0.5 M solution of sugar and no change in volume of cell is there, what is the conc. of cell sap?
Answer» 4M 5M 0.5M 50M Answer :C

Discussion

23883.	Question : A cell is heterozygous at three gene loci. How many different types of gametes can it form?
Answer» 2 3 6 8 Answer :D

Discussion

23884.	Question : A cell has 48 chromosomes at each pole in mitotic telophase. In this division the number of chromatids at the metaphase was :
Answer» 24 96 69 46 Answer :B

Discussion

23885.	Question : A cell coded protein that is formed in response to infection with most animal viruses is called:
Answer» histone vaccine antibody interferon Answer :D

Discussion

23886.	Question : A cell cycle consists of :-
Answer» MITOSIS and meiosis `G_(1)`, S, `G_(2)` phase Prophase, Metaphase, Anaphase and telophase Interphase and mitosis Answer :D

Discussion

23887.	Question : A cell can form many phenotypes. The propery is called
Answer» Pleuripotency Totipotency Parasexuality Parthenogenesis Answer :A

Discussion

23888.	Question : A cell at telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at telophase stage. There is no formation of cell plate and thus the cell is containing more number of chromosomes as compared to other dividing cells. This would result in
Answer» POLYPLOIDY somaclonal variation polyteny aneuploidy SOLUTION :polyploidy

Discussion

23889.	Question : A cell becomes fully turgid, if it is placed in
Answer» ISOTONIC solution Hypotonic solution Hypertonic solution Normal Solution Answer :B

Discussion

23890.	Question : A catecholamine is
Answer» DOPAMINE ADRENALINE NORADRENALINE All the above. Answer :D

Discussion

23891.	Question : A cavity in gastrula is .
Answer» Archenteron Blastocoel Haemocoel Hydrocoel Answer :A

Discussion

23892.	Question : A cartilaginous flap called _____prevents the entry of food into the ____, opening of the wind pipe-during_____.
Answer» ANSWER :EPIGLOTTIS, GLOTTIS, swalling,

Discussion

23893.	Question : [A]: Cabbage, cauliflower, Kohlrabi, Broccoli and Brussels have descended from a com- mon ancestor Colewort (Brassies oleracea).[R]: These varieties were produced through selective breeding (artificial selection) of do- mesticated wild species
Answer» If both A and R are TRUE and R is the CORRECT EXPLANATION of A If both A and R are true but R is not the correct explanation of A If A is true and R is false If both A and R are false ANSWER :A

Discussion

23894.	Question : A bust cellhas intracellular bacteria symbionts. If the growthrate of bacterialsymbiontis always10% higherthan that of the host cell,after 10generations of thehost cellthe density of bacteriain host cells will increase -
Answer» by `10%` two-fold ten-fold hundred-fold Solution :N//A

Discussion

23895.	Question : [A] : C_3 & C_4 cycle cannot occur in the same plant [R] : C_3 cycle is common in dicot & C_4 in monocots
Answer» If both A and R are TRUE and R is the CORRECT EXPLANATION of A If both A and R are true but R is not the correct explanation of A If A is true and R is FALSE If both A and R are false ANSWER :D

Discussion

23896.	Question : A burgler in a huff forgot to wipe off his blood strains from the place of crime where he was involved in a theft and fight. Which technique the crime branch personnel will use to help them identifying the burglar from the blood strains ?
Answer» SOLUTION :DNA FINGER PRINTING TECHNIQUE.

Discussion

23897.	Question :'A brief reduction in size of a population due to natural calamities usually leads to random genetic drift'. For this statement, identify the correct example from the following
Answer» HUMAN POPULATION of PITCAIRN island Polydactylic DWARFS in AMISH population Long-necked giraffe Industrial melanism Solution :Polydactylic dwarfs in Amish population

Discussion

23898.	Question : A :Breast feeding mother have least possibilities of conception. R : Menstrual cycle is not seen due to strong /heavy secretion of milk after parturition.
Answer» A & R are CORRECT , R is EXPLANATION of A A & R are correct , R is not the explanation of A A is correct, R is INCORRECT A is incorrect , R is correct Answer :A

Discussion

23899.	Question : A branchofethics,philosophy andsocialcommentarythatdealswiththebiologicalsciencesandtheir impactonsocietyis knownas
Answer» BIOETHICS BIOPATENT biopiracy biowar ANSWER :A

Discussion

23900.	Question : [A]: Brain does not affect in the absence of glucose. [R]: Glucose is stored in the neuron cells.
Answer» If both A and R are true and R is the correct EXPLANATION of A If both A and R are true but R is not the correct explanation of A If A is true and R is false If both A and R are false ANSWER :D

Discussion

Explore topic-wise InterviewSolutions in .

Question : [A]: Chromosomes are divided into hetero- chromatin and euchromatin part. [R]: Heterochromatin are those regions of chromosome that remain condensed during interphase and early prophase, and rest of the non-condensed form of chromo- some is called euchromatin

Question : [A]: Chromosomes appear longer during te-lophase. [R]: The term chromosome was coined by Waldeyer.

Question : A chromosome having more than two chromatids is called as…………….

Question : A chimpanzee can hold objects by its hands and an elephant by its tusks. Are these two organs analogous or homologous? Give reason in support of your answer.

Question : A child with IQ of 140 belongs to the category :

Question : A child of 10 yrs is a intelligent as is normally expected in the child of 14 yrs IQ of this child would be

Question : A child has blood group O. If the father has blood group A and mother blood group B, work out the genotypes of the parents and the possible genotypes of the other offsprings.

Question : A child of ten years is an intelligent as is normally expected in the child of fourteen years.IQ of this child would be:

Question : A child has PKU disorder, but neither parent has PKU. What is the genotype of the parents? Give reason for your answer.

Question : A child has blood group IA IB and his mother has IBIB then child.s father cannot have

Question : A chemosentive area is situated adjacent to respiratory rhythm centre. Which is highly sensitive to_____and ______ ions.

Question : A chemical substance derived from a living source that has the capacity to inhibit growth or to destroy microbes is called:

Question : A chemical widely used as antitranspirant

Question : A chemical compound which is resistant to strong acid, alkali and enzymatic degradation is present in the

Question : A chemical signal that has both endocrine and neutral roles is:

Question :A character, which is expressed in a hybrid is called

Question : A change in the relative abandance of an allele (the allelic frequency) within a population over a succession of generations is called

Question : A change in medium composition in a bacterial culture, results into growth of a specific section of that population. This section survived because:

Question : A change in a sequence of DNA occurs so that the mRNA codon reads AUC rather than AUU. Both of these codes for the amino acid is leucine. Argue that this is not a mutation.

Question : A certain road accident patient with unknown blood group needs immediate blood transfusion. His one doctor friend at once offers his blood. What was the blood group of the donor?

Question : A: chalazal vacuole is present in the help cell of embryo sac R: Polarity of synegid cytoplasm is opposite to egg cell

Question : A certain patient is suspected to be suffering from Acquired Immune Deficiency Syndrome. Which diagnostic technique will you recommend for its detection?

Question : [A]: Cenromere is the primary constriction on the metaphase chromosome. [R]: It hE:lps to separate sister chromatids

Question : A cell when dipped in 0.5M sucrose solution has no effect, but when the same cell will be dipped in 0.5 M NaCl solution, it will:

Question : A cell swells up when kept in:

Question : A cell plate is laid down during:

Question : A cell placed in a hypertonic solution 'will show__(endosmosis/exosmosis).

Question : A cell membrane has

Question : A cell is placed in 0.5 M solution of sugar and no change in volume of cells is there,what is the concentration of cell sap?

Question : A cell is placed in 0.5 M solution of sugar and no change in volume of cell is there, what is the conc. of cell sap?

Question : A cell is heterozygous at three gene loci. How many different types of gametes can it form?

Question : A cell has 48 chromosomes at each pole in mitotic telophase. In this division the number of chromatids at the metaphase was :

Question : A cell coded protein that is formed in response to infection with most animal viruses is called:

Question : A cell cycle consists of :-

Question : A cell can form many phenotypes. The propery is called

Question : A cell becomes fully turgid, if it is placed in

Question : A catecholamine is

Question : A cavity in gastrula is .

Question : A cartilaginous flap called _____prevents the entry of food into the ____, opening of the wind pipe-during_____.

Question : [A]: Cabbage, cauliflower, Kohlrabi, Broccoli and Brussels have descended from a com- mon ancestor Colewort (Brassies oleracea).[R]: These varieties were produced through selective breeding (artificial selection) of do- mesticated wild species

Question : A bust cellhas intracellular bacteria symbionts. If the growthrate of bacterialsymbiontis always10% higherthan that of the host cell,after 10generations of thehost cellthe density of bacteriain host cells will increase -

Question : [A] : C_3 & C_4 cycle cannot occur in the same plant [R] : C_3 cycle is common in dicot & C_4 in monocots

Question : A burgler in a huff forgot to wipe off his blood strains from the place of crime where he was involved in a theft and fight. Which technique the crime branch personnel will use to help them identifying the burglar from the blood strains ?

Question :'A brief reduction in size of a population due to natural calamities usually leads to random genetic drift'. For this statement, identify the correct example from the following

Question : A :Breast feeding mother have least possibilities of conception. R : Menstrual cycle is not seen due to strong /heavy secretion of milk after parturition.

Question : A branchofethics,philosophy andsocialcommentarythatdealswiththebiologicalsciencesandtheir impactonsocietyis knownas

Question : [A]: Brain does not affect in the absence of glucose. [R]: Glucose is stored in the neuron cells.

Question : A chemosentive area is situated adjacent to respiratory rhythm centre. Which is highly sensitive to_and __ ions.

Question : A cartilaginous flap called _prevents the entry of food into the , opening of the wind pipe-during_.