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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
Which one of the following makes use of RNA as a template to syntesize DNA-A. DNA dependant RNA polymeraseB. DNA polymeraseC. Reverse transcriptaseD. RNA polymerase |
| Answer» Correct Answer - C | |
| 152. |
Thte ultimate biological unit which controls heredity, is called :A. GenomeB. ChromosomeC. GenotypeD. Gene |
| Answer» Correct Answer - D | |
| 153. |
Genes for cytoplasmic male sterility in plants are located inA. chloroplast genomeB. mitochondrial genomeC. nuclear genomeD. cytosol |
| Answer» Correct Answer - B | |
| 154. |
Albinism in corn show :-A. Pothogenic effectB. Deficiency of lightC. Deficiency of mineralsD. lethal gene effect |
| Answer» Correct Answer - D | |
| 155. |
Extra nuclear inheritance is a consequence of presence of genes inA. Lysosomes and ribosomesB. Mitochondria and chloroplastsC. Endoplasmic reticulum and mitochondriaD. Ribosomes and chloroplast |
| Answer» Correct Answer - B | |
| 156. |
Segregation of genes takes place duringA. MethphaseB. AnaphaseC. ProphaseD. Embroyo formation |
| Answer» Correct Answer - B | |
| 157. |
An inheirted character and its detectable variant is termed as :-A. unit factorB. traitC. genctic profileD. genotypic character |
| Answer» Correct Answer - B | |
| 158. |
The natural rate of mutation is :-A. `1xx10^(-10)`B. `1xx10^(-6)`C. `1xx10^(5)`D. `1xx10^(10)` |
| Answer» Correct Answer - B | |
| 159. |
X- Rays cause mutation byA. Breaking spindle fibersB. Rupturing nuclear evenlopeC. Changing chromosome morphologyD. Inhibiting cytokinesis |
| Answer» Correct Answer - C | |
| 160. |
Which of the following is generally used for induced mutagenesis in crop plantsA. Gamma rays (from cobalt 60)B. Alpha particlesC. X raysD. UV (260 nm) |
| Answer» Correct Answer - A | |
| 161. |
Which of the following is significance of dominanceA. Organism with dominant genes are more vitalB. Harmful mutations are not expressed due to dominant geneC. Heterosis is due to dominant geneD. All the above |
| Answer» Correct Answer - B | |
| 162. |
An offspring of two homozygous parents differing from one another by alleles at only one gene locus is known as :-A. Back crossB. MonohybridC. DihybridD. Trihybrid |
| Answer» Correct Answer - B | |
| 163. |
Baldness in man is a :-A. Autosomal characterB. Sex linked characterC. Sex influenced characterD. 1 and 3 both |
| Answer» Correct Answer - D | |
| 164. |
Lack of indepenent assortment of two genes A and B in Fruit fly Drosophile is due to :A. Crossing overB. RepulsionC. RecombinationD. Linkage |
| Answer» Correct Answer - D | |
| 165. |
A normal woman whose father was colour blind is married to a normal man .The sons would be :A. All colour-blindB. `75%` colour-blindC. `50%` colour-blindD. All normal |
| Answer» Correct Answer - C | |
| 166. |
Assertion :- In Meselson and Stahl experiment `""^(15)NH_(4)Cl` can be separated from `""^(14)N ` by radiography. Reason : In `""^(15)NH_(4)Cl,""^(15)N` is a radioactive istope.A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.C. If Assertion is True but the Reason is Flase.D. If both Assertion & Reason are false. |
| Answer» Correct Answer - D | |
| 167. |
Assertion :- Essential life processes evolved around RNA. Reason : Beside genetic material RNA also act as catalyst.A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.C. If Assertion is True but the Reason is Flase.D. If both Assertion & Reason are false. |
| Answer» Correct Answer - A | |
| 168. |
A pleiotropic gene:A. controls multiple traits in an individualB. is expressed only primitive plantsC. is a gene evolvd during PlioceneD. controls a trait only in combination with another gene |
| Answer» Correct Answer - A | |
| 169. |
In his classic experiment on Pea plants, Mendel did not useA. Flower postionB. Seed colourC. Pod lengthD. Seed shape |
| Answer» Correct Answer - C | |
| 170. |
Identify the correct order of organisation of genetic material from largest to smallest :A. Chromosome, genome, nucleotide, geneB. Chromosome, gene, genome, nucleotideC. Genome, chromosome, uncleotide, geneD. Genome, chromosome, gene, nucletide |
| Answer» Correct Answer - D | |
| 171. |
A gene showing codominance has:A. both alleles independently expressed in the heterozgoteB. one allele dominant on the otherC. alleles tightly linked on the same chromosomeD. alleles that are recessive to each other |
| Answer» Correct Answer - A | |
| 172. |
Which of the following condition is true for codominance-A. Phenotype of `F_(1)` resembled either of the two parentsB. phenotype of `F_(1)` did not resemble either of two parentsC. Phenotype of `F_(1)` resembles both presentsD. None of these |
| Answer» Correct Answer - C | |
| 173. |
Which of the following is a good example of multiple allele-A. ABO blood groupsB. Size os starch grain in peaC. Shape of seedD. Flower colour in pea |
| Answer» Correct Answer - A | |
| 174. |
In sickle cell anaemia-A. The mutant haemoglobin molecule undergoes polymerisation under low oxygen tension causing the change in the shape of RBCB. Substitution of Glutamic acid by valine at the sixth position of the `alpha-`chain of haemoglobinC. The mutant hamoglobin undergoes polymerization under high oxygen tension causing the chage in shape of RBCD. `alpha-`globin chain is modified |
| Answer» Correct Answer - A | |
| 175. |
Sickle cell anaemia is an example of :-A. Frame shift mutationB. Point mutationC. Segmental mutationD. Gibberish mutation |
| Answer» Correct Answer - B | |
| 176. |
The most striking example of point mutation is found in a disease calledA. Sickle cell anaemiaB. Colour blindnessC. Laesh-Nyhn SyndromeD. Thallesemia |
| Answer» Correct Answer - D | |
| 177. |
When the phenotypic and genotypic ratios resemble in the `F_(2)` generation it is an example of :-A. Independent assortmentB. Qualitative inheritanceC. Segregation of factorsD. Incomplete dominance |
| Answer» Correct Answer - D | |
| 178. |
What is the genotypic and phenotypic ratio of monohybrid test cross :-A. `1:1`B. `1:2`C. `3:1`D. `1:2:1` |
| Answer» Correct Answer - A | |
| 179. |
Dihybrid cross proves the law of :-A. SegregatinB. Purity of gametesC. DominanceD. Independent assortment |
| Answer» Correct Answer - D | |
| 180. |
A trihybrid cross involve three pair of characters which will give rise to the `"F"_(1)` hybrids which are heterozygous for three genes. How many types of gametes will be produced in both male and female?A. 2B. 4C. 5D. 8 |
| Answer» Correct Answer - D | |
| 181. |
A trihybrid cross is made between two plants with genotypes A/a B/b C/c how many offspeings of such cross will have a genotype a/a b/b c/c-A. `1//64`B. `1//4`C. `1//16`D. `1//32` |
| Answer» Correct Answer - A | |
| 182. |
A normal woman whose father was albino marries an albino,what proportion of normal and albino can be expected among their offspring ?A. All normalB. 2 normal : 1 AlbinoC. All albinoD. 1 normal : 1 Albino |
| Answer» Correct Answer - D | |
| 183. |
A plant is heterozygous and is designated Bb and produces two kinds of gametes B and b. The probability of b gamete fertilising B or b is :-A. `1//2`B. `1//1`C. `0//1`D. `1//4` |
| Answer» Correct Answer - A | |
| 184. |
How many gametes are produced in `F_(1)` generation of a trihybrid :-A. 3B. 4C. 8D. 16 |
| Answer» Correct Answer - C | |
| 185. |
How many types & in what ratio the gametes are produced by a dihybrid heterozygous :-A. 4 types in the ratio of `9:3:3:1`B. 2 types in the ratio of `3:1`C. 3 types in the ratio of `1:2:1`D. 4 types in the ratio of `1:1:1:1` |
| Answer» Correct Answer - D | |
| 186. |
Dihybrid plants from how many types of pollen grains :-A. OneB. TwoC. FourD. Eight |
| Answer» Correct Answer - C | |
| 187. |
Which techniques is used by Mendel for hybridisationA. EmasculationB. BiggingC. Protoplast fusionD. 1 & both |
| Answer» Correct Answer - D | |
| 188. |
According to Mendelism shich character is shoeing dominance-A. Terminal position of folwerB. Green colour in seed coatC. Wrinkled seedsD. Green pod colour |
| Answer» Correct Answer - D | |
| 189. |
According to Mendelism which pair of character is showing dominance ?A. Terminal position of flower and green colour of seed coat.B. Wrinkled seeds and green colour of seed coat.C. Yellow pod and round seeds.D. Green pod and axial position of flower. |
| Answer» Correct Answer - D | |
| 190. |
When AABBcc is crossed with AaBbCc then the ratio of hybrid for all the three genes is :-A. `1//8`B. `1//4`C. `1//16`D. `1//32` |
| Answer» Correct Answer - A | |
| 191. |
When aaBBcc is crossed with AaBBcc then the ratio of huybrid for all the three genes is :-A. `1/8`B. `1/4`C. `1/16`D. `1/32` |
| Answer» Correct Answer - A | |
| 192. |
Which postulate of Mendel is still universal in nature ?A. Postulate IB. Postulate IIC. Postulate IIID. Postulate IV |
| Answer» Correct Answer - C | |
| 193. |
Allele is the :-A. Alternative from of gene pairB. Total number of genes for a traitC. Total number of chromosomes of a haploid setD. Total number of genes present on a chromosome |
| Answer» Correct Answer - A | |
| 194. |
In a random mating population frequency of disease causing recessive allele is `80%.` What would be the frequency of carrier individual in population :-A. `64%`B. `32%`C. `16%`D. `100%` |
| Answer» Correct Answer - B | |
| 195. |
When an `"F"_(1)` individual is crossed with its either of the two parents, the cross is known as:A. Test crossB. Back crossC. Reciprocal crossD. Monohybrid cross |
| Answer» Correct Answer - B | |
| 196. |
Genetic constitution of an individual is represented by :-A. GenomeB. GenotypeC. PhenotypeD. Karyotype |
| Answer» Correct Answer - B | |
| 197. |
A bacterium with completely radioactive DNA was allowed to reclicate in a non- radioactive medium for two generation what `%` of the bacteria should contain radioactive DNA:-A. `100%`B. `50%`C. `25%`D. `12.5%` |
| Answer» Correct Answer - B | |
| 198. |
How many contrasting traits of Pea pod were chosen by Mendel?A. 7B. 5C. 4D. 2 |
| Answer» Correct Answer - D | |
| 199. |
Marriage between close relatives should be avoided because it induces more:A. Recessive alleles to come togetherB. MutationsC. Multiple birthsD. Blood group abnormalities |
| Answer» Correct Answer - A | |
| 200. |
A normal DNA molecule is continuously replicate in `N^(15)` medium than what is the `%` of lighter DNA in `4^(th)` generation.A. `12.5%`B. `25%`C. `0%`D. `6.25%` |
| Answer» Correct Answer - C | |