Tag: CSIR NET Life Science Previous Year Questions and Solution Genetics

12. Mutation in gene ‘X’ leads to lethality in a haploid organjsm. Which one of the following is best suited to analyse the function of gene ‘X’? (1) Pleiotropic mutants […]

Spontaneity of mutation means (1) Mutation in absence of exogenous mutagen (2) Mutation directly proportion to presence of mutagen (3) Mutation inversely proportion to presence of mutagen (4) Mutation at […]

10. An insertion of single nucleotide in coding region of gene leads to frameshift mutation and result is formation of nonfunctional protein. Under certain condition second suppressor mutation in another […]

9. Consider the following DNA sequence 5’-ATGGGCATAGACGATATGGTAG-3’. Insertion of G between 3rd and 4th position lead to frameshift mutation and non-functional protein synthesis. Which intragenic suppressor mutation will have minimum […]

8. In a lac operon, a nonsense mutation in the gene encoding beta-galactosidase was found to interfere with the expression of downstream permease and transacetylase genes. Which one of the […]

7. An bacterial operon contains three structural genes A, B, and C in the same order. If polar mutation occurs in gene B, then the effect in protein would be […]

6. If mutation changes codon in such a way that there is no effect on functioning and sequence of protein. This type of mutation is termed as (1) Silent mutation        […]

5. If substitution is the only possible type of mutation, then which technique would be no more useful for detecting them? (1) DNA sequencing (2) PCR amplification (3) Database searching […]

4. The frame shift mutation is induced by- (1) Nitrous oxide      (2) Acradines (3) EMS                   (4) UV rays Frame shift mutations occur due to insertion or deletion of nucleotides not […]

3. Point mutation in which there is deletion or addition of one base pair is termed as (1) Deletion              (2) Transition (3) Transversion       (4) Frame shift mutation A point mutation […]