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

22. 2- Aminopurine induces mutation by (1) Base pair change.   (2) Frameshift (3) Duplication             (4) Deletion 2-Aminopurine (2AP), an adenine base analog, primarily induces mutations through base pair changes, specifically […]

21. Which one of the following chemicals is a DNA intercalator? (1) 5-Bromouracil (2) Ethyl methane sulfonate (3) Acridine orange (4) UV Acridine orange is the correct DNA intercalator among […]

20. 5-Bromouracil is a base analog that can cause mutation when incorporated into DNA. Which of the following is the most likely change that 5-Bromouracil induces: (1) T:A to C:G           […]

19. Which of the following mutagens is most likely to results in a single amino acid change in a gene product? (1) Acridine orange    (2) X-rays (3) EMS                    (4) Ethidium […]

18. Ames test is used to evaluate mutagens in the environment. Which of the following statements, about Ames test are true? A. The mutagenic effect of a compound tested using […]

17. To replace animal use in testing hepatic toxicity of a drug on trial, which one of the following would be used in vitro to be closest to the in […]

16. The effect of nonsense mutation could be nullified by reversion as well as suppression. Which of the following processes will help to distinguish between the two kinds of revertants? […]

15. A hypothetical gene encodes a protein with the following amino acid sequence: Phe- Pro- Thr- Ala- Val-Arg- Ser A mutation of single nucleotide alters the amino acid sequence to […]

14. A gene encoding t-RNA undergoes a mutational event in its anticodon region that enables it to recognize a mutant nonsense codon and permit completion of translation. Such a mutation […]

13. Aspartic acid (Asp) is specified by the codon GAU and GAC. After mutation, Asp is changed to Alanine represented by GCX, where X may be A, U, C and […]