Three met E. coli mutant strains were isolated. To study the nature of mutation these mutant strains were treated with mutagens EMS or proflavins and scored for revertants. The results […]
Blog
Education
Identifying Mutagen from Amino Acid Sequence Changes in Gene X Mutation
The following is the amino acid sequence of a part of a protein encoded by gene ‘X’ ….Phe Leu Val Pro Ser Tyr Cys…. A mutant for gene ‘X’ is […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
Mutations Statements
26. The following are some statements made regarding mutations: A. Change of DNA sequence from AGC to ATC in non- coding strand can have a major impact on the protein […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
Identifying the Glycine Codon from Mutational Pathways
25. A protein has Gly at position 28 (wild type). On mutagenesis, a point mutation leads to conversion of Gly to Arg at position 28 (mutant 1). When mutant 1 […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
Understanding the Mutation Type Induced by 2-Aminopurine Base Analog
24. The base analog 2-aminopurine pairs With thymine, and can occasionally pair with cytosine. The type of mutation induced by 2-aminopurine is (1) transversion (2) Transition. (3) deletion (4) nonsense. […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
Deamination of 5-Methylcytosine Produces Thymine
23. Dearnination of bases is a common chemical event that produces spontaneous mutation. Which one of the following bases will be formed by deamination of 5-methylcytosine? (1) Uracil (2) Thymine […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
2-Aminopurine Induces Mutation by Base Pair Change
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 […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
DNA Intercalator
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 […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
5-Bromouracil Mutation
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 […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
Mutagen Causing Single Amino Acid Change
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 […]
