21. A protein is phosphorylated at a serine residue. A phosphomimic mutant of the protein can be generated by substituting that serine with
22. Under alkaline conditions, DNA is more stable than RNA because
23. True breeding Drosophila flies with curved wings and dark bodies were mated with true breeding short wings and tan body Drosophila, The F1 progeny was observed to be with curved wings and tan body. The F1 progeny was again allowed to breed and produced flies of the following phenotype, 45 curved wings tan body, 15 short wings tan body, 16 curved wings dark body and, 6 short wings dark body. The mode of inheritance is
24. The enzyme which adds phosphate group to the free 5' terminus of a DNA sequence is
25. The fundamental feature of the genetic code which allows the expression of a protein in any host is its
26. Match the terms in Group I with their possible explanation in Group II
Group I
Group II
P. Orthologs
1. A cell or an organism, having foreign gene
Q. Paralogs
2. The complement of a protein expressed by a genome
R. Proteome
3. Genes from different species related to each other
S. Transgenic
4. Genes from same species related to each other
| Group I | Group II |
| P. Orthologs | 1. A cell or an organism, having foreign gene |
| Q. Paralogs | 2. The complement of a protein expressed by a genome |
| R. Proteome | 3. Genes from different species related to each other |
| S. Transgenic | 4. Genes from same species related to each other |
27. Which one of the following amino acids in proteins does not undergo phosphorylation?
28. In eukaryotes, the ribosomal RNA genes are transcribed by
29. The repeat sequence of telomere in humans is
30. Match the terms in Group I with their associated functions in Group II.
Group I
Group II
P. Shine-Dalgarno sequences
1. Aminoacylation of tRNA
Q. Leucine zipper
2. Gene silencing
R. Aminoacyl tRNA synthetase
3. Ribosome binding and facilitation of translation initiation
S. RNA interference (RNAi)
4. Transcription factors
| Group I | Group II |
| P. Shine-Dalgarno sequences | 1. Aminoacylation of tRNA |
| Q. Leucine zipper | 2. Gene silencing |
| R. Aminoacyl tRNA synthetase | 3. Ribosome binding and facilitation of translation initiation |
| S. RNA interference (RNAi) | 4. Transcription factors |