Which enzyme polymerizes RNA with defined sequences in a template independent manner?
1. | Peptidyl transferase |
2. | RNA polymerase |
3. | Reverse transcriptase |
4. | Polynucleotide phosphorylase |
Which of the following is true for both transcription and DNA replication?
1. | The principle of complementarity governs the processes |
2. | Only if the two strands act as a template |
3. | Only a segment of both strands is involved |
4. | Adenine base pairs with thymine |
Histones are rich in amino acids:
1. | Arginine and Lysine |
2. | Arginine and Leucine |
3. | Arginine and Isoleucine |
4. | Aspartate and Glutamate |
The amino acid acceptor arm of the tRNA is at its:
1. | DHU loop | 2. | TψC loop |
3. | 5’ end | 4. | 3’ end |
RNA is not the genetic material in:
1. | Tobacco mosaic virus | 2. | QB bacteriophage |
3. | HIV | 4. | Archaebacteria |
The structure of the ribosome is made of:
1. | rRNA and Proteins |
2. | rRNA and Polysaccharides |
3. | mRNA, rRNA and tRNA |
4. | RNA, DNA and Proteins |
A molecule that can act as a genetic material must fulfil all the following criteria except:
1. | It should be able to generate its replica |
2. | It should chemically and structurally be stable |
3. | It should provide scope for rapid mutations |
4. | It should be able to express itself in the form of “Mendelian Characters” |
Insertion or deletion of how many bases will not cause a frameshift mutation?
1. | 1 | 2. | 2 |
3. | 3 | 4. | Any number |
What defines a coding and a template strand in the transcription unit?
1. | Structural gene | 2. | Ori |
3. | Terminator | 4. | Promoter |
The DNA dependent polymerases catalyze:
1. | Only in 3’ – 5’ direction |
2. | Only in 5’ – 3’ direction |
3. | In both directions |
4. | In neither directions |