Q. No.
E. Coli about to replicate was placed in a medium containing radioactive thymidine for five minutes. Then, it was made to replicate in a normal medium. Which of the following observation shall be correct?
| 1. | Both strands of DNA will be radioactive |
| 2. | One strand is radioactive |
| 3. | Each strand is half radioactive |
| 4. | None is radioactive |
Due to the discovery of which of the following in 1980, the evolution was termed as RNA world?
| 1. | m-RNA, t-RNA- rRNA synthesize proteins |
| 2. | In some viruses, RNA is the genetic material |
| 3. | RNA has enzymatic property |
| 4. | RNA is not found in all cells |
In Negative operon:
1. Inducer binds with repressor
2. Co-repressor does not bind with repressor
3. Corepressor binds with inducer
4. CAMP has a negative effect on the lac operon
Complete the flow chart on central dogma
| 1. | (a) - Replication; (b) - Transcription; (c) - Translation; (d) - Protein |
| 2. | (a) - Transduction; (b) - Translation; (c) - Replication; (d) - Protein |
| 3. | (a) - Replication; (b) - Transcription; (c) - Transduction; (d) - Protein |
| 4. | (a) - Transcription; (b) - Replication; (c) - Transcription; (d) - Transduction |
What is the role of RNA polymerase III in the process of transcription in eukaryotes?
1. Transcribes precursor of mRNA
2. Transcribes only snRNAs
3. Transcribes rRNAs (28S, 18S and 5.8S)
4. Transcribes tRNA, 5s rRNA and snRNA
DNA fingerprinting involves identifying differences in some specific regions in DNA sequence called:
| 1. | Single nucleotides | 2. | Polymorphic DNA |
| 3. | Satellite DNA | 4. | Repetitive DNA |
Identify the correct statement:
| 1. | The coding strand in a transcription unit is copied to an mRNA. |
| 2. | Split gene arrangement is characteristic of prokaryotes. |
| 3. | In capping, methylguanosine triphosphate is added to the 3' end of hnRNA. |
| 4. | RNA polymerase binds with the Rho factor to terminate the process of transcription in bacteria. |
If Adenine makes 30% of the DNA molecule, what will be the percentage of Thymine, Guanine and Cytosine in it?
| 1. | T:30 ; G:20 ; C:20 | 2. | T:20 ; G:25 ; C:25 |
| 3. | T:20 ; G:30 ; C:20 | 4. | T:20 ; G:20 ; C:30 |
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