Q. No.The initiation and termination factors required for prokaryotic transcription are respectively denoted as:
1. α and β 2. δ and θ 3. σ and ρ 4. Ψ and ɸ
The mRNA codon UGG is the codon for amino acid:
| 1. | Tryptophan | 2. | Phenylalanine |
| 3. | Valine | 4. | Glutamic acid |
In translation, the enzyme amino acyl-tRNA synthetase:
| 1. | synthesizes tRNA |
| 2. | attaches amino acids to tRNA |
| 3. | hydrolyzes excess tRNA molecules |
| 4. | helps tRNA synthesize amino acids |
The process of transcription and translation can be coupled in:
| 1. | E.coli | 2. | Saccharomyces cerevisiae |
| 3. | Arabidopsis thaliana | 4. | Coenorhabditis elegans |
E.coli has only 4.6 × base pairs and completes the process of replication within 18 minutes, then the average rate of polymerization is approximately:
| 1. | 2000 base pairs/second | 2. | 3000 base pairs/second |
| 3. | 4000 base pairs/second | 4. | 1000 base pairs/second |
After the transfer of E.coli from 15N to 14N medium, the DNA extracted from the medium after 40 minutes will compose of:
| 1. | Only hybrid DNA |
| 2. | Only light DNA |
| 3. | Equal amounts of light and heavy DNA |
| 4. | Equal amounts of light and hybrid DNA |
A cup has bacterial cells. Each bacterial cell divides in 35 minutes. What shall be the number of bacteria after 175 min?
| 1. | \(2 \times 10 ^ 5\) | 2. | \(5 \times 10 ^ 5\) |
| 3. | \(32 \times 10 ^ 5\) | 4. | \(16 \times 10 ^ 5\) |
During translation initiation in prokaryotes, a GTP molecule is needed in:
| 1. | Formation of formyl-met-tRNA |
| 2. | Binding of 30S subunit of the ribosome with mRNA |
| 3. | Association of 30 S-mRNA with formyl met-tRNA |
| 4. | Association of 50 S subunit of the ribosome with the initiation complex |
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. |
| Statement I: | The codon AUG' codes for methionine and phenylalanine. |
| Statement II: | AAA' and 'AAG are both codons that code for the amino acid lysine. |
In light of the above statements, choose the correct answer from the options given below:
| 1. | Statement I is correct but Statement II is false. |
| 2. | Statement I is incorrect but Statement II is true. |
| 3. | Both Statement I and Statement II are true. |
| 4. | Both Statement I and Statement II are false. |
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