1. | transcriptional level (formation of the primary transcript) |
2. | processing level (regulation of splicing) |
3. | transport of mRNA from the nucleus to the cytoplasm |
4. | translational level |
Which of the following is likely if there is a mutation in the lacY gene of the lac operon in E.coli?
1. | The lac genes would be expressed efficiently only in the absence of lactose. |
2. | The lac genes would be expressed efficiently until the lactose supply in the cell is exhausted. |
3. | The lac genes would be expressed continuously. |
4. | Expression of the lac genes would cease immediately. |
What catalyzes the peptide bond formation in prokaryotes?
1. Proteases
2. A ribozyme
3. Sigma subunit of RNA polymerase
4. Rho factor proteins