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 |
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I: | It is the metabolic, physiological, or environmental conditions that regulate the expression of genes. |
II: | The development and differentiation of embryos into adult organisms are also a result of the coordinated regulation of the expression of several sets of genes. |
1. | Only I | 2. | Only II |
3. | Both I and II | 4. | Neither I nor II |
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Assertion (A): | In a transcription unit, the activity of RNA polymerase at a given promoter is in turn regulated by interaction with accessory proteins. |
Reason (R): | These regulatory proteins can act both positively (activators) and negatively (repressors). |
1. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
2. | Both (A) and (R) are false. |
3. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
4. | (A) is true but (R) is false. |
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