MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Molecular Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following about the differences between the prokaryotic and eukaryotic genes are true? |
| A. | Prokaryotic genes are large, polycistronic and contain enhancers |
| B. | Eukaryotic genes are large, polycistronic and contain enhancers |
| C. | Prokaryotic genes are large, monocistronic and contain introns |
| D. | Eukaryotic genes are large, monocistronic and contain introns |
| Answer» E. | |
| 2. |
The most commonly observed modification in the histone includes ___________ |
| A. | Acetylation of lysine and phosphorylation of serine |
| B. | Acetylation of lysine and phosphorylation of threonine |
| C. | Acetylation of arginine and phosphorylation of threonine |
| D. | Acetylation of arginine and phosphorylation of serine |
| Answer» B. Acetylation of lysine and phosphorylation of threonine | |
| 3. |
Which of the following about the enhancer sequence is incorrect? |
| A. | They are required for transcriptional regulation of some genes |
| B. | They can work in both directions |
| C. | They can work when present in any position of the DNA |
| D. | They are not responsible for specificity of tissues |
| Answer» E. | |
| 4. |
With respect to the methylation of bases which of the following is correct? |
| A. | Protects against the action of S1 nuclease |
| B. | Methyl groups are added to cystine in eukaryotic cells |
| C. | It results in localized conversion of A-DNA to Z-DNA |
| D. | Involved in translation |
| Answer» D. Involved in translation | |
| 5. |
Acetylation of histone increases transcription of gene due to ___________ |
| A. | Increase in the DNA-histone interaction |
| B. | It loosens the DNA-histone complex thus making it accessible to RNA polymerase |
| C. | It induces DNA blending which is recognized by RNA polymerase |
| D. | The acetyl groups are recognizable by RNA polymerase |
| Answer» C. It induces DNA blending which is recognized by RNA polymerase | |
| 6. |
Gene imprinting involves ___________ |
| A. | DNA methylation |
| B. | DNA phosphorylation |
| C. | DNA glycosylation |
| D. | DNA oxidation |
| Answer» B. DNA phosphorylation | |
| 7. |
In the case of transcription regulation what is the function of enhancer molecules? |
| A. | Helps initiate transcription |
| B. | Transcription elongation |
| C. | Stimulates the rate of transcription |
| D. | mRNA stability enhancement |
| Answer» D. mRNA stability enhancement | |
| 8. |
Which of the following about the enhancers is false? |
| A. | They function in orientation |
| B. | They function as promoter sequences |
| C. | They work as both cis and trans-acting sequences |
| D. | They are tissue specific |
| Answer» C. They work as both cis and trans-acting sequences | |
| 9. |
Which of the following is not a target site for repressor molecules? |
| A. | Activators |
| B. | Mediators |
| C. | Co-repressors |
| D. | Promoter sites |
| Answer» E. | |