Discussion
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- Question
Retroviruses replicate via __________ intermediate
Options- A. RNA
- B. DNA
- C. mRNA
- D. rDNA
- Correct Answer
- DNA
- 1. What bands will be observed in a cesium chloride gradient after two rounds of replication?
Options- A. One light, one medium and one heavy band
- B. One light and one medium band
- C. One medium band
- D. One medium and one heavy band Discuss
- 2. Taylor, Woods and Hughes labeled Vicia DNA by allowing new DNA synthesis in the presence of radioactive thymine. After DNA replication (S phase of the cell cycle), it was observed that
Options- A. only one chromatid of a chromosome was labeled
- B. both chromatids of a chromosome were labeled
- C. both (a) and (b)
- D. neither chromatid was labeled Discuss
- 3. What is the range of melting point temperatures (Tm) for most DNA molecules?
Options- A. 50 to 60°C
- B. 60 to 80°C
- C. 70 to 90°C
- D. 80 to l00°C Discuss
- 4. The nucleosome consists of histone
Options- A. octamer and 146 bp of DNA
- B. tetramer and 146 bp of DNA
- C. hexamer and 146 bp of DNA
- D. none of the above Discuss
- 5. E.coli DNA polymerases II and III lack
Options- A. 5' ? 3' exonuclease activity
- B. 5' ? 3' endonuclease activity
- C. partially 5' ? 3' exonuclease activity
- D. partially 5' ? 3' endonuclease activity Discuss
- 6. Which of following RNA characteristically contains unusual purines and pyrimidmes?
Options- A. rRNA
- B. nRNA
- C. mRNA
- D. tRNA Discuss
- 7. What is the function of messenger RNA?
Options- A. It carries amino acids
- B. It is a component of the ribosomes
- C. It is a direct copy of a gene
- D. It is the genetic material of some organisms Discuss
- 8. The anticodon is a structure on
Options- A. mRNA.
- B. tRNA.
- C. aribosome.
- D. rRNA. Discuss
- 9. What modified base is at the 5' extremity of a capped eukaryotic m-RNA?
Options- A. 1-methyl-adenosine
- B. 2'-O-methyl-guanosine
- C. 7-methyl-guanosine
- D. 1-methyl-guanosine Discuss
- 10. A nicked RNA molecule can be ligated by
Options- A. T4 RNA ligase
- B. DNA polymerase
- C. T4 DNA ligase
- D. all of these Discuss
RNA Structure problems
Search Results
Correct Answer: One light and one medium band
Correct Answer: both chromatids of a chromosome were labeled
Correct Answer: 80 to l00°C
Correct Answer: octamer and 146 bp of DNA
Correct Answer: 5' ? 3' exonuclease activity
Correct Answer: tRNA
Correct Answer: It is a direct copy of a gene
Correct Answer: tRNA.
Correct Answer: 7-methyl-guanosine
Correct Answer: T4 DNA ligase
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