Discussion
Home ‣ Biochemistry ‣ DNA Structure and Replication Comments
- Question
Okazaki fragments occur during
Options- A. transformation
- B. replication
- C. polymerase reaction
- D. synthesis
- Correct Answer
- replication
- 1. Which histone(s) are associated with the linker DNA of a nucleosome?
Options- A. Histone H1
- B. Histones H2A and H2B
- C. Histone H3
- D. Histone H4 Discuss
- 2. What is the only common methylation in the DNA of eukaryotes?
Options- A. Adenosine in GpA dinucleotides
- B. Guanosine in ApGpA trinucleotides
- C. Cytosine in CpG dinucleotides
- D. None of the above Discuss
- 3. Which is the largest among the followings?
Options- A. Nucleotide
- B. Nitrogenous base
- C. Phosphate
- D. Carbon Discuss
- 4. What is the main damaging effect of UV radiation on DNA?
Options- A. Depurination
- B. Formation of thymine dimers
- C. Single strand break
- D. Dehydration Discuss
- 5. In sperm heads, DNA is particularly highly condensed and the histones are replaced with small basic protein called
Options- A. protamines
- B. purines
- C. pyrimidines
- D. all of the above Discuss
- 6. DNA can be sequenced by the
Options- A. chemical method
- B. chain termination procedure
- C. both (a) and (b)
- D. physical method Discuss
- 7. DNA replication takes place in which direction?
Options- A. 3' to 5'
- B. 5 'to 3'
- C. Randomly
- D. Vary from organism to organism Discuss
- 8. 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
- 9. 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
- 10. 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
DNA Structure and Replication problems
Search Results
Correct Answer: Histone H1
Correct Answer: Cytosine in CpG dinucleotides
Correct Answer: Nucleotide
Correct Answer: Formation of thymine dimers
Correct Answer: protamines
Correct Answer: both (a) and (b)
Correct Answer: 5 'to 3'
Correct Answer: 5' ? 3' exonuclease activity
Correct Answer: octamer and 146 bp of DNA
Correct Answer: 80 to l00°C
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