Question
What is the condition required to observe B form of DNA? a) Low humidity b) High humidity c) Low temperature d) High temperature 2. What
What is the condition required to observe B form of DNA?
a) Low humidity
b) High humidity
c) Low temperature
d) High temperature
2. What is the condition required to observe A form of DNA?
a) Low humidity
b) High humidity
c) Low temperature
d) High temperature
3. How many bases are there in per turn of the B form of DNA?
a) 8 bp
b) 9 bp
c) 10 bp
d) 11 bp
4. Which of the following is not a character of A DNA?
a) Short and broad
b) Left handed helix
c) Narrow minor groove
d) Broad and shallow major groove
5. How many bases are there in per turn of the A form of DNA?
a) 11 bp
b) 10 bp
c) 12 bp
d) 8 bp
6. Which of the following is not a character of B form of DNA?
a) Longer and thinner
b) Right-handed helix
c) Narrow minor groove
d) Flat major groove
7. In a right handed DNA the glycosidic bond is in syn configuration.
a) True
b) False
View Answer
8. In the Z form of DNA the fundamental repeating unit is __________
a) Purine - pyrimidine nucleotide
b) Purine - pyrimidine dinucleotide
c) Purine - pyrimidine tri-nucleotide
d) Purine - pyrimidine tetra-nucleotide
9. What is the factor responsible for the left-handed helical conformation in Z form of DNA?
a) Syn conformation at pyrimidine
b) Anti conformation at pyrimidine
c) Syn conformation at purine
d) Anti conformation at purine
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