One turn of the helix in a B-form DNA is approximately of the length

1. 0.34 nm 2. 3.4 nm
3. 2 nm 4. 20 nm

Subtopic:  The DNA |
 83%
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Antiparallel strands of a DNA molecule means that

1. the phosphate groups of two DNA strands, at their ends, share the same position
2. the phosphate groups at the start of two DNA strands are in opposite position (pole)
3. one strand turns clockwise
4. one strand turns anti-clockwise

Subtopic:  The DNA |
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If A and C make 30% and 20% of DNA, respectively, what will be the percentage composition of T and G ?
1. T : 20%, G : 30% 2. T : 30%, G : 20%
3. T : 30%, G : 30% 4. T : 20%, G : 20%
Subtopic:  The DNA |
 87%
From NCERT
NEET - 2022
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