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Question
Given below is a schematic diagram of a portion of DNA.
- How many strands are shown in the diagram?
- How many nucleotides have been shown in each strand?
- Name the parts numbered 1, 2, 3, 4 and 5 respectively.
- Name the DNA unit constituted by the parts 1, 2, 3 collectively.
Solution
- Two parallel strands.
- Two on each strand.
- (1) Phosphate, (2) Sugar, (3) Pyrimidines, (4) Hydrogen Bond and (5) Purines.
- Nucleotides.
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