DNA is the material in the body that determines the height, colour of eyes, face and hair of children and future generations. DNA is a biochemical that consists of two strands, each having the shape of a:

circular staircase

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Solution

The correct option is A circular staircase
(A) circular staircase
DNA has the shape of a double helix, just like a circular staircase. Each molecule of DNA is a double helix formed from two complementary strands of nucleotides held together by hydrogen bonds between G-C and A-T base pairs.

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