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DNA

If the base s...

Question

If the base sequence along one side of a DNA molecule is TTCGA then the complementary sequence of bases on the other side of the DNA molecule is:

A

AAGCT

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B

TTCGA

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C

GGTAC

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D

UUGCA

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Solution

The correct option is B AAGCT
DNA is made of four nitrogenous bases namely adenine, guanine, cytosine and thymine. Adenine pairs with thymine using two hydrogen bonds whereas guanine pairs with cytosine using three double bonds.
In the given sequence TTCGA the complementary sequence would be AAGCT.
So, the correct option is 'AAGCT'.

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