Q.

EcoR I recognises a base sequence which has

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a

3 GC pairs and 3 AT pairs

b

4 GC pairs and 2 AT pairs

c

2 GC pairs and 4 AT pairs

d

2 AT pairs and 2 GC pairs

answer is C.

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Detailed Solution

EcoR I recognises a restriction site in DNA which has base sequence as 5! GAATTC 3!. Hence it has 2 GC pairs one at each end and 4 AT pairs in between these two.
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Get ₹ 1 crore* worth scholarship for JEE / NEET / Foundation
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