Question

If a restriction enzyme has as its recognition sequence "ATCCTA", the number of restriction sites would appear in the lambda genome ($54,000bp$) is

• A. 13
• B. 9,000
• C. 2,250
• D. 7
• E. 10,000

Answer 1

The correct option is B 9,000

Restriction enzyme make a cut on recognition site ATCCTA which has 6 bases then the number of restriction site would appear in the lambda genome (54,000bp) is 9000 because when we divide the recognition site with 6 bases in the entire genome which has 54,000 bp we will get 9000 recognition sequences.

Thus, the correct answer is option B.