Question

Neoschizomers are the restriction endonucleases with

• A. identical recognition site but different cleavage sites
• B. different recognition sites but same cleavage site
• C. different recognition site but producing same sticky ends
• D. identical recognition and cleavage sites

Hint:

To differentiate restriction enzymes, remember: neoschizomers = same recognition, different cut; isoschizomers = same recognition and same cut; isocaudomers = different recognition, same sticky ends.

Answer 1

The Correct Option is A

Step 1: Understand the concept of Neoschizomers.
Neoschizomers are a special type of restriction endonucleases that recognize the exact same DNA sequence (recognition site) as their prototype enzyme but cut at a different position within or near that sequence.

Step 2: Compare with Isoschizomers and Isocaudomers.
Isoschizomers: recognize and cut at the same site.
Neoschizomers: recognize the same site but cut at different locations.
Isocaudomers: recognize different sites but generate the same sticky ends.

Step 3: Evaluate the options.
Option (1) correctly describes neoschizomers.
Options (2), (3), and (4) describe other types of restriction enzymes or are incorrect.