Today we know more than …….. restriction enzymes that have been isolated from over……..strains

1. 700; 350

2. 900; 230

3. 600; 270

4. 550; 210

Read the following statements

Statement-A : Restriction enzymes are obtained only from eukaryotes.

Statement-B : The first discovered restriction endonuclease was EcoRI.

Choose the correct option.

(1) Both statements are correct

(2) Both statements are incorrect

(3) Statement A is correct but B is incorrect

(4) Statement B is correct but A is incorrect

Restriction enzymes are synthesized by:

1. Bacteria only

2. Yeast and bacteria only

3. Eukaryotic cells only

4. All kinds of cells