KCET · BIOLOGY · STD 12 - 9. Biotechnology: Principles and Processes

From which bacterium the REN-Sal is isolated?

A Escherichia coli
B Streptococcus aureus
C Haemophilus influenzae
D Streptomyces albus

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Answer & Solution

Correct Answer

(D) Streptomyces albus

Step-by-step Solution

Detailed explanation

(D) Streptomyces albus,
The first letter used for restriction enzyme is the first letter of bacterium's genus name (in italics). Then comes the first two letters of its species (also in italics). The restriction endonuclease Sal I is obtained from Streptomyces albus.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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