Question

At optimum temperature and pH, time required to reach maximum velocity of a reaction is 8 seconds, then what will be the time when substrate concentration is Km?

• A. 4 sec
• B. 16 sec
• C. 1 sec
• D. 2 sec

Answer 1

The correct option is A 4 sec

Michelis-menton reaction, calculates the rates of enzyme controlled reactions.

Where, V is the rate of reaction, V${}_{max}$ is the maximum rate achieved by the system

S is the substrate concentration

K${}_m$ is the substrate concentration where reaction rate is half of V${}_{max}$

Therefore the time taken for substrate concentration to reach K${}_m$ is 4secs

So, the correct answer is '4 sec'