Multiple choice

Assertion: The inhibition of glycolysis by oxygen is referred to as Pasteur effect. Reason: This is due to inhibition of the enzyme phosphohexokinase by ATP and 2-hydroxypropane-1,2,3-tricarboxylate (formed in the presence of oxygen).

Directions: In the following question there are two statements, Assertion (A) and Reason (R), consider both the statements independently and mark your answers as under:
1. A and R both are correct and R is correct explanation of A.
2. A and R both are correct and R is not correct explanation of A.
3. A is correct and R is incorrect.
4. A is incorrect and R is correct.
5. A and R both are incorrect.

  1. A and R both are correct and R is the correct explanation of A.

  2. A and R both are correct and R is not the correct explanation of A.

  3. A is correct and R is incorrect.

  4. A is incorrect and R is correct.

  5. A and R both are incorrect.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Both Assertion (A) and Reason (R) are correct and R is the correct explanation of A. The inhibition of glycolysis by oxygen is referred to as Pasteur effect. This is due to inhibition of the enzyme phosphohexokinase by ATP and 2-hydroxypropane-1,2,3-tricarboxylate (citrate) (formed in the presence of oxygen).

Keep practicing — related questions