Question

Given below are two statements:
Statement (I): The rate of glycolysis is controlled by ATP consumption, \(NAD^{+}+H^{+}\) regeneration and enzymes like hexokinase, pyruvate kinase etc.
Statement (II): It is also controlled by hormones like glucagon, epinephrine and insulin.
In light of the above statements, choose the most appropriate answer from the options given below.

• A. Both Statement (I) and Statement (II) are correct.
• B. Both Statement (I) and Statement (II) are incorrect.
• C. Statement (I) is correct but Statement (II) is incorrect.
• D. Statement (I) is incorrect but Statement (II) is correct.

Hint:

Glycolysis is controlled by ATP use, NAD regeneration, key enzymes and hormones.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept
The rate of glycolysis changes according to the energy needs of the cell.

Step 2: Statement (I)
The rate depends on how fast ATP is used and how quickly NAD is regenerated from NADH. The key regulatory enzymes are hexokinase, phosphofructokinase and pyruvate kinase. So Statement (I) is correct.

Step 3: Statement (II)
Hormones also control it: insulin promotes glycolysis, while glucagon and epinephrine reduce it in the liver. So Statement (II) is correct.

Final Answer:
Both Statement (I) and Statement (II) are correct. \[ \boxed{\text{(A) }\text{Both Statement (I) and Statement (II) are correct.}} \]