Question Detail

BIO 101 BIO 101 Past Questions Objective Question
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Question

Which of these enzyme reactions is not irreversible in glycolysis?
Options
A Hexokinase
B Glucokinase
C 3-phosphoglylerate kinase
Correct Answer
D Phosphofructo kinase 1
Correct Answer

Option C is the correct answer.

Detailed Explanation

In glycolysis, three steps are considered irreversible under physiological conditions: those catalyzed by hexokinase/glucokinase, phosphofructokinase-1 (PFK-1), and pyruvate kinase. The reaction catalyzed by 3-phosphoglycerate kinase (which produces 3-phosphoglycerate and ATP) is reversible. Therefore, 3-phosphoglycerate kinase is not irreversible.

Hint

Which of these kinases catalyzes a reversible step in glycolysis?

Question Info

Course: BIO 101
Topic: BIO 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 1362 of 2556
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