A competitive inhibitor of succinic dehydrogenase is:
Correct answer: C. Malonate
- A. Alpha-ketoglutarate
- B. Malate
- C. Malonate
- D. Oxaloacetate
Explanation
Malonate is a competitive inhibitor of succinic dehydrogenase. It mimics the structure of succinate, the natural substrate, allowing it to bind to the enzyme's active site and block succinate from binding. This inhibition can slow down the Krebs cycle. The other options, alpha-ketoglutarate, malate, and oxaloacetate, are substrates or intermediates in the Krebs cycle but do not inhibit the activity of succinic dehydrogenase.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Bioenergetics
Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.
Practise Bioenergetics
1,378 free Bioenergetics MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Bioenergetics questions
The overall goal of glycolysis, the Krebs cycle, and the electron transport system is the formation of:
How any ATP are formed per glucose molecule in Krebs cycle?
In glycolysis, during oxidation electrons are removed by:
Fermentation products produced by the yeast are:
Lactic acid is produced as a result of:
What is the product of the ETC in animals?