The Krebs cycle is a cyclic series of chemical reactions during which:
Correct answer: A. Oxidation process is completed
- A. Oxidation process is completed
- B. Decarboxylation process is completed
- C. Reduction process is completed
- D. Energy consuming process is completed
Explanation
The correct answer is that the oxidation process is completed in the Krebs cycle. This cycle involves the oxidation of acetyl-CoA, which leads to the production of NADH and FADH₂. These molecules carry electrons to the electron transport chain, where ATP is ultimately produced. The other options are misleading: while decarboxylation and reduction do occur, they are part of the cycle's processes rather than the end result. The cycle is not energy-consuming; rather, it prepares substrates for ATP generation.
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
Before the start of the Krebs cycle, the following changes occur, EXCEPT:
What is equivalent to half a glucose molecule that has been oxidized to the extent of losing two electrons as hydrogen atoms?
Pick up the energy-yielding process of glycolysis:
In the first step of the Krebs cycle, the following changes occur, EXCEPT:
In the Krebs cycle, for the formation of α-ketoglutarate, the following changes occur, EXCEPT:
FAD is reduced to get FADH₂ in a step of the Krebs cycle, which involves the conversion of: