CELL RESPIRATION
THE KREBS CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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1
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2
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4
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6
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Detailed explanation-1: -Thus, the correct answer is ‘3. ‘
Detailed explanation-2: -Krebs cycle produces the following: Two molecules of carbon dioxide are given off. One molecule of ATP is formed.
Detailed explanation-3: -1: Acetyl CoA and the Citric Acid Cycle: For each molecule of acetyl CoA that enters the citric acid cycle, two carbon dioxide molecules are released, removing the carbons from the acetyl group.
Detailed explanation-4: -These pyruvates then get converted into 2 acetyl CoA molecules. Each acetyl CoA enters into citric acid cycle and yields 3 NADH2 (9 ATP), 1 FADH2 (2 ATP) and 1 GTP (1 ATP). Therefore, altogether 12 ATP molecules will be produced from each mole of acetyl-CoA.
Detailed explanation-5: -Steps of the Krebs Cycle The Krebs cycle itself actually begins when acetyl-CoA combines with a four-carbon molecule called OAA (oxaloacetate) (see Figure above).