CELL RESPIRATION
THE KREBS CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Detailed explanation-1: -Pyruvate-three carbons-is converted to acetyl CoA, a two-carbon molecule attached to coenzyme A.
Detailed explanation-2: -In general, the main energy source for cellular metabolism is glucose, which is catabolized in the three subsequent processes-glycolysis, tricarboxylic acid cycle (TCA or Krebs cycle), and finally oxidative phosphorylation-to produce ATP.
Detailed explanation-3: -Answer and Explanation: The types of molecules broken down through cellular respiration are organic molecules from three macronutrient classes, carbohydrates, lipids, and proteins.
Detailed explanation-4: -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.