EVERYDAY SCIENCE

SCIENCE

RESPIRATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which molecule is the product of Glycolysis and the reactant of the Krebs Cycle?
A
pyruvic acid
B
carbon dioxide
C
water
D
oxygen
Explanation: 

Detailed explanation-1: -Pyruvate, the product from glycolysis, is transformed into acetyl CoA in the mitochondria for the next step. The citric acid cycle, where acetyl CoA is modified in the mitochondria to produce energy precursors in preparation for the next step.

Detailed explanation-2: -In this stage, the products of glycolysis are converted into the reactants of the Krebs cycle. The final product of glycolysis is a pyruvate molecule. The pyruvate molecule is transported from the cytoplasm, the site of glycolysis, to the mitochondria for the rest of the cellular respiration processes.

Detailed explanation-3: -The Krebs cycle uses the two molecules of pyruvic acid formed in glycolysis and yields high-energy molecules of NADH and flavin adenine dinucleotide (FADH2), as well as some ATP.

Detailed explanation-4: -The final product of glycolysis is pyruvate in aerobic settings and lactate in anaerobic conditions. Pyruvate enters the Krebs cycle for further energy production.

Detailed explanation-5: -Pyruvate is a biological molecule and product of glucose metabolism that reacts with adenosine triphosphate and carbon dioxide, converting it into acetyl-CoA and adenosine diphosphate (ADP) at the beginning of the TCA cycle. It is often included in the introductory or preliminary step of the cycle.

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