AP BIOLOGY

CELL RESPIRATION

THE KREBS CYCLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How many carbons are there in the pyruvate?
A
1
B
2
C
3
D
4
Explanation: 

Detailed explanation-1: -Pyruvate-three carbons-is converted to acetyl CoA, a two-carbon molecule attached to coenzyme A .

Detailed explanation-2: -The breakdown of glucose, a six-carbon molecule, into a three-carbon molecule called pyruvate takes place in the cytoplasm.

Detailed explanation-3: -The three-carbon molecule that is the final product of glycolysis is pyruvate.

Detailed explanation-4: -Each Acetyl CoA consists of 2 carbon atoms. During glycolysis, two molecules of pyruvic acid, a 3-carbon atom molecule, formed and undergo oxidative decarboxylation in presence of coenzyme A to produce the Acetyl CoA complex.

Detailed explanation-5: -Pyruvic acid seems to cause the outer layer of skin cells to slough off, which might benefit some skin conditions. People use pyruvate for obesity, acne, high cholesterol, cataracts, athletic performance, and many other conditions, but there is no good scientific evidence to support most of these uses.

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