Cellular Respiration (1 of 5): Inputs and Outputs (BioFlix tutorial) 12 of 16> P

Question

Cellular Respiration (1 of 5): Inputs and Outputs (BioFlix tutorial) 12 of 16> Part B-Acetyl CoA Formation In acetyl CoA formation, the carbon-containing compound from glycolysis is oxidized to produce acetyl COA. From the following compounds involved in cellular respiration, choose those that are the net inputs and net outputs of acetyl CoA formation. Drag each compound to the appropriate bin. If a compound is not involved in acetyl CoA formation, drag it to the "not input or output" bin. (Note that not all of the inputs and outputs of acetyl CoA formation are included.) View Available Hint(s) Reset Help weyl CoA NADH coenryme A NAD ADP ATT net input net output not input or output

Explanation / Answer

Glycolysis: it occurs in the cytoplasm of a cell and one glucose molecule (6 Carbon compound) is degraded into two molecules of pyruvate (3 Carbon compound). The degradation of glucose produces two molecules of NADH and four ATPs but two ATPs are utilized for glycolysis process so the net gain is two ATPs at the end of glycolysis.

The two pyruvate molecules produced in glycolysis do not directly enter into the Kreb’s cycle for further degradation. First, they are converted to acetyl coenzyme by the enzyme called pyruvate dehydrogenase which is multienzyme complex. The pyruvate undergoes oxidative decarboxylation and produces acetyl coenzyme A in the presence of pyruvate dehydrogenase enzyme. During this conversion NAD+ is reduced to NADH, one CO2 isreleased and one molecule of coenzyme A molecule is utilized.

Net input:

1. pyruvate

2. NAD+

3. coenzymeA

Net output:

1. CO2

2. NADH

3. acetyl CoA

Not input or output:

1. Glucose

2. ADP

3. ADP

4. O2

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