Answered

When coenzyme A enters the Krebs cycle with a 2-carbon molecule, what happens?

AAn ATP molecule is produced.
BNADH is produced to go to the electron transport chain.
CA carbon dioxide molecule is released.
DA citric acid molecule is produced.

Verified Answer :

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The correct answer is D.

Acetyl CoA is condensed with a four carbon intermediate , oxaloacetate, to form citrate.  The citrate then goes through a series of chemical transformations , losing two carboxyl groups as CO2.

The Krebs  cycle serves two  main purposes namely.

1. to increase the cell's ATP producing potential by generating reduced electron carriers such as NADH and reduced ubiquinone.

2. to provide the cell with a variety of metabolic precursors which are one FADH and four NADH molecules