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

a. an atp molecule is produced.
b. nadh is produced to go to the electron transport chain.
c. a carbon dioxide molecule is released.
d. a citric acid molecule is produced.

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

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs

a researcher conducts an experiment on the secretion of a particular hormone in mice. scientists inject mice with a substance that stimulates the production of the hormone. the scientists then test the levels of hormones produced by the mice. the tool used to measure the hormones consistently detects the levels at 10 points lower than the actual hormone levels in the mice. this tool makes measurements, but the measurements aren't .

explanation:

no u