Final answer:
In the Krebs cycle, oxaloacetate is attached to an acetyl group to form citrate.
Step-by-step explanation:
In the Krebs cycle, oxaloacetate is attached to an acetyl group to form citrate.
The citric acid cycle, also known as the Krebs cycle, is a series of biochemical reactions that take place in the mitochondria of cells. It plays a crucial role in the process of cellular respiration by harvesting energy from glucose molecules. Oxaloacetate, a four-carbon molecule, combines with acetyl-CoA to form the six-carbon citrate molecule. This is the first step in the Krebs cycle, where one acetyl group is attached to oxaloacetate to form citrate.