How can I give a smart answer to this question?

Question

Provide an overview of cellular respiration describing the three main parts:

Glycolysis
Krebs Cycle
Electron Transport Chain

I have a test on this tomorrow, and I don't understand what to do, please someone help me.

Answer 1

Here's a quick summary.

Glycolysis:
1. Breaks a molecule of glucose into two molecules of pyruvate.
2. Needs 2 ATP to get started, but makes 4 ATP, so has a net gain of 2 ATP.
3. Keeps some electrons on the carrier NAD+, forming NADH.
4. Happens in the cytoplasm.

Krebs Cycle
1. Happens in the mitochondria.
2. Breaks down the carbon molecules further, getting rid of carbon dioxide in the process.
3. Keeps some more electrons on the carriers NAD+ and FAD, forming NADH and FADH2.
4. Makes a small amount of ATP.

Electron transport chain
1. Happens on the inner membrane of the mitochondria.
2. Uses the electrons carried in all the NADH and FADH2 from previous stages.
3. Passes the electrons along the electron transport chain to generate most of the ATP of cellular respiration. Electrons (and H+) are picked up at the end of the chain by oxygen, forming molecules of water that diffuse out.