Cellular Respiration: ch.9

Question 1

Step 1: Glycolysis

Answer 1

glucose is s converted into two molecules of pyruvate, a three-carbon organic molecule. In these reactions, ATP is made, and NAD+ is converted into NADH

Question 2

Step 2: Pyruvate oxidation

Answer 2

within the mitochondrial matrix, each pyruvate from glycolysis are converted into a two-carbon molecule bound to Coenzyme A known as acetyl CoA. next, Carbon dioxide is released and NADH is generated.

Question 3

Step 3: Citric acid cycle

Answer 3

The acetyl CoA goes through a cycle of reactions producing, ATP, NADH, and FADH2, and carbon dioxide is released.

Question 4

Step 4: Oxidative phosphorylation

Answer 4

The NADH and FADH2 deposit their electrons in the electron transport chain, turning back into their “empty” forms NAD+ and FADH2. As electrons move down the chain, energy is released and used to pump protons out of the matrix, forming a gradient. Protons flow back into the matrix through an enzyme called ATP synthase, making ATP. At the end of the electron transport chain, oxygen accepts electrons and protons to form water.

Question 5

Cellular Respiration

Answer 5

MENTION!!! Occurs both in the cytoplasm and mitochondria of eukaryotic cells.