Identify the mitochondrion and its parts, explain cellular respiration, and differentiate between aerobic and anaerobic respiration.

Here are the answers to your questions:

3.1.1 The organelle in the diagram is a mitochondrion.

3.1.2 Identify part:

*a) A: Outer membrane

*b) B: Crista (or inner membrane fold)

3.1.3 The carbohydrate that is broken down during cellular respiration is glucose.

3.1.4 Two differences between aerobic and anaerobic respiration:

Feature	Aerobic Respiration	Anaerobic Respiration
Oxygen requirement	Requires oxygen	Does not require oxygen
Energy yield (ATP)	High (approximately 30-32 ATP per glucose)	Low (2 ATP per glucose)

3.1.5 The Krebs cycle (or citric acid cycle) occurs in the mitochondrial matrix. During this cycle, acetyl-CoA (derived from pyruvate) combines with a 4-carbon molecule to form a 6-carbon molecule. Through a series of reactions, carbon dioxide is released, and energy-carrying molecules such as ATP, NADH, and FADH2 are produced. The 4-carbon molecule is regenerated to continue the cycle, and the NADH and FADH2 proceed to the electron transport chain to generate more ATP.