Aerobic respiration

Question 1

What’s the first step of aerobic respiration if glucose is the carbon source?

Answer 1

Glycolysis

Question 2

What happens in the first half of glycolysis?

Answer 2

Glucose gets split into 2 G3P and uses 2 ATP

Question 3

What happens in the second half of glycolysis?

Answer 3

Each G3P undergoes a few more reactions to produce 2 pyruvate and produces 4 ATP by substrate-level phosphorylation and 2 NADH

Question 4

What is the net outcome of glycolysis?

Answer 4

Glucose is oxidized to 2 pyruvate, 2 NADH are produced, and get a net production of 2 ATP (2 used, 4 produced)

Question 5

What’s the second step of aerobic respiration?

Answer 5

Citric acid cycle

Question 6

What happens to pyruvate before entering the CAC?

Answer 6

Gets oxidized into CO2 and Acetyl-CoA and makes another NADH

Question 7

How does acetyl-CoA enter the CAC?

Answer 7

Reacts with oxaloacetate to become citric acid, then enters the cycle

Question 8

What is the net outcome of the citric acid cycle?

Answer 8

6 NADH, 2 FADH2, 2 GTP and oxaloacetate is regenerated

Question 9

What is the third step of aerobic respiration?

Answer 9

Oxidative phosphorylation

Question 10

How is the PMF generated?

Answer 10

The electron shuttles bring their electrons to the ETC components in the membrane and drop them off at the first one. The electrons then move from one carrier to the next and release energy at each jump. The energy released by the electrons is used to power a proton pump to pump one proton across the membrane

Question 11

What is the terminal electron acceptor of aerobic respiration?

Answer 11

Oxygen

Question 12

What does oxygen become when it accepts the electrons from the ETC?

Answer 12

Water

Question 13

Why is aerobic respiration considered to be the best system?

Answer 13

Starting from NADH and going to oxygen releases the most energy possible

Question 14

Where in aerobic respiration does most of the ATP come from?

Answer 14

Oxidative phosphorylation