Aerobic Cellular Respiration

Question 1

What are the 4 stages of cellular respiration?

Answer 1

1. Glycolysis
2. Pyruvate Oxidation
3. Citric Acid Cycle (Krebs)
4. Electron Transport Chain + Chemiosmosis

Question 2

How many reactions are there in glycolysis and what molecule catalyzes them?

Answer 2

10 enzyme-catalyzed reactions in glycolysis.

Question 3

Where does glycolysis take place?

Answer 3

It takes place in the cytoplasm of all living cells

Question 4

What are the main reactant, intermediate molecule and product of glycolysis?

Answer 4

Glucose (6Cs), 2 G3P (3Cs), and 2 Pyruvate (3Cs)

Question 5

Describe the first 5 reactions of glycolysis.

Answer 5

2ATP are added to split glucose into 2 G3P

Question 6

Describe the products of oxidizing G3P into Pyruvate.

Answer 6

G3P is oxidized to produce 4ATP, 2 NADH and 2 molecules of pyruvate

Question 7

What is substrate level phosphorylation?

Answer 7

An enzyme is used to directly synthesize ADP and P into ATP, occurs in glycolysis and only accounts for around 2 percent of ATP production

Question 8

Describe Pyruvate Oxidation and it’s products

Answer 8

-Occurs in the matrix of the mitochondria
-oxidizes each molecule of pyruvate into:
1 acetyl-CoA, 1 NADH, 1 CO2

Question 9

What is the citric acid cycle?

Answer 9

occurs in the matrix, by the end the entire molecule of glucose is oxidized into CO2

Question 10

What are the products of the citric acid cycle?

Answer 10

1 acetyl-CoA –> 3 NADH, 1 FADH2, 2 CO2, 1 ATP

Question 11

Describe the ETC

Answer 11

describe:
proton gradient, oxidation of NADH and FADH2, using electron as energy and O2 as final electron receptor, mobile electron shuttles (UQ and cyt c)