Lecture 4

Question 0

In glycolysis, __________ glucose and __________ pyruvate are involved.

Answer 0

1

2

Question 1

The four stages of the oxidation of glucose are:

Answer 1

Glycolysis
Pyruvate oxidation
Krebs cycle
Electron transport chain & chemiosmosis

Question 2

Glycolysis is a __________ step biochemical pathway.

Answer 2

10

Question 3

Glycolysis occurs in the __________.

Answer 3

Cytoplasm

Question 4

Glycolysis has a net production of __________ ATP molecules (substrate-level phosphorylation).

Answer 4

2

Question 5

Glycolysis gets __________ NADH from reduction of NAD^+.

Answer 5

2

Question 6

Cells use ATP to drive __________ reactions.

Answer 6

Endergonic

Question 7

Two mechanisms for ATP synthesis are :

Answer 7

Oxidative Phosphorylation

Substrate-Level Phosphorylation

Question 8

Substrate-Level Phosphorylation is when…

Answer 8

Phosphate is transferred directly to ADP.

Question 9

With oxygen, pyruvate is oxidized in mitochondria by pyruvate dehydrogenase in __________.

Answer 9

Eukaryotes

Question 10

With oxygen, pyruvate is oxidized on the plasma membrane in __________.

Answer 10

Prokaryotes

Question 11

Products of pyruvate:

Answer 11

Pyruvate + NAD^+ + CoA —> CO_2 + Acetyl-CoA + NADH

Question 12

The __________ oxidizes the Acetyl group on CoA.

Answer 12

Krebs Cycle

Question 13

The Krebs Cycle occurs in the __________ of the mitochondria.

Answer 13

Matrix

Question 14

Three stages if the Krebs Cycle:

Answer 14

Acetyl CoA + oxaloacetate —> citrate + CoA
Citrate rearrangement and decarboxylation
Regeneration of oxaloacetate

Question 15

In the Krebs cycle, for each Acetyl-CoA…

Answer 15

2 CO_2 are released
3 NAD^+ are reduced to 3 NADH
1 FAD is reduced to FADH_2
1 ATP is produced
Oxaloacetate and CoA are regenerated

Question 16

Glucose is oxidized to…

Answer 16

6 CO_2, 4 ATP, 10 NADH, and 2 FADH_2

Question 17

Electron transfer released __________ kcal/mol of energy gradually and used for ATP.

Answer 17

53

Question 18

True or False? When pyruvate is oxidized, ATP is generated.

Answer 18

False. Carbon dioxide is released, NADH is generated and Acetyl CoA is generated.

Question 19

What happens as Acetyl-CoA enters the Krebs Cycle?

Answer 19

Citrate is generated

Question 20

What happens last after Acetyl-CoA enters the Krebs cycle?

Answer 20

FADH_2 is generated