Lecture 4 Flashcards Preview

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Flashcards in Lecture 4 Deck (21)
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0
Q

In glycolysis, __________ glucose and __________ pyruvate are involved.

A

1

2

1
Q

The four stages of the oxidation of glucose are:

A

Glycolysis
Pyruvate oxidation
Krebs cycle
Electron transport chain & chemiosmosis

2
Q

Glycolysis is a __________ step biochemical pathway.

A

10

3
Q

Glycolysis occurs in the __________.

A

Cytoplasm

4
Q

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

A

2

5
Q

Glycolysis gets __________ NADH from reduction of NAD^+.

A

2

6
Q

Cells use ATP to drive __________ reactions.

A

Endergonic

7
Q

Two mechanisms for ATP synthesis are :

A

Oxidative Phosphorylation

Substrate-Level Phosphorylation

8
Q

Substrate-Level Phosphorylation is when…

A

Phosphate is transferred directly to ADP.

9
Q

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

A

Eukaryotes

10
Q

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

A

Prokaryotes

11
Q

Products of pyruvate:

A

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

12
Q

The __________ oxidizes the Acetyl group on CoA.

A

Krebs Cycle

13
Q

The Krebs Cycle occurs in the __________ of the mitochondria.

A

Matrix

14
Q

Three stages if the Krebs Cycle:

A

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

15
Q

In the Krebs cycle, for each Acetyl-CoA…

A
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
16
Q

Glucose is oxidized to…

A

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

17
Q

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

A

53

18
Q

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

A

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

19
Q

What happens as Acetyl-CoA enters the Krebs Cycle?

A

Citrate is generated

20
Q

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

A

FADH_2 is generated