8 Oxidative Phosphorylation and Photophosphorylation

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created 10 months ago by Jonathan_Miranda
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1

What is/ are the difference(s) between oxidative phosphorylation and photophosphorylation? (select all that apply)

A) Oxidative phosphorylation takes place in the chloroplast, while photophosphorylation takes place in the mitochondria.

B) Oxidative phosphorylation is a reduction reaction, while photophosphorylation is an oxidation reaction.

C) Oxidative phosphorylation can be either a light or dark reaction, while photophosphorylation is only a light reaction

D) Oxidative phosphorylation has a downhill electron flow, while photophosphorylation has an uphill electron flow.

B, C

2

What two molecules move electrons to the electron transport chain on the inner mitochondrial membrane during oxidative phosphorylation?

A) O2 and H2O

B) Ubiquinone and cytochromes

C) NADH and FADH2

D) NADH and NAD+

C

3

What is/are the function(s) of cytochromes? (select all that apply)

A) The iron is directly associated with inorganic sulfur or sulfur on cysteine residues.

B) They are iron containing electron transfer proteins.

C) They contain a quinone group that allows it to function as an electron carrier

D) None of the above

B

4

Which of the following is/are true regarding the electron transport chain? (select all that apply)

A) Energy is conserved in a proton gradient.

B) The proton gradient is potential energy that can be used to synthesize NADH.

C) The electrical potential inside the electron transport chain is positive.

D) The chemical potential inside the electron transport chain is alkaline.

A, D

5

In the electron transport chain, which complex is responsible for converting succinate to fumarate?

A) Complex I

B) Complex IV

C) Complex II

D) Complex III

C

6

Which of the following is NOT a regulator of the ATP-producing pathways?

A) FADH and FADH2

B) ATP, ADP, and AMP

C) Acetyl-CoA

D) Pi

A

7

Which of the following statements is/are NOT true regarding the transport of molecules across the inner mitochondrial membrane?

A) ATP crosses the inner membrane through adenine nucleotide translocase.

B) NADH electrons cross the inner membrane on a malate-alpha ketoglutarate transporter.

C) Pi crosses as H2PO4 through phosphate translocase.

D) Glutamate-aspartate transporter is needed to balance the malate-alpha ketoglutarate transporter.

E) All the above are true statements

E

8

During the light-dependent reaction of photophosphorylation, what molecule is released into the atmosphere?

A) ATP

B) Oxygen

C) Water

D) CO2

B

9

Which compounds are produced in the light-dependent reaction of photophosphorylation?

A) ADP and NADPH

B) ADP and NADP+

C) ATP and NADPH

D) ATP and NADP+

C

10

What two molecules are needed to start the carbon fixation cycle?

A) NADPH and ATP

B) ATP and ADP

C) ATP and CO2

D) NADP+ and ADP

A