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Which of the following description(s) regarding cellular respiration is/are correct?

I. ATP hydrolysis is used to drive reactions that require an input of free energy.

II. The oxidation of food molecules forms ATP from ADP + Pi.

III. A transmembrane proton-motive force drives ATP synthesis.


a) I only b) I and II only c) I and III only d) II and III only e) I, II, and III

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Related questions

Question 1

Which of the following statements regarding photosynthesis and cellular respiration is true?

A.

Photosynthesis occurs in mitochondria, and cellular respiration occurs in chloroplasts.

B.

Photosynthesis occurs in chloroplasts, and cellular respiration occurs in mitochondria.

C.

Photosynthesis occurs in mitochondria and in chloroplasts.

Question 2

How do cells capture the energy released by cellular respiration?

A.

They produce glucose

B.

The energy is coupled to oxygen

C.

They produce ATP

Question 3

During redox reactions

A.

the loss of electrons from one molecule is called reduction

B.

electrons are lost from one substance and added to another substance

C.

protons from one molecule replace the electrons lost from another molecule

Question 4

Oxidation is the ________, and reduction is the ________.

A.

gain of oxygen; loss of oxygen

B.

loss of electrons; gain of electrons

C.

gain of protons; loss of protons

Question 5

During cellular respiration, NADH

A.

delivers its electron load to the first electron carrier molecule.

B.

is chemically converted into ATP

C.

is the final electron acceptor

Question 6

A drug is tested in the laboratory and is found to create holes in both mitochondrial membranes. Scientists suspect that the drug will be harmful to human cells because it will inhibit

A.

the citric acid cycle only.

B.

glycolysis only

C.

the citric acid cycle and oxidative phosphorylation

Question 7

Which of the following metabolic pathways is common in aerobic and anaerobic metabolism?

A.

glycolysis

B.

the citric acid cycle

C.

electron transport chain

Question 8

Which of the following is a result of glycolysis?

A.

production of CO2

B.

a net loss of two ATPs per glucose molecule

C.

conversion of glucose to two three-carbon compounds

which of the following statements regarding photosynthesis and cellular respiration is true?

OR

Briefly explain photosynthesis and cellular respiration.

 

1. Explain HOW ATP functions as asource of cellular energy for biochemical reactions and activetransport. Detailed answer required.

2. What is the function of NAD+ andFAD in glycolysis, CAC, and ETC for ATP synthesis? Of the C, H, andO atoms of the glucose molecule, which is/are most important forATP synthesis. Explain

3. Define substrate levelphosphorylation (SLP). Why are HETCs important for ATP synthesis?What is the amount of kinetic energy required to produce onemolecule of ATP by SLP?

4. In glycolysis, why must multipleenzymatic steps occur to convert glucose to two pyruvic acidmolecules? What are high energy transfer compounds? Explain indetail why two molecules of ATP must be consumed in stage 1 ofglycolysis. What is the purpose of the atomic rearrangements inglycolysis? In stage 1 of glycolysis, what is the significance ofthe rearrangement of glucose-6-phosphate tofructose-6-phosphate?

5. What is the importance of the citric acidcycle? Why must CoA be used in this pathway?

6. Define cellular respiration(CR). What are the significant features of cellularrespiration?

Is oxygen the only terminal electron acceptor (TEA) for CR inprokaryotic cells? Explain

7. Explain the functions of theETC. What role does H+ translocation and the TEA play in

the function of the ETC? Why is the proton motive forceessential for oxidative

phosphorylation?

8. Define the proton motive force(PMF). Explain HOW the PMF provides energy for

rotary catalysis of the ATP synthase used for oxidativephosphorylation.

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