Which of the following statements is true?

The citric acid cycle occurs in the mitochondria matrix.

Glycolysis occurs in the mitochondria inner membrane.

Oxidative phosphorylation occurs in the mitochondria matrix.

The citric acid cycle occurs in the cytosol.

Electron transport chain and ATP synthase are in the cytosol.

Cellular respiration produces the most energy in the form of ATP from which of the following?

substrate-level phosphorylation

Which of the following statements is TRUE of both aerobic and anaerobic respiration?

Both use glycolysis to oxidize glucose to pyruvate and both produce NADH as high-energy intermediates.

Both use glycolysis to oxidize glucose to pyruvate.

Both produce NADH as high-energy intermediates.

Both produce either lactic acid or ethanol as a biproduct.

Both produce NADH as high-energy intermediates and both produce either lactic acid or ethanol as a biproduct.

Which is an immediate effect of blocking the activity of mitochondrial ATP synthase?

The pH in the space between the mitochondrial membranes would decrease.

The pH in the space between the mitochondrial membranes would increase.

Oxygen consumption would decrease.

The concentration of NADH would increase.

Reflect on Process: Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result? Section: 07.05 Topic: Overview of Oxidative Phosphorylation Bloom's: 3. Apply (Socratic Feedback) Accessibility: Keyboard Navigation LO: 07.05.02 Explain how ATP synthase utilizes the H electrochemical gradient to synthesize ATP. Which of the following best explains how ATP synthase utilizes the H + electrochemical gradient to synthesize ATP?

ATP synthase uses the flow of H + ions down their electrochemical gradient to drive the synthesis of ATP from ADP and inorganic phosphate.

ATP synthase breaks down ATP to create a H + gradient across the membrane.

ATP synthase directly transfers electrons to ADP to form ATP.

ATP synthase uses oxygen as a substrate to produce ATP.

How is a gradient of H+ ions formed across the inner mitochondrial membrane?

The electron transport chain uses energy from transfer of an electron donated by NADH to pump H+ across the inner mitochondrial membrane against its electrochemical gradient.

Electrons move from NADH to a chain of proteins with lower electronegativities.

The electron transport chain uses ATP to pump H+ across the inner mitochondrial membrane against its electrochemical gradient.

ATP synthase generates a H+ gradient across the inner mitochondrial membrane.

The electron transport chain of proteins contains pores that are leaky to H+.

The ATP made during glycolysis is generated by

substrate-level phosphorylation.

During the cleavage stage of glycolysis, fructose-1, 6 biphosphate is broken down into

two molecules of glyceraldehyde-3-phosphate.

How do the concentrations of O2 and CO2 in inhaled air compare with exhaled air?

Inhaled air has more O2 and less CO2 than exhaled air.

Inhaled air has more O2 and CO2 than exhaled air.

Inhaled air has less O2 and CO2 than exhaled air.

Inhaled air has less O2 and more CO2 than exhaled air.

The reaction of ethanol fermentation is: pyruvate + NADH → ethanol + CO2 + NAD+. Why would a yeast need to perform this reaction in the absence of oxygen?

to produce NAD+ allowing glycolysis to continue

to produce NAD+ allowing the electron transport chain to run

to consume excess pyruvate that cannot enter the Krebs cycle

NADH is necessary to reduce pyruvate to lactate

When heart muscle cells are deprived of oxygen, the heart still pumps for some time. What must the heart cells be able to do?

derive sufficient energy from fermentation

continue aerobic metabolism when skeletal muscle cannot

transform lactate back to pyruvate

Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?

The problem-solving process should be reviewed to identify breakdowns and revised for better results.

The problem-solving process never needs revision.

Breakdowns in the process are irrelevant to the outcome.

Revising the approach is unnecessary if the answer is incorrect.

In a PET scan a patient is injected with radioactively labeled glucose. Why would cancer cells take up more of the radioactive glucose than surrounding noncancerous tissues?

Because they produce more enzymes found in glycolysis.

Because they require more oxygen to metabolize glucose.

Because they are more sensitive to radiation.

Because they are less sensitive to radiation.

Because they rely more on oxidative phosphorylation than glycolysis to produce ATP.

In a PET scan, a patient is injected with radioactively labeled glucose. Cells take up the radioactive glucose and the scanner detects levels of radioactivity in various parts of the body. This is a measure of the amount of glucose uptake. Cancer cells are often in an environment with low oxygen concentration and they take in high amounts of glucose. Why would a low oxygen environment lead to high glucose uptake?

They rely more on glycolysis which is less efficient than oxidative phosphorylation.

Because they require more oxygen to metabolize glucose.

They rely more on oxidative phosphorylation which is less efficient than glycolysis.

More energy is produced from glucose in hypoxic conditions.

Enzymes function more efficiently in the absence of oxygen.

In the reaction: pyruvate + CoA + NAD+ → acetyl CoA + CO2 + NADH.

Pyruvate is oxidized and NAD+ is reduced.

Pyruvate is reduced and NAD+ is oxidized.

Pyruvate is oxidized and CoA is reduced.

Pyruvate is reduced and CoA is oxidized.

CH 7 BIO

Authored by alia aljaberi

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12th Grade

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the equation, C6H12O6 + 6O2 → 6CO2 + 6H2O, ATP and heat would be on which side of the reaction?

The products because this is an exergonic reaction.

The products because this is an endergonic reaction.

The reactants because this is an exergonic reaction.

The reactants because this is an endergonic reaction.

It could appear on either side because this reaction is in equilibrium.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The equation, C6H12O6 + 6O2 →6CO2 + 6H2O (ATP + Heat), describes which of the following processes?

photosynthesis

cell respiration

cell fermentation

glycolysis

anaerobic metabolism

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following are the final by-products of glucose oxidation during aerobic cell respiration?

ATP only

heat only

carbon dioxide only

both ATP and heat only

ATP, heat, and carbon dioxide

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following processes will occur in the presence or absence of oxygen?

glycolysis

electron transport chain

oxidative phosphorylation

cellular respiration

citric acid cycle

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Where does glycolysis takes place?

mitochondrial matrix

mitochondrial membrane

mitochondrial inner membrane

mitochondrial intermembrane space

cytosol

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which occurs only in anaerobic metabolism of glucose?

citric acid cycle

glycolysis

acetyl CoA formation

oxidative phosphorylation

lactate fermentation

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following are produced during the citric acid cycle?

ATP and NAD+

oxygen

ATP, NADH, and FADH2

pyruvate, ATP and NADH

a proton gradient

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CH 7 BIO

In the equation, C6H12O6 + 6O2 → 6CO2 + 6H2O, ATP and heat would be on which side of the reaction?

The equation, C6H12O6 + 6O2 →6CO2 + 6H2O (ATP + Heat), describes which of the following processes?

Which of the following are the final by-products of glucose oxidation during aerobic cell respiration?

Which of the following processes will occur in the presence or absence of oxygen?

Where does glycolysis takes place?

Which occurs only in anaerobic metabolism of glucose?

Which of the following are produced during the citric acid cycle?

Which of the following statements is true?

Which compound has the highest free energy and produces the most ATP per molecule when oxidized?

Cellular respiration produces the most energy in the form of ATP from which of the following?

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