Ch 7 Practice Quiz

Do plants carry out cellular respiration?

True

Is glycolysis an efficient pathway for extracting energy from glucose?

False

What statement concerning cellular respiration is false?

The metabolic breakdown of glucose yields more energy during fermentation than during aerobic respiration.

During respiration, most ATP is formed as a direct result of the net movement of what?

Protons (H+ ions) down a concentration gradient.

Which cellular process is coupled with the hydrolysis of ATP?

Active Transport.

What process releases CO2 as a by-product of oxidation-reduction reactions?

Krebs cycle (citric acid cycle).

What process is found in both photosynthesis and cellular respiration?

Chemiosmosis.

In which process is sugar oxidized to pyruvic acid?

Glycolysis.

Why can oxygen consumption be used as a measure of metabolic rate?

Oxygen is necessary for ATP synthesis by oxidative phosphorylation.

Which pathway for the transport of cellular energy most likely evolved first?

Glycolysis.

In cellular respiration, oxygen is directly involved in which process?

Accepting electrons at the end of the electron transport chain.

During glycolysis, most of the energy of glucose retained is in what form?

In the pyruvate.

Where does acetyl CoA accumulate during cellular respiration?

Mitochondrial matrix.

From three turns of the citric acid cycle starting with citrate, what products result?

3 ATP, 6 CO2, 9 NADH, and 3 FADH2.

Where does the oxygen for the synthesis of water during oxidative phosphorylation come from?

Molecular Oxygen (O2).

Which process produces the most ATP when glucose is completely oxidized?

Oxidative phosphorylation (chemiosmosis).

What happens to ubiquinone when NADH donates two electrons to it?

Ubiquinone is reduced.

What is the role of oxygen gas in our cells?

To accept electrons from the respiratory (electron transport) chain.

What initiates glucose metabolism in all cells?

Glycolysis.

Most carbon dioxide exhaled by animals comes from which cycle?

The citric acid cycle.

In the cell, where is oxygen utilized?

Mitochondrion.

The water that is a by-product of cellular respiration is produced by what process?

Reducing of oxygen at the end of the electron transport chain.

How is most ATP produced in our bodies?

Using ATP synthase.

Does fermentation require O2?

No, it does not require O2.

How do aerobic pathways of glucose metabolism compare with fermentation?

They produce more ATP.

What does cellular respiration use oxygen to convert?

The chemical energy stored in organic molecules into ATP.

What is the correct equation for cellular respiration?

6O2 + C6H12O6 ® 6CO2 + 6H2O + Energy.

What is the correct sequence of events in cellular respiration?

Glycolysis ® Krebs cycle (citric acid) ® electron transport.

The Krebs (citric acid) cycle starts with what?

Acetyl CoA and yields carbon dioxide.

Why is cellular respiration called an aerobic process?

Because it requires oxygen.

What process do microorganisms in milk use to produce acid in yogurt?

Lactic Acid Fermentation.

What molecules belong in box E and F in the context of cellular respiration?

CO2 and Oxygen.