Chapter 9 Online

_________donates electrons to the electron transport chain.

_________ is the final electron acceptor of the electron transport chain.

_______ is a prosthetic group present in several components of the electron transport chain.

_________ is a nonprotein organic electron carrier within the electron transport chain.

________ is a multi-protein complex within the electron transport chain.

Of the following lists of electron transport compounds, which one lists them in order from the one containing electrons with the highest free energy to the one containing electrons with the lowest free energy? Note that not all electron transport compounds in the electron transport chain are listed. a) FMN of Complex I -- Q -- Fe-S of Complex II -- FADH2 -- Fe-S of Complex III -- Cyt c -- Cyt a of Complex IV -- O2 b) FADH2 -- FMN of Complex I -- Fe-S of Complex II -- Q -- Fe-S of Complex III -- Cyt c -- Cyt a of Complex IV -- O2 c) O2 -- Cyt a of Complex IV -- Cyt c -- Fe-S of Complex III -- Q -- Fe-S of Complex II -- FMN of Complex I -- FADH2 d) FADH2 -- FMN of Complex I -- Fe-S of Complex II -- Fe-S of Complex III -- Q -- Cyt a of Complex IV -- Cyt c -- O2

Approximately how much more free energy is supplied to the electron transport chain by NADH than by FADH2?

What is the correct order of electron transport compounds from least electronegative to most electronegative? a) NADH -- Fe-S of Complex I -- Q -- Fe-S of Complex III -- Cyt c-- Cyt a of Complex IV -- O2 b) O2 -- Fe-S of Complex I -- NADH -- Q -- Fe-S of Complex III -- Cyt c-- Cyt a of Complex IV c) O2 -- Cyt a of Complex IV -- Cyt c -- Fe-S of Complex III -- Q -- Fe-S of Complex I -- NADH d) NADH -- Cyt c -- Fe-S of Complex I -- Q -- Fe-S of Complex III -- Cyt a of Complex IV-- O2

If a mitochondrion ran out of molecular oxygen (O2), predict which of the following situations would occur in its electron transport chain. a) FADH2 would be the main electron donor to the electron transport chain instead of NADH. b) Electrons would start to flow in the opposite direction, converting water into O2 and H+. c) H2O would be made instead of O2 at the end of the chain. d) Cyt a 3 prosthetic groups would remain oxidized and Cyt a would have nowhere to donate electrons. e) FMN prosthetic groups would remain reduced and NADH would have nowhere to donate electrons.

Glycolysis

The citric acid cycle

Oxygen

Which of the following best describes the main purpose of the combined processes of glycolysis and cellular respiration?

In which reactions of cellular respiration and fermentation does substrate-level phosphorylation occur?

Which of the summary statements below describes the results of the following reaction? C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + Energy

How many NADH are produced by glycolysis?

In glycolysis, ATP molecules are produced by _____.

Which of these is NOT a product of glycolysis?

In glycolysis, what starts the process of glucose oxidation?

In glycolysis there is a net gain of _____ ATP.

In glycolysis, for each molecule of glucose oxidized to pyruvate, ________.

Carbon dioxide (CO2) is released during which of the following stages of cellular respiration?

Which of the following events takes place in the electron transport chain?

Which of the following processes generates a proton-motive force in mitochondria?

Energy released by the electron transport chain is used to pump H+ ions into which location in eukaryotic cells?

In the absence of oxygen, what is the net gain of ATP for each glucose molecule that enters glycolysis?

The immediate energy source that drives ATP synthesis by ATP synthase during oxidative phosphorylation is the

Which metabolic pathway is common to both fermentation and cellular respiration of a glucose molecule?