3. Energy & Cell Processes

What is the function of ATP synthase in the electron transport chain?

The poison cyanide binds to an electron carrier within the electron transport chain and blocks the movement of electrons. When this happens, glycolysis and the citric acid cycle soon grind to a halt as well. Why do you think these other two stages of cellular respiration stop? (Explain your answer.)a. They run out of ATP.b. Unused O2 interferes with cellular respiration.c. They run out of NAD+ and FAD.d. Electrons are no longer available.

The structural components of the electron transport chain include which of the following?

Which process takes place in the inner membrane of mitochondria?

Where does oxidative phosphorylation occur during cellular respiration?

Cyanide (C≡N−) blocks complex IV of the electron transport chain. Suggest a hypothesis for what happens to the ETC when complex IV stops working. Your hypothesis should explain why cyanide poisoning in humans is fatal.

The researchers who observed that magnetite was produced by bacterial cultures from the deep subsurface carried out a follow-up experiment. These biologists treated some of the cultures with a drug that poisons the enzymes involved in electron transport chains. In cultures where the drug was present, no more magnetite was produced. Does this result support or undermine their hypothesis that the bacteria in the cultures perform cellular respiration? Explain your reasoning.

The electron transport chain .a. is located in the matrix of the mitochondrion;b. has the electronegative carbon dioxide at its base;c. is a series of nucleotides located in the inner mitochondrial membrane;d. is a series of enzymes located in the intermembrane space;e. moves electrons from protein to protein and moves protons from the matrix into the intermembrane space

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

Why must the electron transport chain proteins and molecules be embedded in a membrane?

Each membrane protein complex in the electron transport chain functions as which of the following?

What is the final (terminal) electron acceptor in the mitochondrial electron transport chain?

Which of the following allows for ATP to be produced during the electron transport chain?

In mitochondria, exergonic redox reactionsa. are the source of energy driving prokaryotic ATP synthesis.b. provide the energy that establishes the proton gradient.c. reduce carbon atoms to carbon dioxide.d. are coupled via phosphorylated intermediates to endergonic processes