Refer to the Table Below, Showing Data Collected from Experiments

question 12

Multiple Choice

Refer to the table below, showing data collected from experiments using purified soybean mitochondria incubated in buffer containing compound X, compound Y, or no additions.Three different assays were performed on each group of mitochondria to determine the rate of oxygen uptake, ATP synthesis, and formation of a hydrogen ion gradient.The results are expressed as a percentage relative to the control group. Which conclusion is consistent with these results?

• A) Compound X and compound Y inhibit different proteins in the respiratory chain.
• B) Compound X and compound Y both uncouple electron transport from ATP synthesis.
• C) Compound X uncouples electron transport from ATP synthesis, and compound Y inhibits a protein in the respiratory chain.
• D) Compound X inhibits a protein in the respiratory chain, and compound Y uncouples electron transport from ATP synthesis.
• E) Compound X prevents oxygen from functioning as the final electron acceptor, and compound Y inhibits a protein in the respiratory chain.

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Definitions:

Inorganic Substances

Chemical substances that do not contain carbon-hydrogen bonds, including minerals, water, and salts.

Glucose

Glucose is a simple sugar that is an important energy source in living organisms and is a component of many carbohydrates.

Cohesiveness

The quality of sticking together tightly; in a social context, it refers to the bonds that hold a group of people or components of a structure together.

Osmotic Equilibrium

A state where the concentration of solutes is equal across a semipermeable membrane, allowing equal movement of water in both directions.