Refer to the Table Below

question 91

Multiple Choice

Refer to the table below. Data in the table summarize a set of experiments in which a plant species was treated with plain water or with additions of compound X or compound Y to its daily waterings.After 7 days of treatment, chloroplasts from the plants were isolated, and their abilities to carry out water oxidation, ATP production, and NADP⁺ reduction were measured.The number of "+" symbols is proportional to the level of biological activity observed.Both cyclic and noncyclic photophosphorylation processes are active in this plant species.Which hypothesis concerning the mode of action of compounds X and Y is consistent with the data?

• A) Compound X and compound Y are both inhibitors of ATP synthase.
• B) Compound X and compound Y are both inhibitors of NADP⁺ reductase.
• C) Compound X is an NADP⁺ reductase inhibitor, and compound Y causes protons to leak through the thylakoid membrane.
• D) Compound X causes protons to leak through the thylakoid membrane, and compound Y is an ATP synthase inhibitor.
• E) Compound X is an ATP synthase inhibitor, and compound Y causes protons to leak through the thylakoid membrane.

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Definitions:

Budget Variance

The variance between what was expected to be spent or earned, according to the budget, and the real amount that was spent or received.

Predetermined Overhead Rate

A rate used to allocate manufacturing overhead to individual products or job orders, based on a specific activity base, such as labor hours or machine hours.

Fixed Component

The portion of total costs that remains unchanged regardless of the level of production or business activity.

Variable Overhead Rate

The cost of indirect manufacturing expenses that fluctuate with production volume, calculated per unit of activity or base.