Which Statement Is TRUE Regarding the Regulation of Nitrogen Fixation

question 55

Multiple Choice

Which statement is TRUE regarding the regulation of nitrogen fixation?

• A) High concentrations of ADP will activate nitrogen fixation enzymes.
• B) Elevated concentrations of ammonia will reduce expression of genes associated with nitrogen fixation.
• C) ATP acts as a negative allosteric effector for nitrogenase.
• D) Nitrogenase is regulated via adenylylation.
• E) Oxygen acts as an allosteric effector for the nitrogenase complex.

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Definitions:

Allocative Efficiency

A state of the economy in which production represents consumer preferences; every good or service is produced up to the point where the last unit provides a marginal benefit equal to its marginal cost of production.

Productive Efficiency

A situation in which an economy or entity can no longer produce additional amounts of a good without lowering the production level of another product.

Substitute Goods

Products or services that can be used in place of each other, having a positive cross-elasticity of demand.

Productive Efficiency

A situation in which a good or service is produced at the lowest possible cost.