Which of the Following Is True for All Exergonic Reactions

question 9

Multiple Choice

Which of the following is true for all exergonic reactions?

• A) The reaction goes only in a forward direction: All reactants will be converted to products, but no products will be converted to reactants.
• B) A net input of energy from the surroundings is required for the reactions to proceed.
• C) The reactions are rapid.
• D) The reaction proceeds with a net release of free energy.
• E) The products have more total energy than the reactants.

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Definitions:

Rubisco

An enzyme that catalyzes the first major step of carbon fixation in the process of photosynthesis.

Photorespiration

A metabolic pathway in plants that consumes oxygen, releases carbon dioxide, generates no ATP, and decreases photosynthetic output; it occurs when oxygen levels are high and carbon dioxide levels are low.

RuBP

Ribulose bisphosphate, a sugar involved in the initial step of carbon fixation in the process of photosynthesis.

Oxygen

A reactive, life-sustaining component of the atmosphere, essential for cellular respiration in aerobic organisms and critical for combustion processes.