Which of the Following Is Not True for the Nicotinamide

question 29

Multiple Choice

Which of the following is not true for the nicotinamide cofactors?

• A)The oxidized form is positively charged.
• B)The reduced form has a large extinction coefficient at 340 nm.
• C)The oxidized form provides reducing equivalents to other molecules.
• D)Oxidation-reduction reactions with nicotinamides usually involve hydride transfer.
• E)Enzymes transfer hydrides stereospecifically to one or the other side of the nicotinamide ring.

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Definitions:

Light-Independent Reactions

The series of biochemical reactions in photosynthesis that do not require light to proceed, occurring in the stroma of chloroplasts to synthesize glucose.

Photorespiration

Inefficient sugar-production pathway initiated when rubisco attaches oxygen instead of carbon dioxide to RuBP (ribulose bisphosphate).

Carbon Fixation

Process by which carbon from an inorganic source such as carbon dioxide is incorporated (fixed) into an organic molecule.

Calvin-Benson Cycle

A series of biochemical reactions taking place in the stroma of chloroplasts in photosynthetic organisms, pivotal in converting carbon dioxide into glucose.