How Is the Active Retinal State Returned to the Inactive

question 39

Multiple Choice

How is the active retinal state returned to the inactive state?

• A)It reverts back to the inactive state on its own.
• B)It is converted back to the inactive confirmation without use of enzymes.
• C)It is transported to a lysosome.
• D)It is converted back to the inactive confirmation by a series of enzymes.

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Definitions:

β-Carotene

A red-orange pigment found in plants and fruits, and a critical precursor of vitamin A in the human diet.

Isoprene

A common organic compound with the formula C5H8, used as a monomer in the production of natural and synthetic rubbers.

Steroids

A class of lipophilic compounds characterized by a core structure of four fused carbon rings, varying by the functional groups attached and serving in various biological roles.

Sesquiterpene

A class of terpenes that consist of three isoprene units and have the molecular formula C15H24.