The Key Reaction of Eyesight (In Dim Light) Involving Vitamin

question 16

Multiple Choice

The key reaction of eyesight (in dim light) involving vitamin A is:

• A) Reaction of the protein complex called Rhodopsin.
• B) A cis-trans isomerization of a double bond.
• C) Bleaching of a pigment in the retina.
• D) Reaction of Rhodopsin and cis-trans isomerization of a double bond.
• E) All of these.