Mark the most basic site in the molecule below with an asterisk. 
Definitions:
Cones
Photoreceptor cells in the retina of the eye that function in bright light and enable the perception of color and fine detail.
Excitation
A process that increases the likelihood or strength of a response in neural or physiological systems.
Dark Adaptation
The process by which the eyes increase their sensitivity to low levels of light.
Rods
Photoreceptor cells in the retina of the eye that function in low light conditions and are responsible for night vision.
Q21: Which of the following compounds is hydrolyzed
Q22: Provide a detailed, stepwise mechanism for the
Q24: List the following carbonyl compounds in order
Q40: A deficiency of _ results in megoblastic
Q43: Draw the dipeptide Val-Tyr at pH 7.0.
Q46: Typically, amides will hydrolyze under _ conditions
Q47: An optically active D-aldopentose produced an optically
Q72: What is the major product of the
Q75: Provide the major organic product of the
Q122: Give a detailed, stepwise mechanism for the