What reaction has to occur each time light reaches the eye before the product of this reaction can be recombined with opsin to reform rhodopsin?
a. Cis-retinal must be reconverted to trans-retinal
b. Trans-retinal must be reconverted to cis-retinal
c. ?-carotene must be reconverted to preformed vitamin A
d. Preformed vitamin A must be reconverted to ?-carotene
b
You might also like to view...
The phosphate group on a phospholipid:
a. enables phospholipids to dissolve in water. b. makes the phospholipid saturated. c. prevents the digestion of lecithin supplements. d. competes with fatty acids.
Explain how the hot and cold system of health and diet is practiced by Puerto Ricans. How might this affect pregnancy outcomes?
The primary function of vitamin D in the body is to:
a. prevent anemia. b. regulate calcium and phosphorus levels. c. modulate iron levels. d. support night vision.
Formative evaluation is the process of testing and assessing certain elements of a program before it is implemented fully
a. True b. False Indicate whether the statement is true or false