Multiple choice

The photosensitive parts of rod cells are made up of

  1. rhodopsin

  2. myelin

  3. keratin

  4. actin

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Rod cells contain rhodopsin, a photosensitive pigment that enables vision in low-light conditions. Myelin is a nerve insulation material, keratin is a structural protein in skin/hair/nails, and actin is a muscle contraction protein - none are photosensitive.