Rod photoreceptor cells are responsible for vision in dim li…
Rod photoreceptor cells are responsible for vision in dim light. The figure shows the pathway through which a rod photoreceptor cell senses light. Predict whether the following mutations will result in a) night blindness (poor or no eye-sight in dim light) b) prolonged response to a short light flash. Hint: Blocking the activation pathway will result in night blindness, whereas, blocking the inactivation pathway will result in prolonged response to a short light flash. Rhodopsin is inactive Rhodopsin kinase is inactive The guanylyl cyclase is inactive The cGMP phosphodiesterase is inactive The Regulator of G-protein signaling protein is inactive