Question

When a person comes out of a cinema hall after a noon show, he expriences a dazzling effect for a short period oftime. It happens due to degeneration of (P) ........... and regeneration of (Q) ........... pigments. Which of the following options is correct for P and Q?

Options

• P - Iodopsin, Q - Rhodopsin

• P - Rhodopsin, Q - Iodopsin

• P - Visual violet, Q - Visual purple

• P - Iodopsin, Q - Visual violet

Answer 1

P - Iodopsin, Q - Rhodopsin

Explanation: 

In bright light, the visual pigment iodopsin in cone cells is involved in vision and gets bleached. When a person suddenly enters a darker environment, rhodopsin in rod cells has to regenerate for proper vision in dim light. This temporary adjustment causes the dazzling effect.