Photosensitive compound in human eye is made up of:

Options

A. Opsin and Retinal
B. Opsin and retinol
C. Transducin and retinene
D. Guanosine and Retinol

Answer

To answer the question "Photosensitive compound in human eye is made up of:", we can follow these steps:

### Step 1: Identify the Photosensitive Compound
The primary photosensitive compound in the human eye is known as **rhodopsin**. Rhodopsin is crucial for vision, especially in low-light conditions.

**Hint:** Remember that rhodopsin is often referred to as "visual purple" due to its color.

### Step 2: Understand the Composition of Rhodopsin
Rhodopsin is composed of two main components:
1. **Opsin** - This is a large protein.
2. **Retinal** - This is a derivative of vitamin A, specifically known as retinol.

**Hint:** Think of retinal as the light-absorbing part of the compound that interacts with light.

### Step 3: Function of Rhodopsin
Rhodopsin plays a significant role in the phototransduction process, where it helps convert light into electrical signals that can be interpreted by the brain. This process occurs in the photoreceptor cells of the retina.

**Hint:** Consider how the eye processes light and how rhodopsin is essential for this conversion.

### Step 4: Conclusion
Thus, the photosensitive compound in the human eye, rhodopsin, is made up of a protein (opsin) and a light-sensitive molecule (retinal).

**Final Answer:** The photosensitive compound in the human eye is made up of **opsin and retinal**.

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