What is cholesterol ? Name the two forms of cholesterol.

Explanation

### Step-by-Step Solution:

1. **Definition of Cholesterol**: Cholesterol is a type of fat (lipid) that is present in the blood. It is essential for various bodily functions, including the formation of cell membranes and the production of certain hormones.

2. **Source of Cholesterol**: The liver produces cholesterol, and it is also obtained from dietary sources such as meat, fish, eggs, milk, and butter.

3. **Role of Cholesterol**: Cholesterol serves as a precursor for the synthesis of steroid hormones, including estrogen, androgen, and glucocorticoids.

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