The number of molecules of pyruvic acid formed from one molecule of glucose at the end of glycolysis is

Options

A. 4
B. 3
C. 1
D. 2

Explanation

To solve the question regarding the number of molecules of pyruvic acid formed from one molecule of glucose at the end of glycolysis, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Glycolysis**: Glycolysis is the metabolic pathway that converts glucose (a six-carbon molecule) into pyruvate (a three-carbon molecule). This process occurs in the cytoplasm of the cell.

2. **Starting Material**: One molecule of glucose (C6H12O6) is the starting material for glycolysis.

3. **Conversion Process**: During glycolysis, glucose is broken down through a series of enzymatic reactions. The pathway consists of two main phases: the preparatory phase and the payoff phase.

4. **End Product**: At the end of glycolysis, each molecule of glucose is converted into two molecules of pyruvic acid (C3H4O3).

5. **Counting Pyruvic Acid Molecules**: Since one molecule of glucose yields two molecules of pyruvic acid, we conclude that the answer to the question is 2.

### Final Answer:
The number of molecules of pyruvic acid formed from one molecule of glucose at the end of glycolysis is **2**.