Which of the following sugars in semen is a source of energy for the spermatoza?

Options

A. sucrose
B. fructose
C. glucose
D. galactose

Answer

To solve the question, "Which of the following sugars in semen is a source of energy for the spermatozoa?", we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Sugars Listed**: The question provides four options: sucrose, fructose, glucose, and galactose.

2. **Understand the Role of Seminal Vesicles**: The seminal vesicles are glands that produce a significant portion of the fluid that makes up semen. This fluid is crucial for the nourishment and motility of sperm.

3. **Determine the Sugar Secreted by Seminal Vesicles**: Among the sugars listed, it is known that the seminal vesicles primarily secrete fructose. This sugar is specifically utilized by spermatozoa for energy.

4. **Function of Fructose in Semen**: Fructose serves as an energy source for sperm motility. It is essential for the movement and viability of sperm cells.

5. **Conclusion**: Based on the information about the sugars and their functions in semen, the correct answer is fructose, as it is the sugar that provides energy for spermatozoa.

### Final Answer:
The sugar in semen that serves as a source of energy for spermatozoa is **fructose**.

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