Sulphur is needed for

Options

A. glucose formation
B. ATP synthesis
C. DNA duplication
D. protein synthesis

Answer

### Step-by-Step Solution:

1. **Understanding the Role of Sulfur**: Sulfur is an essential element that plays a significant role in biological processes, particularly in the formation of proteins.

2. **Sulfur in Amino Acids**: It is important to note that sulfur is a component of certain amino acids. The amino acids that contain sulfur include methionine, cysteine, homocysteine, and taurine.

3. **Incorporation into Proteins**: Among these amino acids, methionine and cysteine are the ones that are incorporated into proteins. This means they are directly involved in the formation of protein structures.

4. **Disulfide Bonds**: Sulfur contributes to the formation of disulfide bonds (S-S bonds) between cysteine residues in proteins. These bonds are crucial for maintaining the three-dimensional structure of proteins, which is essential for their function.

5. **Conclusion**: Given the options provided, the correct answer is that sulfur is needed for protein synthesis, as it is a part of the structure of certain amino acids that make up proteins.

### Final Answer:
**Sulfur is needed for protein synthesis.**

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