Amino acids absent in pulses are

Options

A. methionine and alanine
B. alanine and cysteine
C. methionine and cysteine
D. Lysine and tryptophan

Answer

### Step-by-Step Solution:

1. **Understanding Amino Acids**:
- Amino acids are the building blocks of proteins. They play a crucial role in various biological processes, including the synthesis of proteins.

2. **Identifying Amino Acids**:
- There are 20 standard amino acids, and they can be categorized into essential and non-essential amino acids. Essential amino acids must be obtained from the diet.

3. **Focus on Pulses**:
- Pulses are a significant source of protein in many diets, especially in vegetarian and vegan diets. However, they may lack certain essential amino acids.

4. **List of Amino Acids**:
- The amino acids mentioned in the video transcript include methionine, alanine, cysteine, lysine, and tryptophan.

5. **Analyzing the Amino Acids**:
- **Methionine**: An essential sulfur-containing amino acid important for protein synthesis.
- **Alanine**: A non-essential amino acid that plays a role in protein metabolism.
- **Cysteine**: A non-essential amino acid that can be synthesized from methionine.
- **Lysine**: An essential amino acid crucial for protein synthesis and growth.
- **Tryptophan**: An essential amino acid important for growth and development, especially in infants.

6. **Conclusion**:
- Among the amino acids listed, **methionine** and **tryptophan** are commonly known to be deficient in pulses. Thus, the amino acids that are absent in pulses are **methionine** and **tryptophan**.

### Final Answer:
The amino acids absent in pulses are **methionine** and **tryptophan**.

---