Which of the following vegetarian meals will supply all essential amino acids in correct proportions for synthesiz-ing human proteins?

Options

A. Spinach and beans
B. Com and rice
C. Beans and rice
D. Peas and beans

Answer

To determine which vegetarian meal supplies all essential amino acids in the correct proportions for synthesizing human proteins, we need to understand the concept of essential amino acids and how they can be obtained from food sources.

### Step-by-Step Solution:

1. **Understanding Proteins and Amino Acids**:
- Proteins are made up of smaller units called amino acids. There are 20 different amino acids, out of which 9 are considered essential for humans. Essential amino acids cannot be synthesized by the body and must be obtained from the diet.

2. **Identifying Essential Amino Acids**:
- The essential amino acids include histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine. A complete protein source should provide all these amino acids in sufficient quantities.

3. **Sources of Essential Amino Acids in Vegetarian Diets**:
- Many plant-based foods do not contain all essential amino acids in the right proportions. However, certain combinations of plant foods can provide a complete amino acid profile.

4. **Combining Foods**:
- A well-known combination that provides all essential amino acids is beans and rice. Beans are rich in lysine but low in methionine, while rice is low in lysine but high in methionine. Together, they complement each other to provide a complete protein source.

5. **Conclusion**:
- Among the vegetarian meals listed, the combination of beans and rice is the one that supplies all essential amino acids in the correct proportions for synthesizing human proteins.

### Final Answer:
The vegetarian meal that will supply all essential amino acids in correct proportions for synthesizing human proteins is **beans and rice**.

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