Which of the following statements is false?

Options

A. In solutions of different pH, the structure of amino acid changes
B. Protein is a homopolymer
C. Non-essential amino acids are synthesised by animals
D. Dietary proteins are source of essential amino acids

Answer

To determine which of the statements is false, we will analyze each statement one by one:

1. **Statement 1**: "In solutions of different pH, the structure of amino acid changes."
- **Analysis**: This statement is true. The structure of amino acids can change with pH due to the ionizable nature of their amino and carboxyl groups. At different pH levels, these groups can either gain or lose protons, leading to changes in the overall charge and structure of the amino acid.

2. **Statement 2**: "Protein is a homopolymer."
- **Analysis**: This statement is false. Proteins are not homopolymers; they are heteropolymers because they are composed of different types of amino acids. Homopolymers are made of only one type of monomer, whereas proteins consist of various amino acids linked together.

3. **Statement 3**: "Non-essential amino acids are synthesized by animals."
- **Analysis**: This statement is true. Non-essential amino acids can be synthesized by the body, meaning animals can produce them internally without needing to obtain them from the diet.

4. **Statement 4**: "Dietary proteins are essential amino acids."
- **Analysis**: This statement is true. Essential amino acids cannot be synthesized by the body and must be obtained through dietary sources.

**Conclusion**: The false statement among the options is **Statement 2**: "Protein is a homopolymer."

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