STATEMENT-1 : Glycine is an achiral amino acid.
STATEMENT-2 : pH of alanine is less than 7
STATEMENT-3: Almost all proteins are polypeptides

Options

A. TTT
B. FFF
C. TFT
D. FTF

Answer

To analyze the statements provided in the question, we will evaluate each statement one by one.

### Step 1: Evaluate Statement 1
**Statement 1**: Glycine is an achiral amino acid.

- Glycine has the structure NH2-CH2-COOH.
- The central carbon atom in glycine is attached to two hydrogen atoms and one amino group (NH2) and one carboxyl group (COOH).
- A chiral carbon is defined as a carbon atom that is attached to four different groups. Since the central carbon in glycine is attached to two hydrogen atoms, it does not meet this criterion.
- Therefore, glycine is indeed an achiral amino acid.

**Conclusion**: Statement 1 is **True**.

### Step 2: Evaluate Statement 2
**Statement 2**: The pH of alanine is less than 7.

- Alanine is an amino acid with the structure NH2-CH(CH3)-COOH.
- The pH of amino acids can vary, but for alanine, it is known to be around 6.11 in its zwitterionic form.
- Since 6.11 is less than 7, this indicates that alanine is slightly acidic.

**Conclusion**: Statement 2 is **True**.

### Step 3: Evaluate Statement 3
**Statement 3**: Almost all proteins are polypeptides.

- Proteins are indeed composed of long chains of amino acids linked by peptide bonds, which are formed through condensation reactions between the amino group of one amino acid and the carboxyl group of another.
- Therefore, it is accurate to say that almost all proteins are polypeptides.

**Conclusion**: Statement 3 is **True**.

### Final Conclusion
Since all three statements are true, the correct answer is:
**Option A: True, True, True.**

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