The difference between one amino acid and another is found on the

Options

A. Carboxyl Group
B. Amino group
C. R group
D. peptide bonds

Answer

To answer the question about the difference between one amino acid and another, we can follow these steps:

### Step 1: Understand the Structure of Amino Acids
Amino acids are the building blocks of proteins and have a common structure that includes:
- An alpha carbon (Cα)
- An amino group (NH2)
- A carboxylic group (COOH)
- A hydrogen atom (H)

### Step 2: Identify the Unique Component
While all amino acids share the same basic structure, the key difference between them lies in the side chain or R group. This R group varies among different amino acids and determines their unique properties.

### Step 3: Classify Amino Acids
The R group can influence the classification of amino acids into different categories such as:
- Polar amino acids
- Non-polar amino acids
- Hydrophobic amino acids

### Step 4: Conclusion
Thus, the difference between one amino acid and another is found in the R group.

### Final Answer
The difference between one amino acid and another is found on the **R group**.

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