Proteins are polyamides of

Options

A. `beta`-amino acids
B. `alpha`-amino acids
C. `alpha`-hydroxy acids
D. `beta`-keto acids

Answer

To solve the question "Proteins are polyamides of," we need to identify the correct type of amino acid that forms proteins. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Composition of Proteins
Proteins are large biomolecules that are essential for various biological functions. They are made up of smaller units called amino acids.

**Hint:** Remember that proteins are polymers made from monomers known as amino acids.

### Step 2: Identify the Types of Amino Acids
Amino acids can be classified into different categories based on their structure. The main types mentioned in the options are:
- Alpha amino acids
- Beta amino acids
- Alpha hydroxy acids
- Beta keto acids

**Hint:** Focus on the structure of amino acids, particularly the position of the amino group (-NH2) relative to the carboxyl group (-COOH).

### Step 3: Determine the Correct Type of Amino Acid for Proteins
The amino acids that are primarily involved in the formation of proteins are known as alpha amino acids. These amino acids have the amino group attached to the carbon atom that is adjacent to the carboxyl group (the alpha carbon).

**Hint:** Recall that the "alpha" designation indicates the position of the amino group in relation to the carboxyl group.

### Step 4: Conclusion
Since proteins are formed by the polymerization of alpha amino acids through peptide bonds, the correct answer to the question is:

**Proteins are polyamides of alpha amino acids.**

### Final Answer:
**The correct option is: Alpha amino acids (Option 2).**

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