If the molecular mass of an amino acid is 150 daltoms, the molecular mass of a tripeptide will be

Options

A. 450
B. 486
C. 504
D. 414

Explanation

To find the molecular mass of a tripeptide formed from amino acids with a molecular mass of 150 Daltons, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Molecular Mass of One Amino Acid**:
The molecular mass of one amino acid is given as 150 Daltons.

2. **Calculate the Total Mass of Three Amino Acids**:
Since a tripeptide consists of three amino acids, we multiply the mass of one amino acid by three:
\[ \text{Total mass of three amino acids} = 3 \times 150 = 450 \text{ Daltons} \]

3. **Account for Water Molecules Released**:
When amino acids link together to form a peptide bond, a water molecule is released. For a tripeptide, two peptide bonds are formed, resulting in the release of two water molecules. The molecular mass of one water molecule (H₂O) is approximately 18 Daltons. Therefore, the total mass of the water released is:
\[ \text{Total mass of water released} = 2 \times 18 = 36 \text{ Daltons} \]

4. **Calculate the Molecular Mass of the Tripeptide**:
To find the molecular mass of the tripeptide, we subtract the mass of the water released from the total mass of the amino acids:
\[ \text{Molecular mass of tripeptide} = 450 - 36 = 414 \text{ Daltons} \]

### Final Answer:
The molecular mass of the tripeptide is **414 Daltons**.

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