In phenylketonuria, the amino acid (i) is not converted into (ii). Select the correct option to fill in the blanks (i) & (ii)

Options

A. (i) Ketone, (ii) Urea
B. (i) Phenylalanine, (ii) Urea
C. (i) Phenoxy acetic acid, (ii) Ketone
D. (i) Phenylalanine, (ii) Tyrosine

Answer

To solve the question regarding phenylketonuria, we need to identify the amino acid that is not converted into another due to a metabolic error.

### Step-by-Step Solution:

1. **Understanding Phenylketonuria**:
- Phenylketonuria (PKU) is a genetic disorder caused by a deficiency in the enzyme phenylalanine hydroxylase (PAH). This enzyme is responsible for converting phenylalanine into tyrosine.

2. **Identifying the Amino Acids**:
- The amino acid that is not converted is phenylalanine (i).
- The amino acid that it is supposed to be converted into is tyrosine (ii).

3. **Filling in the Blanks**:
- Therefore, the correct options to fill in the blanks are:
- (i) Phenylalanine
- (ii) Tyrosine

4. **Conclusion**:
- The answer to the question is: In phenylketonuria, the amino acid (i) is not converted into (ii), which means:
- (i) Phenylalanine
- (ii) Tyrosine

### Final Answer:
- (i) Phenylalanine
- (ii) Tyrosine