Step 1: Understanding the Concept:
Lactose synthesis involves specific enzymes.
Alpha lactalbumin modifies one of these enzymes.
Step 2: Key Formula or Approach:
No specific formula.
Need to know the biosynthesis of lactose.
Step 3: Detailed Explanation:
Alpha lactalbumin acts as a modifier for galactosyl transferase.
It changes the specificity of the enzyme.
This allows the synthesis of lactose.
Hexokinase, epimerase, and phosphoglucomutase are not modified.
Thus, galactosyl transferase is the correct enzyme.
Step 4: Final Answer:
Alpha lactalbumin modifies galactosyl transferase.
Hence, the correct option is (B).
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