🧪 Galactosemia – Enzyme Deficiency

Let’s understand this in a very simple way.

What is Galactosemia?
It is a genetic disorder where the body cannot properly break down galactose (a sugar found in milk).

Because of this, harmful substances build up in the body.

Which enzyme is deficient?
In exams, galactosemia can be due to deficiency of different enzymes involved in galactose metabolism.

✅ Correct Answer: (d) All of the above

Why all are correct?
Galactose metabolism involves multiple enzymes, and deficiency of any of these can cause galactosemia:

• Galactose-1-phosphate uridyl transferase (GALT) → Most common and severe type
• Galactokinase → Causes milder form
• Epimerase → Rare type

So, all these enzyme deficiencies are forms of galactosemia.

Easy way to remember:
Galactose metabolism = 3 main enzymes
If any one is missing → Galactosemia

Simple Exam Trick:
Galactosemia → Think multiple enzyme defects → All of the above

📌 Note: The most important and commonly tested enzyme is GALT (Galactose-1-phosphate uridyl transferase).

💚 Exam Objective Nursing – Asha D
Concept clarity • Easy recall • Nursing success