Question

Which of the following sugars provides immediate energy?

• A. Lactose
• B. Cellulose
• C. Maltose
• D. Glucose

Hint:

Think about which sugar is already simple enough that the body does not need to break it down before using it.

Answer 1

The Correct Option is D

Step 1: Split sugars into two groups.
Sugars come in two forms, simple sugars that the body can use straight away, and double or complex sugars that must be broken apart first by digestive enzymes before they become usable.

Step 2: Sort the given options into these groups.
Lactose and maltose are both double sugars, they need enzymes such as lactase and maltase to split them into simple sugars before the body can use them. Cellulose is a complex plant fiber that human digestive enzymes cannot break down at all.

Step 3: Focus on the simple sugar.
Glucose stands apart because it is already in its simplest form. Once absorbed into the blood, it needs no further breakdown, so cells can burn it for energy right away. This is why doctors sometimes give glucose directly to a tired or weak patient for quick relief.

Step 4: Conclude.
Because it skips the need for digestion, glucose is the sugar that gives the body immediate energy.
The correct answer is Glucose.