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: Understanding the Question.
The question asks which sugar the body can use right away to get energy, without needing to break it down further first.

Step 2: Key Concept.
Cells burn glucose directly inside their mitochondria to release energy. Since glucose is already a simple sugar, the body absorbs it into the blood fast and cells can use it at once, making it the quickest source of usable energy.

Step 3: Checking each option.
(A) Lactose: Lactose is a double sugar found in milk. It must first be broken down by the enzyme lactase into glucose and galactose before the body can use it, so it is not an immediate energy source.
(B) Cellulose: Cellulose is a plant fiber that the human body cannot digest at all, it passes through as roughage and gives no usable energy.
(C) Maltose: Maltose is also a double sugar, made of two glucose units joined together. It needs to be split by the enzyme maltase before the body can absorb and use it.
(D) Glucose: Glucose is already a single simple sugar. It enters the bloodstream quickly and is used by cells right away, making it the immediate source of energy.

Step 4: Final Answer.
Glucose is the sugar that provides immediate energy.