Question

Sugars are carbohydrates. The image below is a model of a sugar called glucose.

glucose molecule

Glucose can be found in foods like honey. What happens to glucose in the body?
A.
It goes through chemical reactions with carbon dioxide, which provides oxygen and energy for cells.
B.
It goes through chemical reactions with oxygen, which forms new molecules and provides energy for cells.
C.
It uses carbon dioxide in the cell's nucleus to produce a larger sugar molecule.
D.
It goes through a physical change in the cell's nucleus to produce oxygen.

Answer 1

B.

Glucose is broken down by cellular respiration: cells chemically react glucose with oxygen to make new molecules (mainly carbon dioxide and water) and release energy (stored as ATP) for the cell.

Why not the others:
- A reverses the true reactants/products (cells produce CO2, not use it).
- C and D describe uses of carbon dioxide or changes in the nucleus that don't match how glucose is metabolized.