Which process provides humans with the glucose needed for cellular respiration?

Question

A
digestion

B
fermentation

C
photosynthesis

D
breathing

Answer 1

The correct answer is A. digestion.

Digestion is the process by which food is broken down into smaller molecules, including glucose, which is then absorbed into the bloodstream and used by cells for cellular respiration.

• Fermentation (B) is an anaerobic process that converts sugars to acids, gases, or alcohol but does not directly provide glucose.
• Photosynthesis (C) is the process by which plants convert light energy into chemical energy in the form of glucose, but it does not provide glucose to humans directly.
• Breathing (D) involves the exchange of gases (oxygen and carbon dioxide) and is not responsible for providing glucose.

So, digestion is the correct choice as it allows us to obtain glucose from the food we eat.