Cellular respiration and ATP

≈ 48 min

Cellular respiration and ATP

Cellular respiration transfers chemical energy from glucose into ATP, a molecule cells can use for movement, active transport and synthesis. Aerobic respiration uses oxygen and produces carbon dioxide and water. Respiration occurs continuously in living cells, including plant cells. It is not the same as breathing: breathing moves gases at the organism level, while respiration releases usable energy in cells.

Work it through

When a muscle cell contracts, ATP supplies immediate energy. Aerobic respiration in mitochondria replaces ATP using glucose and oxygen. Carbon dioxide diffuses into blood and is later removed by the lungs.

Mastery target

Link glucose and oxygen to ATP production, then track where carbon dioxide leaves the body.

What is the immediate energy-carrying molecule used by cells?

ATP

DNA

Chlorophyll

Starch only

Name the key biological term from Cellular respiration and ATP: enter the term that best fits the explanation and visual model.

Why does breathing rate rise during vigorous exercise?

Cells need more oxygen for aerobic respiration and must remove more carbon dioxide.

Muscles begin photosynthesis.

ATP is stored in the lungs.

The heart makes glucose from oxygen.

Which statement corrects a common misunderstanding in Cellular respiration and ATP?

Correct: Plants photosynthesise when conditions allow, but they also respire day and night because all living cells need ATP.

A single observation is enough to prove every biological claim.

Scientific terms are interchangeable whenever they sound similar.

A process always has exactly the same result in every environment.