B12 Respiration IGCSE Combined Science

The process of breaking down of food in the cell with release of energy is called

• Digestion

• Cellular respiration

• Circulation

• Excretion

Aerobic respiration.....

• doesn't require CO2
• requires CO2
• doesn't require oxygen
• requires oxygen

When you breathe, your lungs take in ___ and remove ___. 

• air/oxygen
• oxygen/carbon dioxide 
• carbon dioxide/waste 
• waste/air 

When breakdown of glucose occurs with the use of oxygen it is called

• aerobic respiration

• anaerobic respiration

• cellular respiration

• anaerobes

During heavy exercise when supply of oxygen to our muscles is insufficient food breakdown is by

• anaerobic respiration

• aerobic respiration

• cellular respiration

Where in the body does respiration take place? Select the best answer.

• The lungs

• The muscles

• All cells

• The blood

What is the word equation for aerobic respiration in plants?

• carbon dioxide + water → glucose + oxygen

• glucose + carbon dioxide → water + oxygen

• glucose + oxygen → carbon dioxide + water

• glucose + water → carbon dioxide + oxygen

Which process releases the most energy from one molecule of glucose?

• aerobic respiration

• anaerobic respiration in muscle

• aerobic respiration in yeast

• photosynthesis

In which conditions do the leaves of a green plant respire?

• bright only

• dark only

• bright and dark

Which chemical could be used to show that cells are respiring aerobically?

• Benedict’s solution

• B dilute sulfuric acid

• ethanol

• limewater