Gas Exchange in Plants Quiz

Which plant organ is responsible for gas exchange?

• Flowers

• Stem

• Leaves

• Roots

When do plants respire? When do plants photosynthesise?

• Plants respire during the day and night, and photosynthesise at night

• Plants respire during the day and night, and photosynthesise during the day

• Plants respire during the day, and photosynthesise at night

• Plants respire at night, and photosynthesise during the day

What is the equation (word/chemical) for aerobic respiration?

• CO2 + H2O + light energy → C6H12O6 + O2

• C6H12O6 + O2 → CO2 + H2O + ATP

• C6H12O6 + O2 → CO2 + H2O + light energy

• CO2 + H2O → C6H12O6 + O2 + ATP

What is the equation (word/chemical) for photosynthesis?

• CO2 + H2O + light energy → C6H12O6 + O2

• C6H12O6 + O2 → CO2 + H2O + ATP

• CO2 + H2O → C6H12O6 + O2 + ATP

• C6H12O6 + O2 → CO2 + H2O + light energy

What is the main gas released during the day due to photosynthesis?

• Hydrogen

• Nitrogen

• Oxygen

• Carbon Dioxide

What is the main gas released at night due to respiration?

• Nitrogen

• Oxygen

• Hydrogen

• Carbon Dioxide

Which leaf component is responsible for gas exchange?

• Cuticle

• Palisade mesophyll

• Spongy mesophyll

• Vascular bundle

What is the function of stomata in leaves?

• To transport nutrients

• To exchange gases

• To trap sunlight

• To store water

What causes stomata to open during the day?

• Decreased light intensity

• Increased light intensity

• Decreased temperature

• Increased temperature

What is the role of guard cells in regulating stomatal opening?

• To store starch in guard cells

• To actively transport K+ into guard cells to open stomata

• To produce ATP

• To reduce water loss