IGCSE Biology 2.37 Digestive enzymes Topic Practice

A respirometer is a simple apparatus that can be used to measure the rate of respiration in small organisms.

A student uses the respirometer to investigate the rate of respiration in some germinating seeds.

Give the balanced chemical symbol equation for aerobic respiration.

Aerobic respiration is a process in living organisms.

Which of these is the balanced chemical symbol equation for aerobic respiration?
□ $A \mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}+6 \mathrm{O}_{2} \longrightarrow 6 \mathrm{CO}_{2}$
□ $B \mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6} \longrightarrow 2 \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}+2 \mathrm{CO}_{2}$
□ C $\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}+6 \mathrm{CO}_{2} \longrightarrow 6 \mathrm{O}_{2}+6 \mathrm{H}_{2} \mathrm{O}$
□ D $\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}+6 \mathrm{O}_{2} \longrightarrow 6 \mathrm{CO}_{2}+6 \mathrm{H}_{2} \mathrm{O}$

Aerobic respiration uses oxygen and produces ATP.

Complete the word equation for aerobic respiration.
oxygen + ⟶ + + ATP

The table gives some information about enzymes in the human digestive system. Complete the table by giving the missing information.