(a)[2]
Respiration liberates energy. State the word equation for aerobic respiration.
(b(i))[1]
Fig. 4.1 gives the mean daily energy requirement for different groups of males and females. State the average energy requirement of a five-year-old female.
(b(ii))[2]
An eleven-year-old male received only 8000 kJ per day for four months. Use the information in Fig. 4.1 to suggest two effects this could have on him.
(c)[3]
Use the information in Fig. 4.1 to make three comparisons between the energy needs of 17-year-olds and adults.
(d)[2]
Yeast cells are able to respire anaerobically. Biotechnology uses this. State two ways in which humans use the products of anaerobic respiration in yeast.