Name the base at label X.
Name the sugar at label Y.
State three reasons why ATP serves as an energy currency in all living organisms.
ATP is generated in three stages of aerobic respiration. Complete the table to show two products of each stage, apart from ATP, for: • glycolysis • Krebs cycle • oxidative phosphorylation.
Carbohydrates and lipids can both act as respiratory substrates. Table 7.1 gives the energy values of carbohydrates and lipids in $\text{kJ g}^{-1}$. Explain why lipids have a greater energy value than carbohydrates.
State how the respiratory quotient (RQ) is worked out.
Give the usual RQ values that arise from carbohydrate respiration and lipid respiration. carbohydrate .................... lipid ....................
Suggest how the RQ value changes when respiration in yeast becomes anaerobic.