Fig. 6.1 shows a diagram of part of a mitochondrion in section. The four arrows, A, B, C and D, indicate how molecules and ions move.
(a(i))[1]
Use the letters to identify every arrow (one or more) that shows active transport of protons.
(a(ii))[1]
Use the letters to identify every arrow (one or more) that shows diffusion of carbon dioxide.
(b)[3]
Outline the role of the mitochondrial matrix in respiration.
(c)[4]
Explain how a lack of oxygen affects oxidative phosphorylation.
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