(a(i))[1]
NAD and FAD coenzymes pass hydrogen atoms to the electron transport chain (ETC). Using Fig. 1.1, state which one of the four carriers accepts hydrogen atoms from reduced FAD.
(a(ii))[2]
Hydrogen atoms supplied to the ETC by reduced NAD and reduced FAD are split into protons and electrons. Energy is released while electrons move along the ETC. Describe the events that follow from this release of energy.
(a(iii))[3]
Describe the role of structure 5 in Fig. 1.1 in oxidative phosphorylation.
(b)[4]
Cyanide ions ($\text{CN}^-$) are extremely toxic. They bind to carrier 4 in Fig. 1.1 and render the carrier inactive. Suggest and explain how the attachment of cyanide ions to carrier 4 can affect respiration.