(a(i))[1]
Identify the bond at X.
(a(ii))[2]
State the benefits to a mammal of a storage molecule that has many branches.
(a(iii))[2]
State two structural differences between cellulose and glycogen.
(b(i))[2]
Calculate the percentage of the energy in animal feed that becomes energy available for human consumption. Show your working.
(b(ii))[3]
Explain why humans obtain much less energy from animal products than from the same energy supplied directly by crop plants such as cereals.