(a)[2]
State two cell structures that are found in both animal and bacterial cells.
(b)[3]
State a reason that makes bacteria useful in biotechnology.
(c(i))[1]
On Fig. 5.1, place an X to indicate the lag phase.
(c(ii))[1]
On Fig. 5.1, add a Y to show the point where the birth rate equals the death rate.
(c(iii))[1]
Calculate how long it takes for the number of bacteria to halve after the bacteria have been in the fermenter for 24 hours.
(c(iv))[3]
Describe and explain the change in bacterial population size from 24 hours to 50 hours shown in Fig. 5.1.
(c(v))[3]
Explain why maintaining this matters for enzyme function.
(c(vi))[1]
State why the bacteria are grown in a liquid that contains amino acids.