Outline the characteristic features of organisms in the domain Bacteria.

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2018). The mark or mark type is shown in brackets.

1. [8] any eight from 1 no, nucleus / nuclear envelope; 2 circular DNA ; 3 histone-like / HU / HN-S / INF, proteins associated with DNA ; 4 no membrane-bound organelles ; 5 named example of absent organelle; 6 70S/18nm, ribosomes ; 7 cell wall made of, peptidoglycan / murein ; 8 binary fission; 9 unicellular ; 10 spherical/rod / spiral / comma / corkscrew, shape or may form, pairs / tetrads / strings / filaments / clusters / palisades; 11 size detail; 12 Gram-negative have, extra / second / outer, membrane; 13 AVP; (other structural feature) 14 AVP; (other non-structural feature)
2. [7] any seven from 1 collect/take, plants / seeds, from the wild ; 2 (from) many countries / international effort ; 3 (especially from) areas at risk from climate change; 4 grow/cultivate / plant, seeds / plants (in botanic gardens); 5 increase, plant / seed, number ; 6 tissue culture / cloning; 7 (store in) seed bank ; 8 maintain / measure, genetic diversity or ref. to gene bank ; 9 cooperate with, governments / charities / agencies / universities ; 10 for research ; 11 to conserve habitats ; 12 to restore habitats; 13 to reintroduce species (to wild) ; 14 educate (public) / raise awareness ; 15 raise funds ; 16 AVP; e.g. prepare suitable habitats / growing conditions