Download 2.3 Example Mark Schemes A. Mitochondria: produce ATP/site of

2.3 Example Mark Schemes
2.3.2
A. Mitochondria: produce ATP/site of (aerobic) respiration
B. Nucleus: contains genetic information/produces RNA/storage and protection of chromosomes/replication
of DNA
C. Rough Endoplasmic reticulum: translation/protein production/protein transport
D. Ribosomes: translation/produces polypeptides/protein synthesis
E. Golgi Apparatus: produces glycoproteins/processing of proteins/forms lysosomes/formation of vesicles
F. Lysosomes: hydrolysis/digestion/breakdown of structures that are not needed within cells
2.3.4
A.
B.
C.
D.
E.
F.
G.
H.
I.
nucleoid / no nucleus / nuclear membrane
naked DNA / no histones
no mitochondria
no Golgi / no ER
circular DNA
no / very few membrane-bound organelles
ribosomes smaller / 70S
no mitosis / meiosis
flagella lack internal microtubules
vs.
vs.
vs.
vs.
vs.
vs.
vs.
vs.
vs.
nucleus / nuclear membrane;
DNA associated with protein / histone;
mitochondria present;
Golgi / ER present;
linear DNA;
membrane-bound organelles;
ribosomes larger / 80S;
mitosis / meiosis;
flagella have microtubules (9+2);
2.3.5
Plant cells:
A. have cell walls, animal cells do not;
B. have plastids / chloroplasts, animal cells do not;
C. have a large central vacuole, animal cells do not;
D. store starch, animal cells store glycogen;
E. have plasmodesomata, animal cells do not;
Animal cells:
F. have centrioles, plant cells do not;
G. have cholesterol in the cell membrane, plant cells do not;
H. plant cells generally have a fixed shape / more regular whereas animal cells are more rounded;