Biology · May / June 2021 · Paper 41 · Question 1

prokaryote / plant ;

letter from cell function

cell structure

Fig. 1.1 storage of genes

nucleus

G

mitochondria

E

OR

to make protein

(rough) endoplasmic

F reticulum / (R)ER

0.002 (mm) ;

length of, drawing / image / Fig. 1.2 (in mm) ;

total of six from:

similarities, max four from:

single cell / unicellular / AW ;

(cell) wall / A ;

cytoplasm / D ;

ribosomes / H ;

cell membrane / B ;

DNA / genetic material ;

differences, max four from: ;;;;

(bacteria have)

(yeast have)

no nucleus / no G / has nucleoid

nucleus / G

loop / coil / AW, of DNA

linear DNA / chromosome no, (rough) endoplasmic

(rough) endoplasmic reticulum reticulum / ER

no mitochondria / no E

mitochondria / E

no (large / permanent)

(large / permanent) vacuole / C vacuole / no C

plasmid(s)

no plasmids

no membrane-bound, cell

membrane-bound, cell

structures / organelles

structures / organelles

1 = nitrogen fixation ;

2 = deamination ;

3 = nitrification ;