MARK SCHEME
BIOLOGY P1 EDITION
HE
A
Y T E CHE
C
O
S
J
Item 5 Item 1
20% 20%
EA
JOY!
YOUR P
Item 4 Item 2
20% 20%
BY
YT AT
ED
TO L
H
Item 3
20%
U E
SU
CCESS, F
S
JO
Get your green pens ready-
this will be a rough one...
, 1. CELL BIOLOGY
1A. (2 MARKS)
PROKARYOTIC CELLS DO NOT HAVE A
NUCLEUS, WHEREAS EUKARYOTIC CELLS
ES
DO. (1)
PROKARYOTIC CELLS ARE GENERALLY
SMALLER THAN EUKARYOTIC CELLS. (1)
CH
1B. (3 MARKS)
USE THE FORMULA: ACTUAL SIZE =
IMAGE SIZE / MAGNIFICATION (1)
CALCULATION: 60 MM ÷ 200 = 0.3 MM
EA
(1)
CONVERT TO MICROMETERS: 0.3 MM =
300 ΜM (1)
YT
1C. (4 MARKS)
CORRECTLY PLOTS A GRAPH WITH
STAGES OF MITOSIS ON THE X-AXIS
AND NUMBER OF CELLS ON THE Y-AXIS.
JO
(1)
CORRECT LABELING OF EACH STAGE.
(1)
MOST CELLS ARE IN INTERPHASE,
INDICATING IT IS THE LONGEST STAGE.
(1)
EXPLAINS THAT INTERPHASE IS WHEN
THE CELL GROWS AND PREPARES FOR
DIVISION. (1)
BIOLOGY P1 EDITION
HE
A
Y T E CHE
C
O
S
J
Item 5 Item 1
20% 20%
EA
JOY!
YOUR P
Item 4 Item 2
20% 20%
BY
YT AT
ED
TO L
H
Item 3
20%
U E
SU
CCESS, F
S
JO
Get your green pens ready-
this will be a rough one...
, 1. CELL BIOLOGY
1A. (2 MARKS)
PROKARYOTIC CELLS DO NOT HAVE A
NUCLEUS, WHEREAS EUKARYOTIC CELLS
ES
DO. (1)
PROKARYOTIC CELLS ARE GENERALLY
SMALLER THAN EUKARYOTIC CELLS. (1)
CH
1B. (3 MARKS)
USE THE FORMULA: ACTUAL SIZE =
IMAGE SIZE / MAGNIFICATION (1)
CALCULATION: 60 MM ÷ 200 = 0.3 MM
EA
(1)
CONVERT TO MICROMETERS: 0.3 MM =
300 ΜM (1)
YT
1C. (4 MARKS)
CORRECTLY PLOTS A GRAPH WITH
STAGES OF MITOSIS ON THE X-AXIS
AND NUMBER OF CELLS ON THE Y-AXIS.
JO
(1)
CORRECT LABELING OF EACH STAGE.
(1)
MOST CELLS ARE IN INTERPHASE,
INDICATING IT IS THE LONGEST STAGE.
(1)
EXPLAINS THAT INTERPHASE IS WHEN
THE CELL GROWS AND PREPARES FOR
DIVISION. (1)
