BIOTECHNOLOGY
1.
Which line in the table below describes
correctly the structure of algae?
2.
The length of the protozoan,
Paramecium
,
is 0·15 mm.
The length of the
Paramecium
in micrometres
(1 millimetre = 1000 micrometres) is
A 0·00015
B 0·015
C 1·5
D 150.
3.
The diagram below shows a protozoan.
The function of structure X is to
A control the activities of the cell
B remove excess water
C control the entrance and exit of materials
D make food.
4.
Viruses have a
A DNA/RNA core and a non-cellular
structure
B protein core and a non-cellular structure
C DNA/RNA core and a cellular structure
D protein core and a cellular structure.
5.
The branched key below shows the shapes and
arrangement of some bacteria.
Use the key to identify the micro-organism
shown below.
A
Clostridium
B
Diplococcus
C
Staphylococcus
D
Streptococcus
6.
The enzyme amylase breaks down
A cellulose
B glucose
C lactose
D starch.
Page three
[X008/201]
[Turn over
Nucleus
Cell
membrane
Cell wall
A
Present
Present
Present
B
Absent
Present
Absent
C
Present
Absent
Absent
D
Present
Absent
Present
SECTION A
All questions in this Section should be attempted.
Answers should be given on the separate answer sheet provided.
X
Bacteria
Cocci
Not in
chains
Groups of
more than two
Staphylococcus
Groups of two
Diplococcus
Chains
Streptococcus
Chains
Streptobacillus
Not in chains
Clostridium
Bacilli
Page four
Questions 7 and 8
are based on the information shown in the graph below.
The change in the number of
B
.
subtilis
growing in nutrient broth culture at 30 °C for 20 hours is
shown in the graph.
7.
During which 4 hour period did the number of
B. subtilis
double in the nutrient broth culture?
A 4 – 8 hours
B 6 – 10 hours
C 8 – 12 hours
D 12 – 16 hours
8.
The percentage increase in the number of
B. subtilis
in the nutrient broth culture between
0 hours and 6 hours is
A 33·3%
B 75%
C 300%
D 400%.
250
200
150
100
048121620
50
0
Time (hours)
Number of
B. subtilis
(millions/cm
3
)
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