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Course: AQA A Level Biology 7402
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AQA A Level Biology 7402

1. Biological Molecules

0/102

2. Cell Structure

0/95

3. Exchange and Transport

0/98

4. Genetics, Variation and Interdependence

0/94

5. Energy Transfers In and Between Organisms (A Level only)

0/63

6. Organisms Respond to Changes in their Environments (A Level only)

0/93

7. Genetics, Populations, Evolution and Ecosystems (A Level only)

0/55

8. The Control of Gene Expression (A Level only)

0/72

9. Exam Guidance and Skills

0/38
Quiz

2.2.2 Microscopy and Drawing Scientific Diagrams – Unit exam questions

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  • Questions count: 12
  • Passing grade: B+
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1.
IGCSE Biology 2.1 Animal and Plant Cells - Question 8
IGCSE Biology 2.1 Animal and Plant Cells - Question 8
A
B
C
D
2.
Which cell does HIV primarily infect?
B cells
Red blood cells
T helper cells
Neutrophils
3.
B cell meets antigen, differentiates into plasma and memory cells, plasma cells produce antibodies that eliminate the antigen. This sequence describes
B cell meets antigen, differentiates into plasma and memory cells, plasma cells produce antibodies that eliminate the antigen. This sequence describes
cell-mediated immunity.
humoral immunity.
nonspecific immunity.
phagocytosis.
cytotoxic T-cell maturation.
4.
Which structure is found in prokaryotic cells?
Nucleus
Mitochondrion
70S ribosome
Golgi apparatus
5.
Which statement best describes Mitochondrion?
A double-membraned organelle with folded cristae, the site of aerobic respiration and ATP production.
The organelle containing chromosomes (DNA with histones), surrounded by a double membrane with pores.
A small circular loop of DNA in prokaryotes, often carrying genes such as antibiotic resistance.
Stacks of flattened membrane sacs that modify, package and sort proteins and lipids into vesicles.
6.
Pathogens escape the immune system by generating new surface antigens. Which is an example of this antigenic variation?
Pathogens escape the immune system by generating new surface antigens. Which is an example of this antigenic variation?
HIV remaining integrated into the host genome for many years
The flu virus changing its envelope proteins
MRSA becoming resistant to many antibiotics
Multiple sclerosis attacking cells of the nervous system
7.
Which best describes passive immunity?
Long-lasting and slow to develop
Produced by vaccination
Involves memory cells
Short-term and immediate
8.

The typical thickness of a cell surface membrane is about

7 μm
7 nm
70 nm
0.7 mm
9.
What happens to membrane fluidity if phospholipids contain more unsaturated fatty acids?
It decreases
It increases
No change
The membrane solidifies
10.
IGCSE Biology 3.1 Diffusion - Question 7
IGCSE Biology 3.1 Diffusion - Question 7
A
B
C
D
11.
Cholesterol molecules in an animal cell membrane
transport glucose
act as receptors for hormones
reduce changes in fluidity when temperature changes
form channels for ions
12.
IGCSE Biology 2.1 Animal and Plant Cells - Question 12
IGCSE Biology 2.1 Animal and Plant Cells - Question 12
A
B
C
D
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Part of 2. Cell Structure — see every lesson and quiz in this unit.
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