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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

3.2.7 The Effects of Lung Disease – Unit exam questions

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  • Questions count: 12
  • Passing grade: B+
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1.
Thrombin converts:
Prothrombin to thrombin
Fibrin to fibrinogen
Fibrinogen to fibrin
Plasma to serum
2.

During exercise, heart rate increases because

the vagus nerve is stimulated
the cardiovascular control centre sends impulses along the sympathetic nerve to the SAN
CO₂ falls
blood pH rises
3.
In a potometer experiment on wind, what is the independent variable?
Distance the bubble moves
Type of plant
Wind speed (fan setting)
Room temperature
4.
Leaves coated with petroleum jelly on the lower surface lose far less mass than uncoated ones. What does this show?
Upper surfaces have most stomata
Most water is lost through stomata on the lower surface
Jelly adds mass
Water leaves through roots
5.
Why do the potato cylinders at 0.8 mol/dm³ lose mass?
Sucrose enters and dissolves the potato
The solution is hypotonic
Active transport pumps water out
The solution is hypertonic, so water leaves the cells by osmosis
6.
Which statement best describes Phagocyte?
The pale yellow liquid part of blood that carries dissolved substances, hormones and heat.
A white blood cell that engulfs and digests pathogens (phagocytosis).
A molecule on the surface of a pathogen that triggers an immune response.
The net movement of water molecules from a dilute solution to a more concentrated solution through a partially permeable membrane.
7.
Which statement best describes Surfactant?
Substance that lowers surface tension in alveoli preventing collapse.
Blood and water flow in opposite directions, maintaining a concentration gradient.
Opening on an insect's body surface leading to the tracheae.
Pores on leaves that allow gas exchange, controlled by guard cells.
8.
Which hypothesis suits a potometer experiment?
Plants are green
Water is wet
Water uptake will increase as wind speed increases
Fans are loud
9.
Which statement best describes Lymph?
Tendency of water to move into blood due to plasma proteins.
Graph of percentage saturation of haemoglobin against partial pressure of oxygen.
Binding of one O2 changes haemoglobin shape making further binding easier.
Excess tissue fluid drained into lymph vessels.
10.
IGCSE Biology 9.2 Heart - Question 1
IGCSE Biology 9.2 Heart - Question 1
A
B
C
D
11.
Which is NOT an adaptation of alveoli?
Walls one cell thick
Rich blood supply
Large surface area
Thick cartilage rings
12.
Why do red blood cells lack a nucleus?
To divide faster
To make antibodies
To store glucose
To hold more haemoglobin
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Part of 3. Exchange and Transport — see every lesson and quiz in this unit.
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