3 marksFoundationRequired practical 054.4.1.2 Rate of photosynthesis
AQA Trilogy 8464
Spec and skills
Paper scope: B1
Spec 4.4.1.2
Original practice question
Answer and supported method checks
A student put some pondweed in a beaker of water under a lamp. She collected the oxygen given off in an upturned 25 cm³ measuring cylinder that was full of water at the start.
The measuring cylinder's scale starts at 0 cm³ at its closed end, which is now at the top. As oxygen collects at the top, it pushes the water down.
After 10 minutes, the boundary between the oxygen and the water was at the 4.0 cm³ mark.
.1
What volume of oxygen did the student collect?
[1 mark]
.2
Calculate the rate of oxygen production in cm³ per minute.
[1 mark]
.3
Another student counted the bubbles of oxygen instead.
Suggest why measuring the volume of gas gives more accurate results than counting bubbles.
[1 mark]
5 marksFoundation and Higher4.4.2.1 Aerobic and anaerobic respiration4.1.1.3 Cell specialisation
AQA Trilogy 8464
Spec and skills
Paper scope: B1
Spec 4.4.2.1
Spec 4.1.1.3
Original practice question
Answer and supported method checks
Heart muscle contracts all the time, throughout life.
.1
Explain why heart muscle cells contain many mitochondria.
[2 marks]
.2
Compare aerobic respiration with anaerobic respiration in muscle cells.
[3 marks]
6 marksFoundation and Higher4.3.1.6 Human defence systems4.3.1.7 Vaccination
AQA Trilogy 8464
Spec and skills
Paper scope: B1
Spec 4.3.1.6
Spec 4.3.1.7
Original practice question
Answer and supported method checks
White blood cells help to defend the body against pathogens.
.1
What are the molecules on the surface of a pathogen that white blood cells recognise as foreign?
[1 mark]
.2
Describe three ways white blood cells defend the body against pathogens.
[3 marks]
.3
A person has antibodies against the measles virus. These antibodies do not protect the person against the mumps virus.
Explain why.
[2 marks]
4 marksFoundation4.1.1.2 Animal and plant cells4.1.1.1 Eukaryotes and prokaryotes
AQA Trilogy 8464
Spec and skills
Paper scope: B1
Spec 4.1.1.2
Spec 4.1.1.1
Original practice question
Answer and supported method checks
Animal cells, plant cells and bacterial cells contain different structures.
.1
What is the function of mitochondria?
[1 mark]
.2
Name the structure in a plant cell that absorbs light for photosynthesis.
[1 mark]
.3
Which two structures are found in a bacterial cell? Tick two boxes.
[2 marks]
8 marksFoundation and Higher4.1.3.1 Diffusion4.1.3.3 Active transport
AQA Trilogy 8464
Spec and skills
Paper scope: B1
Spec 4.1.3.1
Spec 4.1.3.3
Original practice question
Answer and supported method checks
A student models a small organism as a cube with sides 3 cm long.
.1
Calculate the total surface area of the cube.
[2 marks]
.2
Calculate the volume of the cube.
[1 mark]
.3
Calculate the surface area to volume ratio of the cube.
[1 mark]
.4
A larger organism has a smaller surface area to volume ratio.
Explain why a large multicellular organism needs exchange surfaces and a transport system.
[2 marks]
.5
Explain why root hair cells need energy to take in mineral ions from the soil.
