AQA GCSE Trilogy Biology Paper 1 Foundation June 2024 question paper 8464/B/1F

This question is about cells.

Figure 1 shows an animal cell.

Label parts A, B and C on Figure 1.

Choose answers from the box.

What is the function of the nucleus in a cell?

Tick (✓) one box.

What is the function of the mitochondria in a cell?

Tick (✓) one box.

Figure 2 shows a light microscope.

A student is given a prepared slide of animal cells to view using the microscope.

Complete the sentences.

Use labels from Figure 2.

Place the slide on the.

Use the objective lens that has low power.

Direct the light by moving the.

Make the image larger by using the high power

Figure 3 shows a different animal cell.

Calculate the magnification of the image in Figure 3.

Complete the following steps.

Measure the width of the image from Y to Z, in millimetres (mm).

Give the width of the image in micrometres (µm).

1 mm = 1000 μm

The cell in Figure 3 has a real width of 40 micrometres (μm).

Use the equation to calculate the magnification.

A student investigated the loss of mass from leaves that were placed in winds of different speed.

The student used an electric fan to create different wind speeds.

Figure 4 shows the apparatus.

This is the method used.

1. Record the mass of one leaf taken from a plant.

2. Attach the leaf to a stand.

3. Leave for 1 hour with the fan off.

4. Record the final mass of the leaf.

5. Repeat steps 1 to 4 with the fan set at different speeds. Use leaves of a similar size each time.

6. Calculate the loss of mass for each leaf.

Table 1 shows the results.

Why did the student do one experiment with the fan off?

How does increasing fan speed affect the loss of mass from the leaves?

Use Table 1.

Explain why the mass of the leaves decreased at all fan speeds.

The student repeated the investigation in a room at a higher temperature.

Complete the sentence.

Choose the answer from the box.

At a higher temperature the loss of mass from the leaves

would be.

How could the student check the repeatability of the results?

Tick (✓) one box.

Figure 5 shows different parts of blood.

Which letter shows a white blood cell?

Tick (✓) one box.

Which part of the blood causes the blood to clot?

Tick (✓) one box.

Name two substances transported in the blood.

Healthy people can volunteer to donate blood.

The donated blood is then given to patients who need the blood.

When a volunteer donates blood:

• the volunteer’s health is checked

• a needle is used to remove blood from a vein in the arm

• the volunteer rests for 15 minutes after the donation.

Suggest one reason why blood is removed from a vein and not from an artery.

Patients may receive blood during a medical emergency.

Donating blood and receiving blood has risks.

Suggest one advantage and one disadvantage to a patient who receives blood.

Suggest one advantage and one disadvantage to the volunteer who donates blood.

This question is about disease.

Gonorrhoea is a sexually transmitted disease.

Which is a symptom of gonorrhoea?

Tick (✓) one box.

Table 2 shows the number of reported cases of gonorrhoea for 5 cities.

The number of cases of gonorrhoea in each city might not be accurate.

Suggest one reason why.

Which is the best way to present the data from Table 2 ?

Tick (✓) one box.

The data is given as per 100 000 of the population and not as the total number of people with gonorrhoea.

Suggest why.

Deposits can form in coronary arteries.

The deposits are called plaques.

Plaques cause damage to the arteries.

Figure 6 shows plaques in a coronary artery.

Which two factors increase the risk of plaques forming in the coronary artery?

Tick (✓) two boxes.

Which treatment can be used for the plaques in Figure 6 ?

Tick (✓) one box.

A heart attack can happen when plaques block a coronary artery.

During a heart attack muscle cells in the heart die.

Explain how the blockage can lead to the death of muscle cells in the heart.

This question is about photosynthesis.

Complete the equation for photosynthesis.

Choose answers from the box.

What is the chemical formula for glucose?

Tick (✓) one box.

Give two ways plants use the glucose produced by photosynthesis.

A person has two greenhouses.

In each greenhouse, the plants:

• are all the same type

• receive the same intensity of light and the same volume of water

• grow in the same type of soil.

Figure 7 shows the greenhouses.

The person burns logs in the wood burner in greenhouse B.

Explain why the plants in greenhouse B grow faster than the plants in greenhouse A.

Drinks contain different substances.

A drinks company claims that a drink contains sugar, protein and fat.

Glucose and fructose are different sugars.

Fructose has a much sweeter taste than glucose.

Suggest two reasons why the drinks company uses fructose in the drink rather than using glucose.

Do not refer to sweetness in your answer.

Describe how a student could test the drink for sugar.

Give the colour of a positive result.

Colour of positive result

Describe how a student could test the drink for protein.

Give the colour of a positive result.

Colour of positive result

The human digestive system breaks down protein and fat in the drink.

Describe how protein and fat are digested.

You should include:

• the enzymes involved

• where the enzymes are produced.

A student investigated the concentration of salt in solution Z.

The student used a method involving osmosis.

The student used tubing made of partially permeable membrane.

This is the method used.

1. Cut six pieces of tubing to the same length.

2. Tie one end of each piece of tubing.

3. Put the same volume of solution Z into each piece of tubing.

4. Tie the other end of each piece of tubing to form a sealed tube.

5. Record the mass of each tube.

6. Place each tube into a different concentration of salt solution.

7. After 2 hours, remove each tube from the salt solutions.

8. Record the mass of each tube.

Figure 8 shows one of the sealed tubes in a salt solution.

What was the independent variable for the investigation?

Tick (✓) one box.

The student dried the outside of each tube with a paper towel before recording the mass.

Why was it important to dry the tubes?

Table 3 shows the results.

Calculate value X in Table 3.

Give your answer to 1 decimal place.

Complete Figure 9.

You should:

• plot the percentage change in mass from Table 3 for salt concentrations of only 0.2 mol/dm³ to 1.0 mol/dm³

• draw a line of best fit.

One of the results has been plotted for you.

Determine the concentration of salt in solution Z.

Use Figure 9.