GCSE AQA Biology Combined Science Cell Structure: Bacteria can cause a variety of

Question

Bacteria can cause a variety of diseases in humans.

What are two similarities between a bacterial cell and an animal cell?

Tick (✔) two boxes.

Both have a cell membrane.
Both have a cell wall.
Both have a nucleus.
Both have cytoplasm.
Both have plasmids.

Salmonella food poisoning is caused by bacteria in food.

Give one symptom of salmonella food poisoning.

Do not refer to vomiting or diarrhoea in your answer.

What is the name of the first antibiotic developed?

A child with a severe bacterial infection was given a course of antibiotics.

Figure 1 shows how the concentration of live bacteria in the child's body changed when taking the course of antibiotics.

The concentration of live bacteria in the body continued to increase after starting the course of antibiotics.

Suggest one reason why.

After 3 days of taking the antibiotic;

- the child felt better
- there were still bacteria in the child's body.

Why did the child feel better?

Tick (✔) one box.

Bacteria had become immune to the antibiotic.
The child had become resistant to the bacteria.
There were fewer toxins in the body than at day 0.

Suggest why doctors do not give antibiotics to patients with minor infections.

A vaccine will stimulate the production of antibodies.

Which part of the blood in Figure 2 produces antibodies?

Tick (✔) one box.

A
B
C
D

Which part of the blood in Figure 2 starts the clotting process?

Tick (✔) one box.

A
B
C
D

Bacteria can cause a variety of diseases in humans - AQA - GCSE Biology Combined Science - Question 1 - 2022 - Paper 1