Paper 1 Revision

Question 1

What are TWO similarities between a bacterial cell and an animal cell? [2 marks]

Answer 1

• both have a cell membrane
• both have cytoplasm

Question 2

Give ONE symptom of salmonella food poisoning.

Do NOT refer to vomiting or diarrhoea in your answer. [1 mark]

Answer 2

Fever or Abdominal Pain

Question 3

Suggest why doctors do NOT give antibiotics to patients with minor infections. [1 mark]

Answer 3

to reduce / prevent antibiotic
resistance

Question 4

This question is about cell division.

Write the biological structures from the box in the correct order of size. ( SMALLEST TO LARGEST ) [1 mark]

**cell - chromosome - gene - nucleus **

Answer 4

1. gene
2. chromosome
3. nucleus
4. cell

Question 5

In humans a fertilised egg cell contains 23 pairs of chromosomes.

How many chromosomes will there be in each of the embryo cells? [1 mark]

Answer 5

46

25 Pairs (of Chromosomes)

Question 6

Give ONE way that cell division by mitosis is important in FULLY GROWN animals. [1 mark]

Answer 6

repair of tissues
or
replacement of cells

Question 7

Amylase is an enzyme that digests starch.

Which organs in the human digestive system produce amylase? [1 mark]

Answer 7

salivary glands, pancreas and
small intestine

Question 8

What is the independent variable?

Answer 8

Something you do/can change