Pearson Edexcel IGCSE · Biology

Variety of living organisms: Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Variety of living organisms.

10 questions24 marksFree, no account

Question 1

1 mark

Which of the following diseases is caused by a virus that infects the immune system in humans?

Question 2

1 mark

Which statement correctly describes a structural difference between plants and animals?

Question 3

1 mark

Which of the following is an example of a pathogenic protoctist mentioned in the syllabus that is responsible for causing malaria?

Question 4

1 mark

What is the typical shape of the bacterium Pneumococcus, which acts as a pathogen causing pneumonia?

Question 5

1 mark

Which of the following is a structural feature commonly found in bacterial cells that consists of a small, circular piece of DNA separate from the main chromosome?

Question 6

2 marks

What is meant by the term pathogen, and which four groups of organisms can include pathogenic species?

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Question 7

3 marks

Distinguish between the cellular features of the protoctists Amoeba and Chlorella.

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Question 8

6 marks

Explain how the mycelium structure of a multicellular fungus is adapted to its method of nutrition.

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Question 9

4 marks

Protoctists are often described as a 'dustbin' kingdom because they are so diverse.
(a) Name a protoctist that lives in pond water and has features similar to an animal cell. (1)
(b) Chlorella is a protoctist that possesses a specific organelle not found in Amoeba. Name this organelle. (1)
(c) Plasmodium is a pathogenic protoctist. Name the disease it is responsible for causing. (1)
(d) State whether all protoctists are multicellular or single-celled. (1)

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Question 10

4 marks

Viruses are unique particles that differ significantly from living cells.
(a) Describe two structural components that make up a virus particle. (2)
(b) Explain why viruses can only reproduce inside the cells of other living organisms. (1)
(c) Give the full name of the virus that causes 'flu'. (1)

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