IB Diploma Programme (DP) - SL & HL · Biology

A2.3 Viruses (Cells, HL): Practice Questions

5 multiple-choice questions marked as you go, and 3 written questions with worked solutions. All on A2.3 Viruses (Cells, HL).

8 questions15 marksFree, no account
Question 1
1 mark

What is the primary difference between the lytic cycle and the lysogenic cycle of a virus?

Question 2
1 mark

Some viruses, such as the Influenza virus, possess an outer envelope. From where is this envelope primarily derived?

Question 3
1 mark

Influenza viruses are notorious for their ability to rapidly evolve, often necessitating annual vaccine reformulation. This rapid evolution is primarily due to two processes: antigenic drift and antigenic shift. Which statement correctly differentiates these two processes concerning the influenza virus?

Question 4
1 mark

What is the primary function of viral surface glycoproteins?

Question 5
1 mark

Which of the following is a characteristic specifically associated with the lysogenic cycle of a virus, distinguishing it from the lytic cycle?

Question 6
2 marks

State the structural components that all viruses share, regardless of their diversity in shape and size.

Write your answer out first, then check it against the worked solution.

Question 7
3 marks

Explain why the enzyme reverse transcriptase is essential for the life cycle of retroviruses, such as HIV, once they have entered a host cell.

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Question 8
5 marks

Retroviruses, such as HIV, possess a unique enzyme crucial for their replication cycle. Identify this enzyme and explain its function in the context of the host cell's genetic material.

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