Question 1
Unit 4 style
A Level only (what this means)
A Level only: only in the full A Level, not the AS Level. AS Level students can skip it. What the labels meanWhich feature is present in HIV but not in lambda phage?
- An envelope containing viral glycoproteins
- A protein capsid
- Nucleic acid as genetic material
- Reproduction only inside a host cell
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Question 2
Unit 4 style
A Level only (what this means)
A Level only: only in the full A Level, not the AS Level. AS Level students can skip it. What the labels meanCompare and contrast the structure of a bacterium with the structure of a virus such as tobacco mosaic virus.
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Question 3
Unit 4 style
A Level only (what this means)
A Level only: only in the full A Level, not the AS Level. AS Level students can skip it. What the labels meanExplain what is meant by the terms lytic and latency in relation to viruses.
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Question 4
Unit 4 style
A Level only (what this means)
A Level only: only in the full A Level, not the AS Level. AS Level students can skip it. What the labels meanDescribe how HIV enters a helper T cell and is replicated.
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Question 5
Unit 4 style
A Level only (what this means)
A Level only: only in the full A Level, not the AS Level. AS Level students can skip it. What the labels meanExplain how infection with Mycobacterium tuberculosis can lead to damage to the lungs.
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Question 6
Unit 4 style
A Level only (what this means)
A Level only: only in the full A Level, not the AS Level. AS Level students can skip it. What the labels meanDescribe how the skin, the stomach and the gut flora help to protect the body from infection.
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Question 7
Unit 4 style
A Level only (what this means)
A Level only: only in the full A Level, not the AS Level. AS Level students can skip it. What the labels meanA nurse is infected with a pathogen after a needle-stick injury. By which route did the pathogen enter her body?
- Through the gas exchange system
- Through the digestive system
- Through a break in the skin
- Across the placenta