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Infectious Disease and Immunity
Quick questions on Pathogens: bacteria and viruses: H2 Biology Infectious Disease and Immunity
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What are viruses?Show answer
A virus is not a cell. It is a particle of genetic material (DNA or RNA) enclosed in a protein coat (the capsid), sometimes with a lipid envelope. A virus cannot reproduce by itself.
What is q1?Show answer
State one structural feature present in a bacterium but absent in a virus. [1 mark]
What is q2?Show answer
Explain why a virus cannot reproduce outside a host cell. [2 marks]
What is q3?Show answer
State two ways a pathogen can be transmitted from one host to another. [2 marks]
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