Mark the Exam Questions: What do you think the mark scheme should

say?

Hand-washingAseptic Technique1. Lid open for

shortest time

2. Bunsen burner

3. Clean work area

4. Tape plate afterwards

Patient A came in to see his doctor, he has had a nasty flu for a week and wants medicine to treat it.

The doctor prescribes penicillin. Is this right?

Memorise...

Recreate!

Virus Structure

Genetic Material – either DNA or RNA

Protein coat called capsid – made of capsomeres

Small: Smaller than bacteria

Reproduce inside host

HIV

Capsid is cone shaped

Contains enzyme: Reverse Transcriptase

Retrovirus

Spread of HIV

1. Sexual Intercourse

2. Sharing needles

3. Blood Transfusion

4. Across Placenta

How

HIV C au ses D

is eas e

Extension:A new antiviral therapy is being designed against integrase, a HIV enzyme that is used by the virus to integrate its genetic material into the host cells DNA. Explain how this type of drug could disrupt virus replication without affecting the host cell