HIV (Human Immunodeficiency Virus) is a pathogen - AQA - GCSE Biology - Question 1 - 2010 - Paper 1
Question 1
HIV (Human Immunodeficiency Virus) is a pathogen.
How is HIV spread from one person to another person?
Tick (✓) one box.
Coughing
Sexual intercourse
Touching d... show full transcript
Worked Solution & Example Answer:HIV (Human Immunodeficiency Virus) is a pathogen - AQA - GCSE Biology - Question 1 - 2010 - Paper 1
Step 1
How is HIV spread from one person to another person?
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Answer
HIV is primarily spread through sexual intercourse.
Step 2
What could cause a decrease in the number of new HIV cases in the future?
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Answer
An increase in effective health education can lead to a decrease in new HIV cases.
Step 3
How could a vaccine work to prevent a person being infected with HIV?
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Answer
The stages in order should be:
C: An inactive form of the virus is injected into the body.
E: White blood cells produce antibodies to the inactive virus.
A: Antibodies attach to the inactive virus.
B: Antibodies destroy the inactive virus.
D: If the active virus enters the body, antibodies are produced quickly.
Step 4
What is the next stage in testing the vaccine?
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Answer
The next stage in testing the vaccine is Testing on healthy volunteers.
Step 5
Why is it difficult to develop safe drugs to destroy viruses?
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Answer
It is difficult because drugs that destroy viruses also damage body tissues.
Step 6
Draw one line from each drug to the plant the drug originated from.
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Answer
Aspirin - Willow
Digitalis - Foxglove
No association for Rose and Tobacco as neither is directly linked to any drug listed.
