3 (a) Chlamydia is caused by a pathogen - Edexcel - GCSE Biology - Question 3 - 2019 - Paper 1
Question 3
3 (a) Chlamydia is caused by a pathogen.
(i) Chlamydia is transmitted by
A insect vectors
B sneezing
C sexual intercourse
D contaminated food
(ii) The type... show full transcript
Worked Solution & Example Answer:3 (a) Chlamydia is caused by a pathogen - Edexcel - GCSE Biology - Question 3 - 2019 - Paper 1
Step 1
Chlamydia is transmitted by
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Answer
The correct answer is C sexual intercourse. Chlamydia is primarily transmitted through sexual contact.
Step 2
The type of pathogen that causes chlamydia is a
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Answer
The correct answer is A bacterium. Chlamydia is caused by the bacterium Chlamydia trachomatis.
Step 3
Describe the trend in the number of cases of chlamydia between 1996 and 2013.
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Answer
The trend shows a steady increase in the number of chlamydia cases from 1996 to around 2003, followed by fluctuations with a slight increase up until 2013. The overall pattern indicates that the cases remained relatively high over this period.
Step 4
State the number of cases of chlamydia per 100000 in 2013.
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Answer
The number of chlamydia cases per 100000 in 2013 is 1800.
Step 5
Calculate the number of people with chlamydia in 2013.
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Answer
Given that the population of the United Kingdom in 2013 was 64,000,000 and the number of cases per 100,000 was 1800, the calculation is as follows:
Number of cases = (64,000,000 / 100,000) * 1800 = 1,152,000 cases of chlamydia in 2013.
