2. Chlamydia is caused by a pathogen - Edexcel - GCSE Biology Combined Science - Question 2 - 2019 - Paper 1
Question 2
2. Chlamydia is caused by a pathogen.
(i) Chlamydia is transmitted by
A insect vectors
B sneezing
C sexual intercourse
D contaminated food
(ii... show full transcript
Worked Solution & Example Answer:2. Chlamydia is caused by a pathogen - Edexcel - GCSE Biology Combined Science - Question 2 - 2019 - Paper 1
Step 1
Chlamydia is transmitted by
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Answer
The correct answer is C sexual intercourse, as chlamydia is primarily transmitted through sexual contact.
Step 2
The type of pathogen that causes chlamydia is
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Answer
The correct answer is A bacterium, since 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 number of cases of chlamydia shows an overall increasing trend from 1996 to 2013, with fluctuations throughout the years. Initially, there was a gradual rise, with some peaks in certain years, reflecting changes in infection rates.
Step 4
State the number of cases of chlamydia per 100,000 in 2013.
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Answer
In 2013, the number of cases of chlamydia was approximately 1,600 per 100,000 people.
Step 5
Calculate the number of people with chlamydia in 2013.
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Answer
To calculate the number of people with chlamydia in 2013, you can use the formula:
ext{Number of cases} = rac{ ext{Cases per 100,000} imes ext{Population}}{100,000}
Using the data: 1,600 cases per 100,000 and a population of 64,000,000:
ext{Number of cases} = rac{1,600 imes 64,000,000}{100,000} = 1,024,000
Thus, there were approximately 1,024,000 people with chlamydia in 2013.
