HBV infects a liver cell - AQA - A-Level Biology - Question 7 - 2021 - Paper 2
Question 7
HBV infects a liver cell. The liver cell is 25 µm in diameter.
Use Figure 7 to calculate how many times larger in diameter this cell is than HBV.
You should use th... show full transcript
Worked Solution & Example Answer:HBV infects a liver cell - AQA - A-Level Biology - Question 7 - 2021 - Paper 2
Step 1
Calculate the diameter of HBV
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Answer
From Figure 7, the lipid layer of the HBV is indicated as 10 nm. To convert this to micrometers (µm), we note that 1 µm = 1000 nm. Therefore, the diameter of HBV in µm is:
extDiameterofHBV=100010 nm=0.01 µm
Step 2
Calculate how many times larger the liver cell is than HBV
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Answer
The diameter of the liver cell is 25 µm. To find out how many times larger the liver cell is than HBV, we divide the diameter of the liver cell by the diameter of HBV:
extTimeslarger=0.01 µm25 µm=2500
Thus, the liver cell is 2500 times larger than the HBV.
