In an electron micrograph, a mitochondrion is 36 mm long. The scale bar shows that 20 mm represents 1 µm. Calculate the actual length of the mitochondrion.
From Mock A · Paper 1 (topics 1–4)
2.23 marks
Describe and explain how cell fractionation and ultracentrifugation can be used to obtain a sample of mitochondria.
From Mock B · Paper 1 (topics 1–4)
5.22 marks
In a drawing, a cell is 4.5 cm long. Its actual length is 15 µm. Calculate the magnification.
From Mock C · Paper 1 (topics 1–4)
6.13 marks
Compare the transmission electron microscope with the optical microscope.
From Mock C · Paper 1 (topics 1–4)
6.22 marks
40 eyepiece graticule divisions match 100 µm on a stage micrometer. A cell is 18 divisions long. Calculate its length.
Score 0 / 12 · 0 of 5 marked
This paper is written by Plasmo in the style of the AQA A-Level Biology exam. It is not a past paper and is not produced or endorsed by the exam board.