Cell Structure, Organisation, and Microscopy
Question 1 of 5
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Biology Q & A Practice 1 of 5 A-Level exam-style exercises in this topic
Measurement or observationValue
Image length72 mm
Scale-bar image18 mm
Scale-bar value0.50 µm
Figure 1: evidence supplied for the question

An electron micrograph shows a mitochondrion with an image length of 72 mm. The scale bar is 18 mm long and represents 0.50 µm. What is the actual length of the mitochondrion?

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