CAIE A Level Biology 9700 · Cell structure
A student uses a light microscope to observe a section of liver tissue and sees what appears to be a single large structure. When the same tissue is viewed using a transmission electron microscope, the student sees that the 'large structure' is actually many separate smaller structures.
Describe why the electron microscope is able to reveal more detail than the light microscope.
4 marks, so the mark scheme is looking for about 4 separate creditworthy points. Making the same point twice in different words earns it once.
Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.
Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.