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Question 17N.2.SL.TZ0.a

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Date November 2017 Marks available [Maximum mark: 1] Reference code 17N.2.SL.TZ0.a
Level SL Paper 2 Time zone TZ0
Command term State Question number a Adapted from N/A
a.
[Maximum mark: 1]
17N.2.SL.TZ0.a

The figure shows a transmission electron micrograph of rotavirus particles. Each rotavirus is about 70 nanometres in diameter.

[Source: CDC / Dr. Erskine L. Palmer]

State a reason for using an electron microscope to view this virus rather than a light microscope.

[1]

Markscheme

electron microscope has greater resolution/magnification

OR

70 nm is too small/viruses are too small to be viewed by a light microscope

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