Biology · Oct / Nov 2020 · Paper 22 · Question 2
5090
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The question as text
In 1931 a scientist was pouring the powdered form of a chemical called PTC into a bottle. A small amount of the powder accidentally blew into the air. A short time later another scientist working in the same room said that she had a bitter taste in her mouth from the powder in the air.
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2(a)[4]
2(b)(i)[1]
2(b)(ii)[1]
2(c)(i)[1]
2(c)(ii)[1]
2(c)(iii)[2]
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