| Date | May 2009 | Marks available | 1 | Reference code | 09M.1.HL.TZ2.7 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 7 | Adapted from | N/A |
Question
What conclusion can be drawn from examining the action spectrum for a green plant shown below?
A. Yellow light is the most effective at promoting photosynthesis.
B. Every colour of light is equally effective at promoting photosynthesis.
C. Light of wavelength 550 nm is least effective at promoting photosynthesis.
D. Light in the green range is the most effective at promoting photosynthesis.
Markscheme
C
Examiners report
This question proved to be too easy, as almost all candidates answered correctly.
Syllabus sections
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