CAIE A-Level Biology A2 12.2.14 Respirometer Investigations Questions
Explain respirometer investigations and interpret results using evidence from each question and mark scheme.
- Syllabus
- 2028–2030
- Course
- Biology 9700
- Level
- A2
Exam points
- Explain respirometer investigations and interpretation of results.
CAIE A-Level Biology A2 12.2.14 Respirometer Investigations Questions question 1
[Maximum number: 7]
Describe how you would carry out an investigation, using a simple respirometer, to measure the effect of temperature on the respiration rate of insect larvae.
any seven from:
1 detail of placing larvae in respirometer ;
e.g. on gauze / use spoon
2 use and role of, KOH / AW;
3 water bath / maintain temperature ;
4 choose 4 different temperatures ;
5 mark initial position of liquid drop ;
6 leave for set time ;
7 measure distance moved by drop (in set time) ;
8 (use tap to) reset respirometer ;
9 (at least 3 ) replicates ;
10 calculate mean values ;
11 calculate rate as distance ÷ time ;
12 plot graph of rate v temperature ;
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