Dcpip - Study guides, Revision notes & Summaries
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Biology Edexcel Practicals A Level Questions With Complete Solutions
- Exam (elaborations) • 6 pages • 2024
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Biology Edexcel Practicals A Level Questions With Complete Solutions 
 
1. Investigate the effect of caffeine on heart rate of Daphnia - Topic 1 
Daphnia of same species and volume 
Placed on microscopic tray in pond water in bits of cotton and allowed to acclimatise for 5 minutes 
Then HR counted using tally marks of a sheet of paper for 15 seconds, x4 to give hr/min 
repeated with unknown conc. of caffeine (blind) 
0.0% and distilled water, 0.1% and 0.5% 
Repeat with each daphnia and with othe...
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Biology Edexcel Practicals A Level Questions With Complete Solutions
- Exam (elaborations) • 6 pages • 2024
- Available in package deal
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- £3.45
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Biology Edexcel Practicals A Level Questions With Complete Solutions 
 
1. Investigate the effect of caffeine on heart rate of Daphnia - Topic 1 
Daphnia of same species and volume 
Placed on microscopic tray in pond water in bits of cotton and allowed to acclimatise for 5 minutes 
Then HR counted using tally marks of a sheet of paper for 15 seconds, x4 to give hr/min 
repeated with unknown conc. of caffeine (blind) 
0.0% and distilled water, 0.1% and 0.5% 
Repeat with each daphnia and with othe...
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LATEST 2024 iGCSE CIE Biology Paper 6 Revision
- Exam (elaborations) • 2 pages • 2024
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- £7.68
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What is an independant variable? - ANSWERS-The variable that is changed by the 
investigator 
What is a dependant variable? - ANSWERS-A variable that changes and is measured 
What is a control variable? - ANSWERS-A variable that should be kept constant so as 
to not affect the result of the dependant variable 
How can you make an experiment better? - ANSWERS-Do it 3 times and then take an 
average. Exclude anomalies from your average. 
How many decimal places should you answer with? - ANSWERS-If...
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AP Biology Multiple Choice Exam 2023 with 100% correct questions and answers
- Exam (elaborations) • 11 pages • 2023
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A dog is following the scent of a jackrabbit. Which of the following accurately describes how the dog's brain integrates information for smell? 
A) Chemoreceptors in the brain send impulses for smell in the nasal cavity. 
B) Chemoreceptor cells in the nasal cavity sends impulses to the appropriate area of the brain. 
C) Chemoreceptors on epithelial cells of the tongue send hormones to the appropriate area of the brain. 
D) Receptors originating in the nose send action potentials to the motor re...
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iGCSE CIE Biology Paper 6 Revision
- Exam (elaborations) • 2 pages • 2024
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- £8.07
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iGCSE CIE Biology Paper 6 Revision 
What is an independant variable? - ANSWERS-The variable that is changed by the 
investigator 
What is a dependant variable? - ANSWERS-A variable that changes and is measured 
What is a control variable? - ANSWERS-A variable that should be kept constant so as 
to not affect the result of the dependant variable 
How can you make an experiment better? - ANSWERS-Do it 3 times and then take an 
average. Exclude anomalies from your average. 
How many decimal plac...
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Required practical 8 - the effect of dehydrogenase activity on chloroplast write up
- Summary • 3 pages • 2022
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A detailed organised write up for required practical 8 of AQA A level biology - the effect of ammonium hydroxide on the time taken for chloroplasts to decolourise DCPIP. This includes a full methodology, hazards, risks, limitations, conclusion and. references.
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Vitamin C content of food and drink
- Other • 4 pages • 2023
- Available in package deal
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- £5.99
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Full CPAC 2 write up which achieved passing grade and fulfilled all necessary criteria for Biology Edexcel
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iGCSE CIE Biology Paper 6 Revision
- Exam (elaborations) • 2 pages • 2023
-
- £8.84
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iGCSE CIE Biology Paper 6 Revision 
What is an independant variable? - ANSWERS-The variable that is changed by the 
investigator 
What is a dependant variable? - ANSWERS-A variable that changes and is measured 
What is a control variable? - ANSWERS-A variable that should be kept constant so as 
to not affect the result of the dependant variable 
How can you make an experiment better? - ANSWERS-Do it 3 times and then take an 
average. Exclude anomalies from your average. 
How many decimal plac...
-
iGCSE CIE Biology Paper 6 Revision
- Exam (elaborations) • 2 pages • 2023
-
- £6.15
- + learn more
iGCSE CIE Biology Paper 6 Revision 
What is an independant variable? - ANSWERS-The variable that is changed by the 
investigator 
What is a dependant variable? - ANSWERS-A variable that changes and is measured 
What is a control variable? - ANSWERS-A variable that should be kept constant so as 
to not affect the result of the dependant variable 
How can you make an experiment better? - ANSWERS-Do it 3 times and then take an 
average. Exclude anomalies from your average. 
How many decimal plac...
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Photosynthesis and the Hill reaction CPAC 11
- Other • 8 pages • 2023
- Available in package deal
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- £8.99
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Full CPAC 11 write up which achieved passing grade and fulfilled all necessary criteria for Biology Edexcel
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