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Assignment pack

Assignment Pack
National 5 Biology
Science Faculty
N5 and Higher
Assignment Write Up Checklist
Name of pupil: ___________________________
Class: __________
Producing the report:
The report must be all your own work
When producing your report, you will be supervised by your teacher at all times.
You have 1 hour and 30 minutes to complete your report.
Your teacher cannot provide you with feedback or tell you how to improve your
Report Stage Checklist:
Instructions for candidates
Underlying Science research notes relevant to your aim
Experimental method
Raw experimental data
Internet or literature data/information
Reference to the Internet or literature data/information
I have checked that the materials to be used by candidates in the report stage are not previously
prepared drafts.
Teacher Signature: _____________________________
Date: _______________
You will pick one of 3 experiments to do.
How sugar effects respiration
How pH effects enzyme activity
How water concentrations effects osmosis
Main stages for assignment
Aim (1), Using your experiment title you will need to come up with an aim
Underling biology (3)
You need to find information on your chosen topic. You will be provided
with some questions to help your research.
This will be written in paragraphs
You will get a chance to look at examples of this.
Experiment (10)
For your experiment you will need to follow the instructions.
You will then Wright a simple explanation of the method.
Following this you will make a table based on your results.
You will then use this table in the write up stage and calculate an average
of your results.
You will then need to make a graph of your averages
Internet research (2)
You will then need to find information form the internet or textbooks to
compare your data with another set of data.
There are some sources provided or you can use the Internet to find your
You need to make a reference of you Internet data.
Analysis (1), you will need to compare your data to the Internet data
Conclusion (2)
Next you will make conclusions based on your experiment comparing it to
your internet research and relating this to your aim
Evaluation (2)
Finally you will look at ways to improve your experiment.
Experiment 1 Respiration
1. The equations for aerobic respiration?
2. The equations for fermentation in yeast?
3. What chemical controls respiration?
4. What is the main difference between aerobic respiration and
5. Describe the stages of aerobic desperation?
6. Describe the stages of fermentation?
7. Where does aerobic respiration take place?
8. Where does fermentation take place?
9. What are the limiting factors for respiration?
10. What are the limiting factors for fermentation?
11. How much ATP is formed in Arabic respiration?
12. How much ATP is formed in fermentation?
13. How does temperature effect rates of respiration?
14. Why does temperature have this effect?
Fresh yeast
Boiling tubes
10 % Sugar solution
stirring rod
Weighing boats
Water bath
Measuring cylinder
Cling film
1. Weigh 120g of flour
2. Add 8g of fresh yeast
3. Mix in 80ml of sugar solution
4. Mix with a glass rod until it stats to become solid
5. Weigh out 16x 10g balls of dough
6. Shape into a torpedo shape and roll in flour
7. Place in boiling tube and tap down with stirring rod
8. Mark the height of the dough
9. Cling film top of boiling tube and seal with tape
10. Place in water baths at chosen temperatures.
11. Leave for 24 hours (48 hours).
12. Measure distance between top of dough and original height
Experiment 2 Enzymes
1. What is the function of an enzyme
2. Name and describe the 2 types of reaction carried out by an enzyme
3. Draw a diagram to show how enzymes work on substrate to make a
4. What is meant by optimum conditions
5. How do optimum conditions relate to body temperature
6. How does pH effect the shape and function of enzymes
7. What is the optimum pH for catalase
8. What is the equations for catalase braking down hydrogen peroxide
9. What type of reaction does catalase carry out.
Selection of different pH solutions
Hydrogen peroxide
Boiling tubes
Stop clock
1. Add 10ml of hydrogen peroxide to the boiling tube
2. Add 5 drops of detergent to boiling tube
3. Add 5ml of pH buffer to boiling tube
4. Add 2ml of catalase to test tube
5. Repeat for each pH
6. Run the experiment for 5 minutes
7. Measure the height of the foam
Experiment 3 osmosis
1. Describe the structure of the cell membrane.
2. Draw a diagram to show osmosis in a beaker
3. What is a concentrations gradient
4. What is passive transport
5. What is osmosis
6. Does passive transport need energy
7. What type of transport need energy
8. What happens to plant cells in high water concentrations
9. What happens to plant cells in low water concentrations
10. What would happen to the mass of a cell that has become plasmolysis
11. What would happen to a cell that has become turgid?
12. What would happen to an animal cell in a low water concentration
13. What would happen to animal cell in a high water concentration?
14. Why do different things happen in plant and animal cell when in different
water concentration? Why?
15. If a solution has a high salt concentration what can you say about the
water concentration
16. If a solution has a low salt concertation what can you say about the water
Boiling tubes
Cork borer
Range of sugar solutions
Paper towel
1. boar out 3 potato cores
2. cut each to 5cm weigh each core
3. place in boiling tubes
4. cover with 20 ml of sugar solution
5. repeat step 1-4 for each sugar concentration
6. leave for 24h
7. remove from sugar solution
8. blot dry using paper towel
9. weigh each potato core
Appendix 1 Source Information
Experiment 1 Respiration
mperatureonFermentation.pdf (https://www.quora.com/What-is-the-effect-oftemperature-on-the-rate-of-budding-of-yeast)
Experiment 2 Enzyme
Experiment 3 Osmosis
Appendix 2 write up sheet
Experimental write up
Independent variable
Dependant variable
Controlled variable
Method summary
Rough data table
Data table
Data table with average calculation
Analyse of data
Evaluation of experiment
Appendix 3 Help Sheet
Aim, your aim should contain your dependent and independent variables
and also state what the experiment hopes to prove
Your variables are important to know when writing your report
You must summarise the method into a simple paragraph
Make a rough table on what data you will collect (your teacher will look at
this before you start your experiment. Make sure heading are all correct
and detailed
Make a need table after collecting results
Make a neat table that has and extra Colum for averages
You must be able to say in relation to your aim what your experiment has
You must identify a factor that had an effect of the reliability of your
experiment, You must then explain:
— What you did to minimise the effect of this factor
— What you could have done to minimise the effect of this factor
— How you know this factor had a significant effect