Required Practicals Flashcards
(26 cards)
What is the purpose of the required practicals in AQA GCSE Combined Biology?
To develop practical skills and understanding of biological concepts.
True or False: Required practicals are not assessed in the final exam.
False
Fill in the blank: The first required practical involves investigating the effect of __________ on enzyme activity.
temperature
What is the main enzyme used in the enzyme activity practical?
amalayze
Which substrate is commonly used when investigating enzyme activity?
Hydrogen peroxide
What measurement is often taken to assess enzyme activity?
The amount of oxygen produced
What is the second required practical in the AQA GCSE Combined Biology curriculum?
Investigating the effect of pH on enzyme activity.
True or False: A control is not necessary in practical experiments.
False
What is the purpose of a control in an experiment?
To provide a baseline for comparison.
What does the term ‘variable’ refer to in an experiment?
A factor that can change and affect the outcome.
List the three types of variables in an experiment.
Independent variable, dependent variable, controlled variables.
What is the primary focus of the third required practical?
Investigating photosynthesis using aquatic plants.
Which plant is commonly used to investigate photosynthesis?
Elodea
True or False: Light intensity affects the rate of photosynthesis.
True
What is one method to measure the rate of photosynthesis?
Counting the number of oxygen bubbles produced.
What is the fourth required practical about?
Investigating the effect of different concentrations of salt on plant cells.
What is osmosis?
The movement of water across a semi-permeable membrane from a region of lower solute concentration to a region of higher solute concentration.
What type of solution causes plant cells to become turgid?
Hypotonic solution
What happens to plant cells in a hypertonic solution?
They become plasmolyzed.
What is the fifth required practical focused on?
Investigating the effect of light intensity on the rate of photosynthesis.
Fill in the blank: The __________ is used to measure the rate of transpiration in plants.
potometer
What is the main factor affecting transpiration rates?
Temperature and humidity
What should be kept constant in the transpiration practical?
The surface area of the leaves.
True or False: AQA GCSE Combined Biology includes practical assessments.
True
