1. CB1 – Overarching Concepts (P11-19)
Enzymes - Label the diagram:
Explain in detail what is meant by the lock and key theory of enzymes.
Transport - complete the table
Core Practical –
1. What equipment would you need to investigate osmosis in carrots and sugar solutions of different concentrations?
2. Use the graph to
estimate the
concentration of sugar
in the carrot.
Diagram
Description
Example in plants
Diffusion
Osmosis
Active Transport
Enzyme graphs
Q2) What does the term ‘optimum temperature’ mean?
Q3) Why is there a decrease in enzyme activity between 40oC and 63oC?
Questions
Q1) Why is there an increase in activity from 0oC and 40oC?
Applying maths
Convert the following to standard form:
Convert the following to normal form:
2.45x105
6.10x10-3
5.55x107
8.18x10-12
Convert the following to metres:
10,345mm
12km
145,000nm
754,000,000pm
12,000µm
13,333nm
Cells - complete the table about specialised cells
Microscopes – complete the table
Calculate the actual size of an image if it appears to be 4cm with a magnification of 100x.

2. CB1 – Overarching Concepts (P11-19)
Enzymes - Label the diagram:
Explain in detail what is meant by the lock and key theory of enzymes.
The active site is similar to a lock and the substrate is similar to a key. They have complimentary shapes. This shows how different enzymes can only break down specific substrates.
Transport - complete the table
Core Practical –
1. What equipment would you need to investigate osmosis in carrots and sugar solutions of different concentrations?
2. Use the graph to
estimate the
concentration of sugar
in the carrot. 0.3mol/dm3
Diagram
Description
Example in plants
Diffusion
Osmosis
Active Transport
Enzyme graphs
The particles have more kinetic energy and therefore there will be more successful collisions
Q2) What does the term ‘optimum temperature’ mean? The temperature that enzymes work best at
Q3) Why is there a decrease in enzyme activity between 40oC and 63oC? Because enzymes get to hot and their active sites change shape. This means the substrate doesn’t fit in. This is denaturing.
Questions
Q1) Why is there an increase in activity from 0oC and 40oC?
Movement of particles from a high to low concentration
Gases exchange in leaves
Movement of water particles from a high to low concentration across a partially permeable membrane
Water in roots
Movement of particles form a low to a high concentration. Requires energy.
Minerals in roots
Apple corer, electronic balance, paper towel, different concentrations of sucrose, test tubes.
Applying maths
Convert the following to standard form:
= 1.58x108
= 9.35x106
= 3.40x10-7
= 6.62x10-3
Convert the following to normal form:
2.45x105 = 245,000
6.10x10-3 =
5.55x107 = 55,500,000
8.18x10-12 =
Convert the following to metres:
10,345mm = m
12km = 12,000m
145,000nm = m
754,000,000pm = m
12,000µm = 0.012m
13,333nm = m
Cells - complete the table about specialised cells
Root hair cell
Absorbs water & minerals
Large surface area
Microscopes – complete the table
- Tail
- Acrosome (releases enzymes)
Sperm cell
Fertilises egg cell
x1,500
x100,000
light
electrons
Small intestinal cell
Absorbs nutrients
Microvilli for large surface area 2D 3D
Thin slice on slide
Coated in gold and in a vacuum
Calculate the actual size of an image if it appears to be 4cm with a magnification of 100x. 4 ÷ 100 = 0.04cm
Ciliated cell
Removes dust from trachea
Moving hairs (cilia)