Transcript Explain - Deans Community High School

List the structures in a plant cell and explain
what their function is.
State which ones are also found in animal
cells.
Parts of the Cell
Part
Function
Found in
Nucleus
Controls the cell’s
functions
Both
Cytoplasm
Site of all the
chemical reactions
Both
Cell Membrane
Controls entry and
exit of substances
Both
Vacuole
Contains cell sap,
gives support to the
cell
Chloroplasts
Site of photosynthesis
contain chlorophyll
Cell wall
Gives shape to the
cell, prevents lysis
Plant cells only
Green plant cells only
Plant cells only
Give a dictionary definition of diffusion
and explain 2 differences between
diffusion and osmosis.
Diffusion is the movement of molecules
from a high concentration to a low
concentration until they are evenly
spread out.
Osmosis is the movement of water
molecules from an area of high water
concentration to an area of low water
concentration through a selectively
permeable membrane.
Explain where in the body diffusion
takes place.
Diffusion in a Multi-cellular Animal
1.
2.
3.
Write down the 6 stages of mitosis.
Why is it important that the chromosome complement is
maintained?
Why is mitosis important in unicellular and multicellular
organisms?
What are enzymes made from?
What is the function of enzymes?
Why are they called biological catalysts?
Why are they said to be specific?
Enzymes
•
•
•
•
Are biological catalysts
Are found in all living cells
Are proteins
Are specific i.e. they only work on one
substrate
• Catalyse synthesis and breakdown
reactions
Explain how temperature affects
enzyme activity.
Describe the range and optimum pH of
enzymes.
What are the 2 possible reactions an
enzyme can carry out and give an
example of an enzyme, its substrate and
its product for each.
Degradation – to break down
Amylase – starch into maltose
Synthesis – to build up
Phosphorylase – glucose-1-phosphate into
starch
How would you define the term metabolism?
All the chemical reactions taking place
within an organism.
What is the equation for aerobic
respiration?
What is the purpose of respiration?
What are the waste products of
respiration?
• Glucose+ oxygen → CO2 + H2O + Energy
• Respiration is the release of energy
from food using oxygen
• The waster products are carbon dioxide
and water
• What is the name of this piece of equipment and explain how it
works.
• What is the purpose of the soda lime?
• You are measuring the respiration rate of a small animal, what
would you need to change to set up a control?