What are the two types of microscopes? - Light Microscope
Electron Microscope
What is the magnifying power of a light microscope? - x 2,000
What is the magnifying power of an electron microscope? - x 2,000,000
What is the resolving power? - The ability to distinguish between two separate points...
All of AQA GCSE Biology (9-1) - Paper 1
What are the two types of microscopes? - ✔✔✔Light Microscope
Electron Microscope
What is the magnifying power of a light microscope? - ✔✔✔x 2,000
What is the magnifying power of an electron microscope? - ✔✔✔x 2,000,000
What is the resolving power? - ✔✔✔The ability to distinguish between two separate points
What is the resolving power of light microscopes? - ✔✔✔200 nm
What is the resolving power of electron microscopes? - ✔✔✔0.2 nm
What are the advantages of light microscopes? - ✔✔✔1. living samples
2. can view samples in colour
What are the disadvantages of electron microscopes? - ✔✔✔1. dead samples
2. samples in black and white
What can they do with electron microscopes to make them coloured? - ✔✔✔Dye them or colour them
in
How do you work out magnification? - ✔✔✔Image size / Object size
,How do you work out image size? - ✔✔✔Magnification x Object size
How do you work out object size? - ✔✔✔Image size / Magnification
How do you convert cm to mm? - ✔✔✔x 10
How do you convert um (micrometres) to mm? - ✔✔✔/ 1000
How do you convert mm to um (micrometres)? - ✔✔✔x 1000
What does an animal cell contain? - ✔✔✔Cytoplasm, Nucleus, Ribosomes, Mitochondrion, Cell
Membrane
Where is the nucleus located in an animal cell? - ✔✔✔The centre
What does the nucleus do? - ✔✔✔It controls the activities of the cell
What is the role of the cytoplasm? - ✔✔✔Where chemical reactions take place
Does an animal cell have a cell wall? - ✔✔✔No, it does not
What is the role of the cell membrane? - ✔✔✔Controls the ENTRY and EXIT of SUBSTANCES inside the
cell
What is the role of mitochondria/on? - ✔✔✔Creates energy by aerobic respiration
,What does aerobic respiration mean? - ✔✔✔It requires oxygen
What is the role of ribosomes? - ✔✔✔Where protein synthesis takes place
What kind of shape is a plant cell? - ✔✔✔Rectangular
What kind of shape is an animal cell? - ✔✔✔Circular
What does a plant cell contain? - ✔✔✔Chloroplast
Starch grain
Cell Membrane
Cell Wall
Nucleus
Mitochondrion
Cytoplasm
What is the role of the cell wall? - ✔✔✔Supports and protects the cell
What is the role of the vacuole? - ✔✔✔contains cell sap
Why is a plant cell rectangular? - ✔✔✔Due to the cell wall - strong
Where is the nucleus placed in a plant cell? - ✔✔✔In one corner/side
, What is the role of chloroplasts? - ✔✔✔Full of a pigment called chlorophyll
This is where photosynthesis takes place
What are bacteria responsible for? - ✔✔✔Diseases such as tuberculosis, cholera.
What does a bacterial cell contain? - ✔✔✔Pilli
Plasmid
Ribosomes
Cytoplasm
Plasma membrane
Cell wall
Capsule
Bacterial Flagellum
Nucleoid - circular DNA
What is the purpose of a flagella to a bacterial cell? - ✔✔✔Helps it to move
What is the crucial thing about a bacterial cell? - ✔✔✔There is no distinct nucleus - have nucleoid
instead
What is a plasmid? - ✔✔✔Genetic information
What is the purpose of dendrites on a nerve cell? - ✔✔✔Allows the cells to make lots of connections
with other cells
Why do nerve cells have such a long axon? - ✔✔✔It forms the length of the neurone
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