Cells
All cells have a number of features in common with each other
- For a cell to be a cell, it has to have the following components:
Cellular components & functions table
- There are two distinct types of cell – eukaryotic and prokaryotic
Author
LáraExpertise
Biology Lead
All cells have a number of features in common with each other
Cellular components & functions table
Animal and plant cells are both eukaryotic cells as their genetic material is packaged in a nucleus
Prokaryotic cells do not have a nucleus, and are much smaller than eukaryotic cells
Prokaryotic cells table
Make sure you are comfortable converting between different units
You need to be aware that many subcellular structures in eukaryotic cells are the same size as or bigger than prokaryotic cells!
Size of cells table
A common exam question is to ask you to calculate the size of subcellular structures and then to suggest why they may or may not be present in a certain type of cell. For example: Why do bacterial cells not contain mitochondria?
Practise converting numbers into standard form – you may be asked to do this in the exam!
Take care to look at the units in which measurements of cells and subcellular structures are given.
to absolutely everything:
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Lára graduated from Oxford University in Biological Sciences and has now been a science tutor working in the UK for several years. Lára has a particular interest in the area of infectious disease and epidemiology, and enjoys creating original educational materials that develop confidence and facilitate learning.