Active transport is the final method of how particles move that you need to know.
Surprise, surprise, you should be familiar with your this text-book definition.
Tag: Cell Biology
Osmosis
The movement of particles is a vital process and happens in various ways. Osmosis is similar to diffusion but has a couple of differences.
Again you should try to remember this text-book definition.
Diffusion
Diffusion is one of the key concepts you need to learn for GCSE. With diffusion you will know why if some sprays some deodorant or perfume in one corner of the room why it spreads everywhere else.
You will need to know this text-book definition.
Mitosis
Cell division is an important function for example growth and repair. We call this process mitosis.
You need to know what happens during this process including how the amount of DNA changes.
DNA and Chromosomes
Inside your cells, specifically the nucleus, contains all the genetic information, DNA, that makes us the way that we are. We get our DNA from out parents, half from mum and half from dad, and they are stored in tightly coiled bunches called chromosomes.
Humans have 23 pairs of chromosomes, 46 in total, 23 from each parent. The information on these chromosomes gives us our hair colour, eye colour, skin colour etc …
Microscopes
There are 2 types of microscopes you need to know about for your exams. They are:
- Light Microscope
- Electron Microscope
You would have used a light microscope in the practical looking at the onion cells or your own cheek cells.
But what are the differences between the 2?
Stem Cells
After looking at specialised cells you should know that not all the cells are the same, but where do they come from? How are they made?
Stem Cells are responsible for creating these specialised cells.
Specialised Cells
You should have looked at the typical structures of plant and animal cells. The human body is made up of a couple of hundred different types of cells. You will need to give examples of specialised cells, cells adapted for a specific job.
Below shows different specialised cells and their basic adaptations.
Eukaryotes vs Prokaryotes
You will need to know the differences and similarities between Eukaryotes and Prokaryotes.
The table below will help you.
Magnification Calculations
After looking at cells under a microscope you may be asked to do a few calculations.
Below is the triangle you can use for your revision with the 3 equations needed. I always remember it as AIM!!
