Biology Paper 1

Subdecks (3)

What do light microscopes do?
Allow you to see outline of cells
What do electron microscopes do?
Allow you to visualise the finer details (etc.organelles)
What are eukaryotic cells?
Cells with a nucleus and membrane-bound organelles.
What are prokaryotic cells? 
Cells without a nucleus.
What is mitosis? 
Mitosis is the process of cell division in which a single cell divides into two identical daughter cells.
What are stem cells?
Stem cells are undifferentiated cells that have the ability to develop into different types of specialized cells in the body.
Where are stem cells found?
Animal embryos,plant meristems and the bone marrow
What are embryo clones useful for?
It can be made of a person to harvest skin cells and it can be used to treat conditions without it being rejected by the patients body
What is diffusion? 
Diffusion is the movement of particles from an area of high concentration to an area of low concentration.
What is osmosis? 
Osmosis is the movement of water molecules from an area of lower solute concentration to an area of higher solute concentration across a semi-permeable membrane.
What is active transport?
Active transport is the movement of molecules or ions across a cell membrane against their concentration gradient.