B1 Flashcards
B1
Name four sub-cellular structures of animal cell
Nucleus, cell membrance, mitochondria and ribosomes.
What is the fuction of ribosomes
They make new proteins for a cell
What is plasmid DNA
Small loop of DNA found in bacteria
How would you go from lilli to micro to nano to pico
Multiply by 1000 each time
Why do we stain the specimen cells
To make the sub-cellular structures more visible
What is a catalyst
A substances that speeds up the rate of reaction
What is osmosis
movement of water
State the colour of the iodine solution before and after its contact eith starch.
No starch= yellow/ orange
starch= blue/black
How do you calculate percentages change in mass
final mass- intitial mass x100
intitial mass
How are cancer cells formed
mutation in the DNA causes uncontrolbelled cell divsion
