General

Question 1

Structures animal cells have that plant cells don’t

Answer 1

Centrioles, centrosomes, lysosomes

Question 2

Structures plant cells have that animal cells don’t

Answer 2

Cell wall, chloroplasts, plasmodesmata, plastids used for storage, large central vacuole

Question 3

Why do eukaryotes have membrane bound organelles?

Answer 3

Compartmentalisation- increases rate and efficiency of chemical reactions
Increased SA on which prcesses can take place
Organisation of protein movement through cell

Question 4

Ribosome size in prokaryotes and eukaryotes

Answer 4

prokaryotes= 70S (10-20nm)
eukaryotes= 80S (22nm)

Question 5

DNA in prokaryotes and eukaryotes

Answer 5

prokaryotes- ‘naked’ DNA (not associated with proteins, lipids, or any other molecule to help protect it

eukaryotes- DNA as chromosomes (DNA associated histone proteins)

Question 6

Evidence that mitochondria were once prokaryotes

Answer 6

Have ribosomes to carry out own protein synthesis
Have DNA genome inside
Are a similar size to bacteria

Question 7

What is turgor pressure?

Answer 7

Pressure of cell contents against cell wall