Unit 1.2b(i) Flashcards
Why do eukaryotic membranes gave a wide variety of intracellular membranes?
To give them an increased membrane area
Do eukaryotes have a small or large surface area to volume ratio?
A small surface area
On its own can the plasma membranes carry out all the required, vital membrane functions?
No it can’t because its too small in area
What are all the animal cells membrane bound organelles?
SER, RER, Golgi Apparatus, Lysosomes, Vesicles
What does ER stand for?
Endoplasmic Reticulum
What is the ER?
A network of membrane tubules continuous with the nuclear membrane.
What happens in the ER?
Lipids and proteins are synthesised
What are the two parts of the ER?
Rough and Smooth
What is the RER like?
It has ribosomes and it’s cytosolic face
What does cytosolic mean?
Facing away from the nucleus into the cell
What is the SER like?
It lacks ribosomes
What is the Golgi Apparatus?
It’s a series of flattened membrane discs where proteins undergo post-translational modifications
What do lysosomes contain?
A variety of hydrolases
What are hydrolases?
Enzymes that catalyse the cleavage of covalent binds within water
What are digested in lysosomes?
Proteins, lipids, nuclei acids and carbohydrates
