Cells Flashcards
1
Q
Cell membrane
A
- Provides a boundary between living cells and external world
- Hydrophobic layer prevents polar and large molecules passing, highly hydrophobic molecules will enter and not leave
- Breaking the barrier can be done by adding molecules which tunnel and/or disrupt the membrane - can make them leaky or create a channel to pass things through the membrane
2
Q
Nucleous
What it does
A
- Site of ribosome production
- Synthesises proteins using RNA
3
Q
Mitochondria
A
- Production of ATP
- Have its own DNA, transcription and translation machinery
4
Q
Endoplasmic reticulum (rough and smooth)
A
- Rough - covered in ribosomes, produces proteins
- Smooth - more involved in lipid biosynethesis
5
Q
Golgi apparatus
A
- Lipid and membrane proteins can be transported by vesicles from the ER to be processed more and packaged off
6
Q
Ribosomes
A
- Produces proteins by translating mRNA into polypeptides via tRNAs
- Found in the cytoplasm, mitochondria and rough ER
7
Q
Endosomes and lysosomes
A
- Endosomes are membrane enclosed compartments that do transporting, they become acidic and turn into lysosomes
- Lysosomes break down contents
