Cell organelles T3 Flashcards
1
Q
Describe three structural differences between prokaryotic and eukaryotic cells.
(3)
A
- Presence of membrane bound organelles in eukaryotic, such as mitochondria.
- Presence of plasmids in prokaryotic.
- Larger ribosomes in eukaryotic.
- Eukaryotic DNA in nucleus.
- DNA/Chromosome in eukaryotic linear, circular in prokaryotic.
- Cell walls always present in prokaryotic, not always in eukaryotic.
2
Q
What is meant by molecular phylogeny.
3
A
- Molecular dif./sim.
- In DNA and RNA.
- In proteins.
- Evolutionary relationship between organisms.
3
Q
How do you calculate magnification?
A
image size/ actual size x magnification
4
Q
Describe the roles of the Golgi apparatus and vesicles in the formation and transport of extracellular enzymes.
(4)
A
- Vesicles fuse with/proteins enter Golgi apparatus.
- Modification of proteins inside Golgi apparatus.
- Protein/enzyme packaged into secretory vesicles.
- Vesicles fuse with cell surface membrane.