Universal Organelles

Question 1

Ribosomes Structure:

Answer 1

Two subunits made of RNA and protein; larger in eukaryotes (80s) than prokaryotes (70s).

Question 2

Ribosomes Function:

Answer 2

Site of polypeptide synthesis (this process is called translation).

Question 3

Cytoskeleton Structure:

Answer 3

A filamentous scaffolding within the cytoplasm (fluid portion of the cytoplasm is the cytosol.)

Question 4

Cytoskeleton Function:

Answer 4

Provides internal structure and mediates intracellular transport (less developed in prokaryotes).

Question 5

Plasma Membrane Structure:

Answer 5

Phospholipid bilayer embedded with proteins (not an organelle per se, but a vital structure.

Question 6

Plasma Membrane Function:

Answer 6

Semi-permeable and selective barrier surrounding the cell.