Other Features Of Eukaryotic Cells Flashcards
What is the diameter of the spherical organelle ribosome?
20 nanometers
What are ribosomes made of?
Ribosomal RNA
What is the function of ribosomes?
Synthesis of proteins
Ribosomes free in the nucleus synthesise proteins for use in the cell
What are centrioles made of?
Two bundles of microtubules that are perpendicular to each other
They are made of tubulin subunits
What shape are centrioles?
Cylindrical
What are the functions of centrioles?
To make spindles during cell division
To make cilia and undulipodia
How are cilia and undulipodia made?
By centrioles.
Centrioles multiply and lie beneath the plasma membrane of the cell
The release microtubules up into the plasma membrane which then go on to form cilia and undulipodia
What s the cytoskeleton?
A network of protein structures within the cytoplasm
How large are microfilaments? And what are they made out of?
7 nanometers in diameter
What are the rod like microfilaments made of?
Subunits of the protein actin
How large are intermediate filaments?
10 nm in diameter
What do protein microfilaments do?
Provide support and mechanical strength, keep the cells shape stable and allow for cell movement
What do microtubules do?
Provide the tack which motor proteins walk and drag organelles across the cell on.
What motor proteins move organelles throughout the cell?
Dynein and kinesin
What do intermediate filaments do?
Anchor the nucleus in the cytoplasm
