What is the monomer of microtubules?
Tubulin is a homodimer.
The addition of tubulin monomers to a microtubule is quicker at which end?
The positive end
The negative end
Microtubules are more rigid than microfilaments.
Is the positive or negative end of the microtubule embedded inside the centromere?
Microfilaments are a double helix of actin
A role of intermediate filaments is to provide strength and support to cells.
Intermediate filaments are:
Distributed broadly around the cell
Distributed only in specific areas of the cell
Microtubule motors are energy dependent (i.e. they require ATP.)
Which of these microtubule motors are minus end directed?
Kinesin moves things towards the cell body/nucleus.
Which of the following statements are true regarding collagen:
i) it has a triple-helical structure
ii) collagen molecules run at right angles to each other
iii) there are approximately 20-40 variants
iv) collagen is made by ribosomes which are freely moving in the cytoplasm
if ii) and iii) are true
if ii), iii) and iv) are true
if i), ii) and iii) are true
if i) and iii) are true
Is elastin a highly hydrophobic or hydrophilic protein?
The extracellular matrix helps regulate cell differentiation
Tight junctions are which type of cell junction:
Tight junctions allow the specialisation of membranes.
Adheren junctions link to:
Desmosomes attach cells to the basal lamina.
Which molecule attaches desmosomes to each other?
Which molecule attaches tight junctions to each other?
Which molecule attaches hemidesmosomes to the basal lamina?
Focal adhesions attach cells to the extracellular matrix by the use of:
Integrins and actin filaments
Cadherins and intermediate filaments
Integrins and intermediate filaments
Cadherins and actin filaments