Question

52. The levels of different _________ change during the cell cycle to control events specific to that stage of the cycle.

1. Rabs
2. Kinetochores
3. Cyclins
4. Integrins

53. The adhesion molecule family that mediates cell to extracellular matrix adhesion is the

1. Integrins
2. Cadherins
3. Ig Superfamily CAMs
4. Receptor tyrosine kinases
5. GPCRs

54. Because of __________ small molecules cannot travel between the cells of the epithelium to get from one side of the epithelium to the other

1. Desmosomes
2. Adherens junctions
3. Gap junctions
4. Tight junctions
5. None of the above

55. The extracellular matrix is composed of

1. Glycosaminoglycans
2. Proteoglycans
3. Glycoproteins
4. All of the above
5. None of the above

56. The extracellular matrix specialization at the basal side of epithelia is called the

1. Basal plate
2. Basal surface
3. Basal lamina
4. Basal endothelium
5. Basal microvilli

Answer 1

52. Option C is correct
The levels of cyclins determine the transition o=from one stage to the next stage in the cell cycle

53. Option A is correct
Integrins mediate adhesion to the ECM and cell-cell interactions.

54. Option D is correct
Occluding junctions = Tight junctions do not allow the movement of small molecules.

55. Option D is correct
The ECM is composed of Glycosaminoglycans, Proteoglycans, and glycoproteins.

56. Option C is correct
The extracellular matrix specialization at the basal side of epithelia is called the BASAL LAMINA = BASEMENT MEMBRANE

Please provide a POSITIVE RATING. Thank you