42.
What role do growth factors have in cancer?
Select one:
They bind to E2F, skipping the G1 checkpoint
They result in too many cyclins, affecting Rb and E2F
They bind to Cdk, skipping the G1 checkpoint
They make cells grow faster
They bind to Cdk, resulting in the S phase proceeding
43.
With respect what can cause cells to become cancerous, what isthe significance of adding a phosphate (P) to the molecule Rb?
Select one:
it causes the release of growth factors
it deactivates E2F, stopping the cell cycle
it releases E2F resulting in cells producing more growthfactors
it releases E2F resulting in cells replicating chromosomes andeventually dividing
it causes the binding of cyclins to Cdk
44.
Individuals that are carriers of the Cystic Fibrosis allele____________:
Select one:
must always have children with the disease
have no chance of having children with the disease
have a heterozygous genotype
have the disease
have a homozygous genotype
46.
A cyclin-dependent kinase (Cdk) is ________.
Select one:
a growth factor in cells
a molecule that binds to cyclins in the cell cyclecheckpoints
used to substitute for E2F in cancer cells
part of the chiasmata in meiosis
used in mitosis to move the chromosomes
