Question 1
The retinoblastoma protein (pRB), like p53, serves as a(n) ________ in regulating the cell cycle.
◦ oncogene
◦ pseudooncogene
◦ up regulator
◦ tumor suppressor
◦ tumor enhancer
Question 2
Mutant versions of genes that are normally involved in promoting the cell cycle are known as ________.
◦ attenuators
◦ tumor suppressors
◦ proto-oncogenes
◦ malignant genes
◦ oncogenes