7.1 study guide Flashcards
Which stage of the cell cycle comes first?
G1
What does the stage G2 do?
The cell continues to grow and prepares for divison.
Which stage comes last in the cell cycle?
Mitosis
What is apoptosis?
Program cell death
What is the first step in cell regulation?
Growth factors are released.
What is an example of a tumor-suppressor gene?
p53
How do p53 and D1 differ in how they affect the cell cycle?
p53 inhibits the cell and D1 stimulates the cell.
Why do mutations in oncogenes and tumor suppressor genes lead to cancer?
The cell will stop growing and lead to cells multiplying out of control.
How often does DNA polymerase make mistakes in DNA replication?
Every 9 billion base pairs.
What’s the proofreading system?
An enzyme reads the DNA, sees it, and fix’s the errors.
