Cell Cycle and Mitosis

what stage of mitosis is pictured?

Anaphase

Which stage of the cell cycle contains the G1, S, and G2 phases?

Interphase

Which of the following is true of interphase?

Interphase is longer than the mitotic phase.

What happens when a positive regulator (proto-oncogene) is overactivated?

It allows uncontrolled cell division to occur.

What stage of mitosis is pictured? (Full line across)

Metaphase

In humans, adult brain cells called neurons are terminally differentiated. This means that they are completely mature and no longer undergo the cell cycle. Which of the following statements best describes how the cell cycle relates to neurons?

Neurons do not go through M phase.

Palbociclib is a cancer drug that targets cells which no longer follow the normal rules and regulations of the cell cycle. Which of the following best describes a possible mechanism for how Palbociclib may function?

Palbociclib blocks the passage through an early cell cycle checkpoint.

What stage of mitosis is pictured? (Two big, two small X's)

Prophase

Which of the following shows the correct sequence of the stages in mitosis (left to right) ?

Prophase→Metaphase→Anaphase→Telophase (PMAT)

What stage of mitosis is pictured? (two bubbles connected w same picture)

Telophase

What is the function of negative regulator (tumor suppressor) genes?

To prevent uncontrolled cell growth

UV radiation can directly cause the DNA within cells to mutate, which may eventually lead to the formation of cancer. Which of the following best describe mechanisms for how UV radiation may lead to cancer?

UV radiation may cause negative regulators (tumor suppressors) to be under-expressed. / UV radiation may cause positive regulators (oncogenic) to be over-expressed.