The Cell Cycle (U3 S1)

Question 1

The synthesis phase, or S phase, is when a cell copies all of its _____.

Accepted Answer

DNA

Question 2

The first growth phase, where a cell grows to full maturity and carries out routine functions, is abbreviated as ____.

Accepted Answer

G1

Question 3

Cytokinesis is the division of the _____________.

Accepted Answer

cytoplasm

Question 4

Other mutations cause cancer by inactivating the proteins that _______ the cell cycle.

Accepted Answer

stop, slow down

Question 5

If a mutation occurs which deregulates the cell cycle, __________ can occur.

Accepted Answer

cancer

Question 6

Which of the following actions does NOT occur during G2, the second growth phase?

Accepted Answer

splitting of cytoplasm

Question 7

The Cell Cycle is a repeating sequence of cellular growth and division during the life of an organism.

Accepted Answer

True

Question 8

At the M checkpoint, the __________ of chromosomes is checked.

Accepted Answer

alignment for division

Question 9

DNA coils up into ____________ before cell division occurs.

Accepted Answer

chromosomes

Question 10

Which of the following is NOT a possible source of the mutations that cause cancer?

Accepted Answer

being in close contact with someone who has cancer

Question 11

A cell spends 90% of its time in the first three phases, collectively called _____________.

Accepted Answer

interphase

Question 12

At the G1 checkpoint, it is determined whether a cell will ________ or not.

Accepted Answer

divide

Question 13

At the G2 checkpoint, the _________ is checked by repair enzymes.

Accepted Answer

DNA

Question 14

Some mutations cause cancer by over-producing growth-promoting molecules, which would __________ the cell cycle.

Accepted Answer

speed up

Question 15

M phase, or mitosis, is the division of the _________.

Accepted Answer

nucleus

Questions 15