BI203 Ch. 23 - Online Quiz (MC)

Question 1

DNA content can be determined using a method of flow cytometry that can determine 2n or 4n states of cells based on cell counting and fluorescent labeling of DNA. Which of the following phases would be identified through flow cytometry as 2n?

Answer 1

G1 phase

Question 2

The p21 and p15 proteins are examples of ___ ___.

Answer 2

Cdk inhibitors (CKIs)

Question 3

The G2 cell cycle checkpoint detects ___ or ___ ___.

Answer 3

unreplicated or damaged DNA

Question 4

Cyclin B does ___ cycle between active and inactive states in the cell cycle. (It is either active or DEGRADED entirely).

Answer 4

NOT

Question 5

You perform an experiment by incubating a radiolabeled nucleotide into the medium of a culture of cells. The cells that take up the radiolabel would be expected to be in what phase of the cell cycle?

Answer 5

S phase

Question 6

The spindle assembly checkpoint monitors the alignment of chromosomes in the mitotic spindle during mitosis to insure an even distribution of chromosomes to each of the daughter cells. If the chromosomes do not align properly, the spindle assembly checkpoint will arrest cells in what phase of mitosis?

Answer 6

metaphase

Question 7

In the absence of growth factor, most animal cells will stop the cell cycle at a restriction point in what stage?

Answer 7

G1 phase

Question 8

In which of the following cell types do G1 and G2 not take place?

Answer 8

Early embryonic stem cells

Question 9

Most cells in an adult animal are in the ___ phase.

Answer 9

G0 phase

Question 10

The progression from metaphase to anaphase is triggered by ___ ___ of ___ ___.

Answer 10

ubiquitin-mediated proteolysis of key proteins