Question 1

During which phase of mitosis do sister chromatids separate and move toward opposite poles of the cell?

Accepted Answer

Anaphase

Question 2

How many chromosomes are present in the middle cell shown in the diagram, assuming the cell is in the G2 phase?

Accepted Answer

2

Question 3

A chromosome begins M phase looking as shown in the image (with two sister chromatids joined at the centromere). During which phase does this chromosome split into two daughter chromosomes?

Accepted Answer

Anaphase

Question 4

A new cell is found and separation of its chromosomes is examined. If the darker patches in the yellow lines are places where the spindle was bleached with a laser, what do these images tell us?

Accepted Answer

Chromosomes shorten at the centrosome end.

Question 5

From prophase through metaphase of mitosis, each chromosome has how many DNA molecules? From anaphase through telophase, each chromosome has how many DNA molecules?

Accepted Answer

Two; one

Question 6

Which of the following is most likely to occur third in an animal cell that is going through mitosis?

Accepted Answer

The number of chromosomes in the cell doubles as double-chromatid chromosomes are split into pairs of single-chromatid chromosomes.

Question 7

Which statement comparing cancer cells and normal somatic cells would lose points on a test?

Accepted Answer

Cancer cells have more effective DNA repair activities.

Question 8

If you were given a slide and told that the cells on it were performing cytokinesis, how would you tell if you had plant cells or animal cells?

Accepted Answer

Look for a cell plate or a cleavage furrow.

Question 9

Binary fission is more like animal cell division than plant cell division because:

Accepted Answer

Bacteria and animals both pinch in to separate the cytoplasm into two pieces.

Question 10

Which of the following best describes the role of microtubules during mitosis?

Accepted Answer

They attach to chromosomes at the centromere and help separate sister chromatids.

Question 11

A researcher observes a cell with chromosomes aligned at the center of the cell. Which phase is the cell most likely in?

Accepted Answer

Metaphase

Question 12

Which checkpoint in the cell cycle is most critical for preventing the division of cells with damaged DNA?

Accepted Answer

G1 checkpoint

Question 13

If a cell fails to form a spindle apparatus during mitosis, what is the most likely consequence?

Accepted Answer

The chromosomes will not be properly separated into daughter cells.

Question 14

Which of the following best explains why cancer cells can form tumors?

Accepted Answer

They ignore signals that regulate the cell cycle.

Question 15

Which of the following events occurs during telophase of mitosis?

Accepted Answer

Nuclear envelopes reform around the chromosomes.

Study Guide: The Cell Cycle (General Biology - Chapter 12)

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