Question 1

Which of the following best describes the product of mitosis in a typical eukaryotic somatic cell?

Accepted Answer

Two genetically identical daughter cells, each with the same chromosome number as the parent cell

Question 2

During which phase of the cell cycle is DNA replicated?

Accepted Answer

S phase

Question 3

What is the role of cyclin-dependent kinases (Cdks) in the cell cycle?

Accepted Answer

They must bind to cyclins to become active and regulate progression through cell cycle checkpoints

Question 4

Which checkpoint is considered the most important for determining whether a cell will divide?

Accepted Answer

G$$_1$$ checkpoint

Question 5

A researcher observes a cell with condensed chromosomes aligned at the center of the cell, but not yet separated. Which stage of mitosis is this cell in?

Accepted Answer

Metaphase

Question 6

Which of the following statements about binary fission in bacteria is correct?

Accepted Answer

Binary fission results in two genetically identical daughter cells

Question 7

Cancer cells differ from normal cells in that they:

Accepted Answer

Do not stop dividing when growth factors are depleted

Question 8

Which of the following is a function of cell division in multicellular organisms?

Accepted Answer

Embryonic development, renewal, and repair

Question 9

What is the correct sequence of events in the eukaryotic cell cycle?

Accepted Answer

G$$_1$$ → S → G$$_2$$ → M

Question 10

A cell is observed to have a cleavage furrow forming. What process is occurring?

Accepted Answer

Cytokinesis in an animal cell

Question 11

Which of the following best explains why most animal cells exhibit anchorage dependence?

Accepted Answer

They must be attached to a substratum to divide

Question 12

If a cell does not receive a go-ahead signal at the G$$_1$$ checkpoint, what is most likely to happen?

Accepted Answer

The cell will enter a nondividing state called G$$_0$$

Question 13

Which of the following is true regarding the chromosomal organization in eukaryotic cells?

Accepted Answer

Gametes have half as many chromosomes as somatic cells

Question 14

A scientist adds platelet-derived growth factor (PDGF) to a culture of fibroblasts. What is the expected result?

Accepted Answer

The fibroblasts will begin to divide

Question 15

Which of the following events occurs during anaphase of mitosis?

Accepted Answer

Sister chromatids are separated and move to opposite poles

Question 16

Which molecular complex triggers a cell’s passage past the G$$_2$$ checkpoint into M phase?

Accepted Answer

Cyclin-Cdk complex called MPF

Question 17

A malignant tumor is characterized by which of the following?

Accepted Answer

Cells that invade surrounding tissues and can metastasize

Question 18

Which of the following best describes the role of the mitotic spindle during mitosis?

Accepted Answer

It controls chromosome movement and separation

Question 19

A cell with a mutation that prevents the formation of cohesins would most likely have trouble with which process?

Accepted Answer

Holding sister chromatids together after DNA replication

Question 20

Which of the following is a real-world consequence of loss of cell cycle control?

Accepted Answer

Formation of benign or malignant tumors

The Cell Cycle: Mechanisms and Regulation

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