Cell Cycle Review

The model shows stem cells and the many different types of cells they may become.

Which statement describes the stem cells and how they become new types of cells?

• They are embryonic stem cells that differentiate based on the expression of specific genes and the influence of external chemical signals.

• They are adult stem cells that replicate based on the expression of specific genes and the influence of external chemical signals

• They are embryonic stem cells that differentiate into cell types similar to their tissue of origin when their DNA mutates

• They are adult stem cells that replicate into cell types similar to their tissue of origin when their DNA mutates

Determine the order of stages based on the events given.

A student notes some events of the cell cycle in a list.

1) the nuclear envelope distinegrates

2) DNA is duplicated

3) The cell grows larger and makes more proteins

4) DNA condenses to form chromosomes

• Growth 1, mitosis, synthesis, mitosis

• Growth 1 synthesis, mitosis, mitosis

• Mitosis, synthesis, growth 1, mitosis

• Mitosis, growth 1, mitosis, synthesis

• Bacterial cell

• Leaf cell

• Liver cell

• Skin cells

Select the response that best completes the sentence.

A teacher showed slides of different stages of mitosis to four students and asked them to describe the stage viewed under the microscope. Which student correctly describes the stage?

• Student 1

• Student 2

• Student 3

• Student 4

• point W

• point X

• point Y

• point Z

Which stage of mitosis did the student observe?

• anaphase

• metaphase

• prophase

• telophase

Using the data in the graph, when is DNA sythesized?

• immediately before mitosis begins

• immediately after mitosis begins

• in the middle of mitosis

• between the cycles of mitosis

If cells missing the TP53 and cyclin proteins continue through the cycle, what will be the impact on the daughter cells produced at the end of mitosis?

• The cells will be of normal size with stable DNA

• The cells will be too small with stable DNA

• The cell will be of normal size with mutated DNA

• The cells will be too small with mutated DNA

Which checkpoint would detect an error just prior to DNA duplication in the cell cycle?

• W

• X

• Y

• Z

Which statement would be used in an argument against the use of human embryonic stem cells for therapy?

• Obtaining embryonic stem cells for use in therapy requires the destruction of embryos

• Embryonic stem cells are limited in their ability to become different types of cells

• It is difficult to grow embryonic stem cells in laboratory cultures, so they are not a practical choice for stem cell therapy

• Embryonic stem cells originate in plants, so the likelihood of rejection by a patient's body is high