Mastering Biology CH. 8

Cytokinesis in a plant cell

A cell is treated with a drug that prevents the formation of vesicles. Which of the following processes depends on the formation of vesicles and would therefore be blocked?

92

A human bone marrow cell in the prophase stage of mitosis contains 46 chromosomes. Therefore, there are a total of __________ sister chromatids in this cell.

Cytokinesis

At the end of the mitotic (M) phase, the cytoplasm divides in a process called _________________.

Formed a cell plate

Consider the photograph shown below. You can determine this is a plant cell rather than an animal cell because it has __________.

G1, S, G2, M

Immune system cells enter a resting phase after undergoing mitosis. When activated—for example, by an infection—they can reenter the sequence of events in the cell cycle that leads to cell division. What would be the correct cell cycle sequence of events for these reactivated cells?

Large cells containing many nuclei

In some organisms such as certain fungi and algae, cells undergo mitosis repeatedly without subsequently undergoing cytokinesis. What would be the consequence of this?

The tumors were implanted under the skin.

Prior to this new technique, how were mice given cancerous tumors?

Prophase

The centrosomes move away from each other and the nuclear envelope breaks up during which phase of mitosis?

A decreasing PSA.

Your uncle has prostate cancer. Which of the following indicates improvement in his condition?

It ensures that each daughter cell receives one copy of the chromosome.

During binary fission, each copy of the duplicating chromosome moves to opposite ends of the cell. What does this achieve?

Cancer cells continuously secrete growth factors into the cell culture medium.

In the laboratory, cancer cells fail to show density-dependent inhibition of growth in cell culture. What is one explanation that could account for this?

Prophase

In the telophase of mitosis, the mitotic spindle breaks down and the chromatin uncoils. This is essentially the opposite of what happens in _____.

Telophase

The chromosomes arrive at the poles and nuclear envelopes form during which phase of mitosis?

Metaphase

The chromosomes line up in the center of the cell during which phase of mitosis?

Anaphase

The sister chromatids separate and begin moving toward opposite poles of the cell during which phase of mitosis?

The patient is treated with chemical castration.

You are an oncologist. A patient presents with advanced prostate cancer and you follow standard protocol. What do you do?

The chromosomes must be duplicated.

What must happen before a cell can begin mitosis?

The mitotic spindle would not form

What would be the immediate consequence of destroying a cell's centrosomes?

They can activate and inactivate certain genes

Which of the following is true regarding prostate cancer cells?

Your patient's cancer has become resistant to the standard treatment.

You are an endocrinologist studying new treatments for prostate cancer. You have a patient with an unusually large level of dihydrotestosterone. Which of the following is true?