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Bio Reading Quiz Ch 12

Terms in this set (10)

A human bone marrow cell, in prophase of mitosis, contains 46 chromosomes. How many chromatids does it contain? See Concept 12.1 (Page)
92
Why is it difficult to observe individual chromosomes with a light microscope during interphase?
interphase chromosomes are long, thin strands unlike the condensed chromosomes visible in mitosis
Which of the following statements describing kinetochores is correct?
They are sites at which microtubules attach to chromosomes.
Which of the following correctly matches a phase of the cell cycle with its description?
G1, follows cell division
In some organisms, such as certain fungi and algae, cells undergo the cell cycle repeatedly without subsequently undergoing cytokinesis. What would result from this?
large cells containing many nuclei
Which of the following occurs in binary fission but not in mitosis with cytokinesis?
duplicated chromosomes attach to the plasma membrane
Which of the following is true of benign tumors, but not malignant tumors?
they remain confined to their original site
Which of the following statements best explains how neurons and some other specialized cells divide infrequently?
They have entered into G0.
Which of the following events characterizes the beginning of anaphase?
enzymatic cleavage of cohesin
The cell cycle control systems of cancer cells differ from those of normal cells. Select the best explanation for this fact.
Genetic changes alter the function of the cancer cell's protein products.
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