Chapter 9 Pearson Quiz

A cell biologist carefully measured the quantity of DNA in grasshopper cells growing in cell culture. Cells examined during the G2 phase of the cell cycle each contained 200 units of DNA. What would be the amount of DNA at G1 of the cell cycle in a daughter cell of one of these cells?

100 Units

Assume that you are dealing with a species in which the number of chromosomes in each somatic cell is 14. How many sister chromatids are present in the early telophase of mitosis?

0

When not engaged in the processes leading to cell division, how many chromosomes from your mother are present in the nucleus of each of your somatic cells?

23

If a human somatic cell is in metaphase, it has __________ chromatids.

92

Down syndrome is characterized by cells having three copies of chromosome 21. As a somatic cell in an individual with Down syndrome prepares to enter mitosis, how many chromatids would be present in the cell's nucleus?

94

Which of the following represents a mismatch or incorrect description?

Metaphase: the nuclear envelope disappears

Which of the following processes does not occur in dividing bacteria?

Mitosis

You would be unlikely to see which of the following human cells dividing?

Nerve Cell

In a human skin cell that is going through the cell cycle, when do the centrosomes separate?

Prophase

A biochemist measured the amount of DNA in cells growing in the laboratory and found that the quantity of DNA in the cells doubled __________.

between the G1 and G2 phases

During interphase, the genetic material of a typical eukaryotic cell is __________.

dispersed in the nucleus as long strands of chromatin

"Cytokinesis" refers to _____.

division of the cytoplasm

Observations of cancer cells in culture support the hypothesis that cancer cells __________.

do not exhibit density-dependent inhibition

Which of the following does not occur during mitosis?

duplication of chromosomes

Sister chromatids are __________.

identical copies of a chromosome

The complex of DNA and protein that makes up a eukaryotic chromosome is properly called __________.

chromatin

One event occurring during prophase is __________.

the beginning of the formation of a mitotic spindle

What is the difference between a benign tumor and a malignant tumor?

Cells of benign tumors do not metastasize; those of malignant tumors do.

The cleavage furrow forms during which stage of mitosis and cell division of an animal cell?

Cytokinesis

The function of mitosis and cytokinesis is to produce daughter cells that __________.

are genetically identical to the parent cell

Tissue culture experiments with PDGF demonstrate that without this substance __________.

fibroblasts fail to divide

You would know a dividing cell was a plant cell rather than an animal cell if you saw that __________.

it had formed a cell plate

A cell entering mitosis with 32 chromosomes will produce daughter cells with __________.

none of the listed responses is correct

During binary fission of a bacterium, __________.

origins of replication move apart