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Chapter 12 AP Bio
Terms in this set (30)
Centromeres uncouple, sister chromatids are separated, and the two new chromosomes move to opposite poles of the cell.
This is the longest of the mitotic stages
centrioles begin to move apart in animal cells
which number represents DNA synthesis?
G1 is represented by which number(s)?
I and V
Mitosis is represented by which number?
the correct sequence of steps in the M phase of the cell is
Prophase, prometaphase, metaphase, anaphase, telophase, cytokinesis
A group of cells is assayed for DNA content immediately following mitosis and is found to have an average of 8 picograms of DNA per nucleus. Those cells would have ____ picograms at the end of the S phase and ____ picograms at the end of G2.
If the cell, whose nuclear material is shown in the figure below, continues toward completion of mitosis, which of the following events would occur next?
formation of telophase nuclei
The shortest part of the cell cycle
the best conclusion concerning delta is that the cells
are actually in the G0 phase
cytoskeletal elements play important roles in cell division. the mitotic spindle apparatus is made of ___ and pulls sister chromatids apart, whereas the contractile ring is made of ___ and required for the separation of daughter cells at the end of the mitotic phase of the cell cycle.
Microtubules; actin microfilaments
Which of the following is true concerning cancer cells?
When they stop dividing, they do so at random points in the cell cycle; they are not subject to cell cycle controls; and they do not exhibit density-dependent inhibition when growing in culture.
If there are 20 chromatids in a cell at metaphase, how many chromosomes are there in each daughter cell following cytokinesis?
if there are 20 chromatids in a cell, how many centromeres are there?
starting with a fertilized egg (zygote), a series of five cell divisions would produce an early embryo with how many cells?
a particular cell has half as much DNA as some of the other cells in mitotically active tissue. The cell in question is most likely in
which of the following does not occur during mitosis?
replication of the DNA
in some organisms, mitosis occurs without cytokinesis occurring. This will result in
Cells with more than one nucleus
The decline of MPF activity at the end of mitosis is caused by
the degradation of cyclin
The drug cytochalasin B blocks the function of actin. Which of the following aspects of the cell cycle would be most disrupted by cytochalasin B?
Cleavage furrow formation
If a cell has 8 chromosomes at metaphase of mitosis, how many chromosomes will it have during anaphase?
if there are 20 centromeres in a cell at anaphase, how many chromosomes are there in each daughter cell following cytokinesis?
One daughter nucleus at telophase of mitosis
at prometaphase of mitosis
how do the daughter cells at the end of mitosis and cytokinesis compare with their parents cell when it was in G1 of the cell cycle?
the daughter cells have the same number of chromosomes and the same amount of DNA.
Chromosomes become visible during ___ of mitosis.
which of these is not a carcinogen?
all of the above are carcinogens
Nucleoli are present during
Which of the following organisms does not reproduce cells by mitosis and cytokinesis?
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