Biology Chapter 12
A cell contains 40 chromatids at the beginning of mitosis. How many chromosomes will it contain at the completion of cytokinesis?
20
How many chromatids does a human somatic cell contain after interphase and just prior to mitosis?
92
The region of a chromosome holding the two double strands of replicated DNA together is called...
A centromere.
Which event or events occur during anaphase?
All of the listed responses are correct.
Which of the following structures is/are part of the mitotic spindle?
All of the listed responses are correct.
The function of the mitotic cell cycle is to produce daughter cells that...
Are genetically identical to the parent cell (assuming no mutation has occurred)
Which of the following statements correctly describes the difference(s) between mitosis and binary fission?
Binary fission involves the replication and division of a single chromosome, whereas mitosis involved the division of multiple, replicated chromosomes.
The complex of DNA and protein that makes up a eukaryotic chromosome is properly called....
Chromatin
In animal cell mitosis, the cleavage furrow forms during which stage of the cell cycle?
Cytokinesis.
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.
Chromatids are....
Identical copies of each other if they are part of the same chromosome.
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.
The spread of cancer cells to other locations in the body is known as...
Metastasis
Checkpoints in the cell cycle control system....
Regulate the cell cycle through a variety of stop and go signals.
Which event does not occur during interphase of the cell cycle?
Separation of the sister chromatids.
Which phase of mitosis is essentially the opposite of prometaphase in terms of the nuclear envelope?
Telophase
A cell biologist examined the DNA content of a cell from a fruit fly larva during the G1 phase and determined that it had 150 units of DNA. After measuring the DNA content of the same type of cell after the G2 phase, it was discovered that the cell had 300 units of DNA. How is this possible?
The DNA was replicated during the S phase of interphase, which occurs between the two G phases.
DNA duplication occurs in.....
The S phase of interphase in both somatic and reproductive cells
One event occurring during prophase is....
The beginning of the formation of a spindle Apparatus.
Which of the following statements describes a cell that undergoes mitosis but not cytokinesis?
The cell contains more than one nucleus.
Which of the following events occurs during metaphase of mitosis?
The chromosomes align along the metaphase plate of the cell.
Which of the following events does not occur during prophase of mitosis?
The mitotic spindle breaks down.
How does the process of mitosis differ between most eukaryotes and other eukaryotes such as diatoms and dinoflagellates?
The nuclear envelope fragments in most eukaryotes but remains intact in diatoms and dinoflagellates.
Which of the following events occurs during prometaphase of mitosis?
The nuclear envelope fragments.
During binary fission in a bacterium....
The origins of replication move apart.
Which event occurs during anaphase of mitosis?
The sister chromatids are pulled apart toward opposite sides of the cell.
Which of the following events occurs during telophase of mitosis?
Two distinct daughter nuclei form in the cell.
