(Mastering Biology) The Cell Cycle
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 dos 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
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)
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 complex of DNA and protein that makes up a eukaryotic chromosome is properly...
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 chromatids
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 components
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
Checkpoints in the cell cycle control system...
Regulate the cell cycle through a variety of stop and go signals
Which of the following events does not occur during interphase of the cell cycle?
Separation of the sister chromatids
DNA replication occurs in...
The S phase of interphase in both somatic and reproductive cells
Which of the following structures is/are part of the mitotic spindle?
The aster, kinetochore microtubules, centrosome, non-kinetochore microtubules.
One event occurring during prophase is...
The beginning of the formation of a spindle apparatus
Which event or events occur during anaphase?
The centrosomes divide, identical chromatids more to the opposite poles, the centrioles are at opposite poles, and a spindle made of microtubules is present
Which of the following 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
Which of the following events during pro-metaphase of mitosis?
The nuclear envelope fragments
Which of the following events 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
