bio ch 12
anaphase
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
which event occur during anaphase
all; spindle made of microtubules is present. centromeres divide, centrioles are at opposite poles, identical chromatids move to opposite poles
A cell contains 40 chromatids at the beginning of mitosis. How many chromosomes will it contain at the completion of cytokinesis?
20 HALF
How many chromatids does a human somatic cell contain after interphase and just prior to mitosis?
92
Which of the following structures is/are part of the mitotic spindle?
All; kinetochore microtubules, centrosome, nonkinet, aster
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 involves the division of multiple, replicated chromosomes.
The complex of DNA and protein that makes up a eukaryotic chromosome is properly called __________.
CHROMATIN
difference between benign and malignant
Cells of benign tumors do not metastasize; those of malignant tumors do.
Chromatids are __________.
IDENTICAL COPIES OF EACH OTHER IF THEY ARE PART OF THE SAME CHROMOSOME
Which of the following phases of mitosis is essentially the opposite of prometaphase in terms of the nuclear envelope?
Telophase
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.
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)
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
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
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 of the following events does not occur during interphase of the cell cycle?
separation of the sister chromatids
Which of the following events occurs during prometaphase of mitosis?
th enuclear envelope fragments
DNA replication occurs in
the S phase
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 the metaphase plate of the cell
Which of the following events does not occur during prophase of mitosis?
the mitotic spindle breaks down
During binary fission in a bacterium __________.
the origins of replication move apart
