Homework Answers

Identify which phase of mitosis is described by each of the statements below.
Anaphase
This is the phase when the sister chromatids are detached from one another.
Telophase
This is the phase when a new nuclear membrane begins to form around the divided chromosomes. Metaphase
This is the phase when the chromosomes line up along the center of the cell.
Prophase
This is the phase when DNA condenses into chromosomes. This is the phase when the nuclear membrane begins to break down. \

Which kind(s) of cells store genetic information in plasmids?
Only prokaryotic cells

Which of these images shows a cell in metaphase?

Which of these images shows a cell in prophase?

Which of these is NOT a part of Interphase?
The M phase

The condensed form of DNA that is seen when a cell prepares to divide is called ______? chromosomes

There are multiple checkpoints that a cell must pass through in order to divide.
Which checkpoint "checks" the external environment to determine if there would be enough nutrients available for a new cell to grow?
The $G_1$ checkpoint

A cell that has two copies of each chromosome is considered
diploid

True or false?
Non-cancerous cells must be attached to a growth surface to undergo mitosis.
True

Human sperm cells are an example of a _______ Human sperm cells are ______ cells.
gamete, haploid

Put the phases of a cell's life cycle in order, from "birth" to division. Birth (when a new daughter cell is formed)
$G_1$ phase
$S$ phase
$G_2$ phase
$M$ phase

True or false?
If the cell density is high (a.k.a. cells are tightly squeezed together), cancerous cells will still divide.
True

Which of these is NOT a part of Interphase? The M phase

A cell that has one copy of each chromosome is considered
haploid

______ are pairs of chromosomes, each inherited from a different parent.

There are multiple checkpoints that a cell must pass through in order to divide.
Which checkpoint "checks" for the presence of growth factors in the environment around the cell? The $G_1$ checkpoint

Which kind(s) of cells have pairs of chromosomes?
Only eukaryotic cells

True or false? Without external growth factors, non-cancerous cells will NOT undergo mitosis. True

There are multiple checkpoints that a cell must pass through in order to divide.

Which checkpoint "checks" to see if the chromosomes in a dividing cell accurately attached to the mitotic spindle proteins? The Metaphase checkpoint

Human muscle cells are an example of a ________
somatic cell

Human muscle cells are ______ cells.
diploid

During which phase do cells duplicate their organelles (to prepare for division)?
The $G_2$ phase

Most of the cells in the human body (besides the reproductive cells) are considered
somatic cells

The loose, stringy form of DNA seen in the nucleus of a cell is called
chromatin

Human neurons are an example of a ______.
Human neurons are _____ cells.
gamete, haploid

Which kind(s) of cells use DNA as their genetic information molecule?
Both prokaryotic cells and eukaryotic cells