Bio: Chapter 10 questions Flashcards
Binary fission in prokaryotes does not require the
a. replication of DNA.
b. elongation of the cell.
c. separation of daughter cells by septum formation.
d. assembly of the nuclear envelope
assembly of the nuclear envelope
A bacterial cell has a defect in the gene that encodes FtsZ. If
the cell undergoes binary fission, what will be the result?
a. Two daughter cells that are clones of each other
b. One large cell with two chromosomes
c. Two daughter cells, one that has two chromosomes and one
that has no chromosome
d. One large cell that looks genetically like the parent cell
One large cell with two chromosomes
Chromatin is composed of
a, RNA and protein.
b. DNA and protein.
c. sister chromatids.
d. chromosomes
DNA and protein
What is a nucleosome?
a. A region in the cell’s nucleus that contains euchromatin
b. A region of DNA wound around histone proteins
c. A region of a chromosome made up of multiple loops of
chromatin
d. A 30-nm fiber found in chromati
A region of DNA wound around histone proteins
Just prior to cell division, homologous chromosomes
a. are replicated.
b. consist of two sister chromatids.
c. become connected to each other.
d. Both a and b
are replicated
The spotted skunk is 2n = 64. Based on this information, you
know that
a. its haploid number is 64.
b. each of its somatic cells has 64 chromosomes.
c. it has 64 homologous chromosomes.
d. its DNA has just been replicated.
each of its somatic cells has 64 chromosomes
Highly condensed DNA
a. can be easily replicated and expressed.
b. is heterochromatin.
c. is the state of DNA in a nondividing cell.
d. Both a and b
is heterochromatin
A cell receives a signal to divide. Which of the following is the
correct order of steps it takes through the cell cycle?
a. G1, G2, S, M
b. G1, S, G2, interphase, M
c. M, S, G1, G2
d. G1, S, G2, M
G1, S, G2, M
How is the cell cycle (mitosis) similar to binary fission?
a. Both are needed to produce genetically variable offspring.
b. Both occur only in eukaryotes.
c. Both involve DNA wrapped around histones.
d. Both involve replication of DNA and separation of DNA
equally into two daughter cells
Both involve replication of DNA and separation of DNA
equally into two daughter cells
In some fungi, mitosis occurs without cytokinesis. What is the
result?
a. Two small cells with half the amount of DNA as the parent
cell
b. One large cell with the same amount of DNA as the parent
cell
c. One large cell with twice the DNA as the parent cell
d. Two cells with the same amount of DNA as the parent cell
One large cell with twice the DNA as the parent cell
What is the role of cohesin proteins in cell division?
a. They organize the DNA of the chromosomes into highly
condensed structures.
b. They hold the DNA of the sister chromatids together.
c. They help the cell divide into two daughter cells.
d. They connect microtubules and chromosomes.
They hold the DNA of the sister chromatids together
A centromere
a. is a region where sister chromatids are attached prior to
their separation during mitosis.
b. is a microtubule-organizing center.
c. is the site of tubulin synthesis.
d. is required for division in animal cells but not in cells of
other eukaryotes.
is a region where sister chromatids are attached prior to
their separation during mitosis.
The microtubules that grow from an animal centriole attach
a. to the kinetochore.
b. to the centromere.
c. to the DNA bases of each sister chromatid.
d. to the newly duplicated centriole in that cell.
to the kinetochore
In which stage of mitosis do duplicated chromosomes line up
in the center of the cell?
a. Prophase
b. Telophase
c. Anaphase
d. Metaphase
Metaphase
Which of the following occurs during anaphase?
a. Cohesion proteins are made and become concentrated at
the centromere.
b. Sister chromatids are pulled apart when kinetochore
microtubules shorten
c. The cell elongates when polar microtubules shorten.
d. All of the above
Sister chromatids are pulled apart when kinetochore
microtubules shorten
