CAMPBELL BIOLOGY TEST BANK MULTIPLE
CHOICE QUESTIONS & ANSWERS
1) Eukaryotic chromosomes are composed of which of the following macromolecules? - ANS-C) DNA and
proteins
2) Starting with a fertilized egg (zygote), a series of six cell divisions would produce an early embryo with
how many cells? - ANS-D) 64
3) In a diploid cell with 5 chromosome pairs (2n = 10), how many centromeres will be found in a nucleus
at G2 of the cell division cycle? - ANS-B) 10
4) Scientists isolate cells in various phases of the cell cycle. They isolate a group of cells that have 1 1/2
times more DNA than G1 phase cells. What is the most likely part of the cell cycle from which these cells
were isolated? - ANS-D) in the S phase of the cell cycle
5) G1 is associated with which of the following cellular events? - ANS-A) normal growth and cell function
6) What is the name of the microtubule-organizing center found in animal cells as an identifiable
structure present during all phases of the cell cycle? - ANS-B) centrosome
7) In the cells of many eukaryotic species, the nuclear envelope has to disappear to permit which of the
following events in the cell cycle? - ANS-B) attachment of microtubules to kinetochores
8) The mitotic spindle plays a critical role in which of the following processes? - ANS-D) separation of
sister chromatids
9) Metaphase is characterized by ________. - ANS-A) alignment of chromosomes on the equator of the
cell
10) In what way do kinetochore microtubules facilitate the process of splitting the centromeres? - ANS-
B) They create tension by pulling toward opposite poles.
11) Certain cell types normally have several nuclei per cell. How could such multinucleated cells be
explained? - ANS-C) The cell underwent repeated mitosis, but cytokinesis did not occur.
12) How is plant cell cytokinesis different from animal cell cytokinesis? - ANS-B) Plant cells deposit
vesicles containing cell wall building blocks on the metaphase plate; animal cells form a cleavage furrow.
, 13) FtsZ is a bacterial cytoskeletal protein that forms a contractile ring involved in binary fission. Its
function is analogous to ________. - ANS-A) the cleavage furrow of eukaryotic animal cells
14) At which phase of the cell cycle do centrioles begin to move apart in animal cells? - ANS-D) prophase
15) In a diploid cell with 5 chromosome pairs (2n = 10), how many sister chromatids will be found in a
nucleus at prophase of mitosis? - ANS-C) 20
16) If there are 40 centromeres in a cell at anaphase of mitosis, how many chromosomes will be found
in each daughter cell following cytokinesis? - ANS-B) 20
17) If a cell at metaphase of mitosis contains 20 sister chromatids, how many chromosomes will be
present in a G1 cell? - ANS-B) 10
18) Taxol is an anticancer drug extracted from the Pacific yew tree. In animal cells, Taxol prevents
microtubule depolymerization. Thus, Taxol stops mitosis by interfering with which of the following
structures or processes? - ANS-A) the mitotic spindle
19) Movement of the chromosomes during anaphase would be most affected by a drug that prevents
which of the following events in mitosis and cell division? - ANS-C) shortening of microtubules
20) Measurements of the amount of DNA per nucleus were taken on a large number of cells from a
growing fungus. The measured DNA levels ranged from 3 to 6 picograms per nucleus. In which stage of
the cell cycle did the nucleus contain 6 picograms of DNA? - ANS-C) G2
21) A group of cells is assayed for DNA content immediately following mitosis and is found to have an
average of 8 picograms of DNA per nucleus. How many picograms of DNA would be found in a nucleus
at prophase of mitosis? - ANS-C) 16
22) The beginning of anaphase is indicated by which of the following processes? - ANS-C) Enzymatic
cleavage of cohesin.
23) During which phase of mitosis do the chromatids become chromosomes? - ANS-B) anaphase
24) A cleavage furrow is ________. - ANS-C) a groove in the plasma membrane between daughter nuclei
25) Use the figure to answer the question below. The unlettered circle at the top of the figure shows a
diploid nucleus with four chromosomes that have not yet replicated. There are two pairs of homologous
chromosomes, one long and the other short. One haploid set is black, and the other is gray. The circles
labeled A to E show various combinations of these chromosomes. What is the correct chromosomal
condition at prometaphase of mitosis? - ANS-A) B
26) Use the figure to answer the question below. The unlettered circle at the top of the figure shows a
diploid nucleus with four chromosomes that have not yet replicated. There are two pairs of homologous
chromosomes, one long and the other short. One haploid set is black, and the other is gray. The circles
labeled A to E show various combinations of these chromosomes. What is the correct chromosomal
condition for one daughter nucleus at telophase of mitosis? - ANS-D) E
CHOICE QUESTIONS & ANSWERS
1) Eukaryotic chromosomes are composed of which of the following macromolecules? - ANS-C) DNA and
proteins
2) Starting with a fertilized egg (zygote), a series of six cell divisions would produce an early embryo with
how many cells? - ANS-D) 64
3) In a diploid cell with 5 chromosome pairs (2n = 10), how many centromeres will be found in a nucleus
at G2 of the cell division cycle? - ANS-B) 10
4) Scientists isolate cells in various phases of the cell cycle. They isolate a group of cells that have 1 1/2
times more DNA than G1 phase cells. What is the most likely part of the cell cycle from which these cells
were isolated? - ANS-D) in the S phase of the cell cycle
5) G1 is associated with which of the following cellular events? - ANS-A) normal growth and cell function
6) What is the name of the microtubule-organizing center found in animal cells as an identifiable
structure present during all phases of the cell cycle? - ANS-B) centrosome
7) In the cells of many eukaryotic species, the nuclear envelope has to disappear to permit which of the
following events in the cell cycle? - ANS-B) attachment of microtubules to kinetochores
8) The mitotic spindle plays a critical role in which of the following processes? - ANS-D) separation of
sister chromatids
9) Metaphase is characterized by ________. - ANS-A) alignment of chromosomes on the equator of the
cell
10) In what way do kinetochore microtubules facilitate the process of splitting the centromeres? - ANS-
B) They create tension by pulling toward opposite poles.
11) Certain cell types normally have several nuclei per cell. How could such multinucleated cells be
explained? - ANS-C) The cell underwent repeated mitosis, but cytokinesis did not occur.
12) How is plant cell cytokinesis different from animal cell cytokinesis? - ANS-B) Plant cells deposit
vesicles containing cell wall building blocks on the metaphase plate; animal cells form a cleavage furrow.
, 13) FtsZ is a bacterial cytoskeletal protein that forms a contractile ring involved in binary fission. Its
function is analogous to ________. - ANS-A) the cleavage furrow of eukaryotic animal cells
14) At which phase of the cell cycle do centrioles begin to move apart in animal cells? - ANS-D) prophase
15) In a diploid cell with 5 chromosome pairs (2n = 10), how many sister chromatids will be found in a
nucleus at prophase of mitosis? - ANS-C) 20
16) If there are 40 centromeres in a cell at anaphase of mitosis, how many chromosomes will be found
in each daughter cell following cytokinesis? - ANS-B) 20
17) If a cell at metaphase of mitosis contains 20 sister chromatids, how many chromosomes will be
present in a G1 cell? - ANS-B) 10
18) Taxol is an anticancer drug extracted from the Pacific yew tree. In animal cells, Taxol prevents
microtubule depolymerization. Thus, Taxol stops mitosis by interfering with which of the following
structures or processes? - ANS-A) the mitotic spindle
19) Movement of the chromosomes during anaphase would be most affected by a drug that prevents
which of the following events in mitosis and cell division? - ANS-C) shortening of microtubules
20) Measurements of the amount of DNA per nucleus were taken on a large number of cells from a
growing fungus. The measured DNA levels ranged from 3 to 6 picograms per nucleus. In which stage of
the cell cycle did the nucleus contain 6 picograms of DNA? - ANS-C) G2
21) A group of cells is assayed for DNA content immediately following mitosis and is found to have an
average of 8 picograms of DNA per nucleus. How many picograms of DNA would be found in a nucleus
at prophase of mitosis? - ANS-C) 16
22) The beginning of anaphase is indicated by which of the following processes? - ANS-C) Enzymatic
cleavage of cohesin.
23) During which phase of mitosis do the chromatids become chromosomes? - ANS-B) anaphase
24) A cleavage furrow is ________. - ANS-C) a groove in the plasma membrane between daughter nuclei
25) Use the figure to answer the question below. The unlettered circle at the top of the figure shows a
diploid nucleus with four chromosomes that have not yet replicated. There are two pairs of homologous
chromosomes, one long and the other short. One haploid set is black, and the other is gray. The circles
labeled A to E show various combinations of these chromosomes. What is the correct chromosomal
condition at prometaphase of mitosis? - ANS-A) B
26) Use the figure to answer the question below. The unlettered circle at the top of the figure shows a
diploid nucleus with four chromosomes that have not yet replicated. There are two pairs of homologous
chromosomes, one long and the other short. One haploid set is black, and the other is gray. The circles
labeled A to E show various combinations of these chromosomes. What is the correct chromosomal
condition for one daughter nucleus at telophase of mitosis? - ANS-D) E
