Campbell Biology Chapter 12 Test Bank
exam question and answer 100%correct
1) Eukaryotic chromosomes are composed of which of the following macromolecules? -
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? - 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? - 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? - D) in the S phase of the cell cycle
5) G1 is associated with which of the following cellular events? - 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? - 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? - B) attachment of microtubules to
kinetochores
, 8) The mitotic spindle plays a critical role in which of the following processes? - D)
separation of sister chromatids
9) Metaphase is characterized by ________. - A) alignment of chromosomes on the
equator of the cell
10) In what way do kinetochore microtubules facilitate the process of splitting the centromeres?
- 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? - C) The cell underwent repeated mitosis, but cytokinesis did not occur.
12) How is plant cell cytokinesis different from animal cell cytokinesis? - 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 ________. - 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? - 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? - 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? - B) 20
exam question and answer 100%correct
1) Eukaryotic chromosomes are composed of which of the following macromolecules? -
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? - 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? - 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? - D) in the S phase of the cell cycle
5) G1 is associated with which of the following cellular events? - 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? - 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? - B) attachment of microtubules to
kinetochores
, 8) The mitotic spindle plays a critical role in which of the following processes? - D)
separation of sister chromatids
9) Metaphase is characterized by ________. - A) alignment of chromosomes on the
equator of the cell
10) In what way do kinetochore microtubules facilitate the process of splitting the centromeres?
- 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? - C) The cell underwent repeated mitosis, but cytokinesis did not occur.
12) How is plant cell cytokinesis different from animal cell cytokinesis? - 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 ________. - 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? - 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? - 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? - B) 20
