BSC 1005 CH. 8 questions with verified answers
12. Variation in rates of cell division is regulated by a cell-cycle control
system, which is a group of molecules, mostly proteins, within a cell
that coordinates the events of the cell cycle. This control system
functions through a system of checkpoints. Which assessment occurs at
the G1/S checkpoint?
A) DNA is checked for damage before entering mitosis.
B) DNA is checked for damage before cell division.
C) Correct alignment of chromosomes on the metaphase plate is
checked.
D) Tension in the spindle fibers is evaluated.
E) Daughter cells are checked for replication errors. Ans✓✓✓ B) DNA is
checked for damage before cell division.
13. The eukaryotic cell cycle consists of four phases, in the following
order:
A) S phase (DNA synthesis), mitosis, Gap 1, and Gap 2.
,B) Gap 1, mitosis, Gap 2, and S phase (DNA synthesis).
C) Gap 1, Gap 2, mitosis, and S phase (DNA synthesis).
D) S phase (DNA synthesis), Gap 2, Gap 1, and mitosis.
E) mitosis, Gap 1, S phase (DNA synthesis), and Gap 2. Ans✓✓✓ E)
mitosis, Gap 1, S phase (DNA synthesis), and Gap 2.
24. During which phase of the mitotic cell cycle does assembly of
spindle apparatus occur?
A) prophase
B) anaphase
C) telophase
D) metaphase
E) interphase Ans✓✓✓ A) prophase
,41. Bacteria reproduce asexually, whereas most plants and animals
reproduce sexually. Which is the better method?
A) Asexual reproduction, because there are more bacteria than plants
and animals.
B) Sexual reproduction, because there are more plants and animals
than bacteria.
C) Asexual reproduction, because binary fission is more efficient.
D) Sexual reproduction, because it produces more variation.
E) Neither method is better; each is effective in different environments
for different kinds of organisms. Ans✓✓✓ E) Neither method is better;
each is effective in different environments for different kinds of
organisms.
42. How many sex chromosomes does the normal human male inherit
from his father?
A) 0
B) 1
, C) 2
D) 22
E) 23 Ans✓✓✓ B) 1
48. Hermaphrodites are individuals with functioning male and female
reproductive organs who are capable of
producing both male and female gametes. Which statement about
hermaphrodites is false?
A) Hermaphrodites are common among invertebrates.
B) An XYY human is a hermaphrodite.
C) No human hermaphrodites exist.
D) Some vertebrate hermaphrodites exist.
E) Humans with Klinefelter syndrome are not hermaphrodites
Ans✓✓✓ C) No human hermaphrodites exist.
6. In asexual reproduction, daughter cells inherit their DNA from:
A) a single parent.
B) two separate parents.
12. Variation in rates of cell division is regulated by a cell-cycle control
system, which is a group of molecules, mostly proteins, within a cell
that coordinates the events of the cell cycle. This control system
functions through a system of checkpoints. Which assessment occurs at
the G1/S checkpoint?
A) DNA is checked for damage before entering mitosis.
B) DNA is checked for damage before cell division.
C) Correct alignment of chromosomes on the metaphase plate is
checked.
D) Tension in the spindle fibers is evaluated.
E) Daughter cells are checked for replication errors. Ans✓✓✓ B) DNA is
checked for damage before cell division.
13. The eukaryotic cell cycle consists of four phases, in the following
order:
A) S phase (DNA synthesis), mitosis, Gap 1, and Gap 2.
,B) Gap 1, mitosis, Gap 2, and S phase (DNA synthesis).
C) Gap 1, Gap 2, mitosis, and S phase (DNA synthesis).
D) S phase (DNA synthesis), Gap 2, Gap 1, and mitosis.
E) mitosis, Gap 1, S phase (DNA synthesis), and Gap 2. Ans✓✓✓ E)
mitosis, Gap 1, S phase (DNA synthesis), and Gap 2.
24. During which phase of the mitotic cell cycle does assembly of
spindle apparatus occur?
A) prophase
B) anaphase
C) telophase
D) metaphase
E) interphase Ans✓✓✓ A) prophase
,41. Bacteria reproduce asexually, whereas most plants and animals
reproduce sexually. Which is the better method?
A) Asexual reproduction, because there are more bacteria than plants
and animals.
B) Sexual reproduction, because there are more plants and animals
than bacteria.
C) Asexual reproduction, because binary fission is more efficient.
D) Sexual reproduction, because it produces more variation.
E) Neither method is better; each is effective in different environments
for different kinds of organisms. Ans✓✓✓ E) Neither method is better;
each is effective in different environments for different kinds of
organisms.
42. How many sex chromosomes does the normal human male inherit
from his father?
A) 0
B) 1
, C) 2
D) 22
E) 23 Ans✓✓✓ B) 1
48. Hermaphrodites are individuals with functioning male and female
reproductive organs who are capable of
producing both male and female gametes. Which statement about
hermaphrodites is false?
A) Hermaphrodites are common among invertebrates.
B) An XYY human is a hermaphrodite.
C) No human hermaphrodites exist.
D) Some vertebrate hermaphrodites exist.
E) Humans with Klinefelter syndrome are not hermaphrodites
Ans✓✓✓ C) No human hermaphrodites exist.
6. In asexual reproduction, daughter cells inherit their DNA from:
A) a single parent.
B) two separate parents.
