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Multiple Choice Quiz
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1

The term "simple cell cycle" is a reference to the production of two identical diploid eukaryotic cells.
A)True
B)False
2

Binary fission begins after DNA replication is completed.
A)True
B)False
3

During interphase chromosomes
A)are lined up on the equator.
B)have separated into sister chromatids.
C)are extended and in use.
D)are coiled around a core of histone proteins.
E)are inactive while the cell metabolizes and grows.
4

During the M phase of mitosis
A)DNA is replicated.
B)homologous chromosomes line up on the equator.
C)DNA is uncoiled and is in use.
D)spindle fibers are bound to centromeres.
E)preparation for cell division begins
5

The spindle is a network of protein cables extending from centrioles at each pole of the cell during mitosis.
A)True
B)False
6

Two diploid daughter cells are the result of mitosis.
A)True
B)False
7

The G1 checkpoint is the time when
A)sister chromatids separate and move to opposite poles of the cell.
B)the decision is made to divide, delay or enter a resting stage.
C)cytokinesis begins.
D)cancerous cells begin unchecked division.
E)none of the above
8

The cell cycle of eukaryotes is accessed and controlled by feedback
A)at three checkpoints.
B)provided by specialized cells of the immune system.
C)at the G1 checkpoint. If all is well, mitosis continues unchecked to completion.
D)during the S phase.
E)both b and c
9

p53 is the strain of virus most often responsible for causing cells to become cancerous.
A)True
B)False
10

A disabled G1 check point is associated with many cancers.
A)True
B)False
11

Epidermal growth factor receptors
A)are now produced as a molecular therapy for the treatment of liver cancer.
B)are used by cells to remove the "brake" the cell uses to restrain cell division.
C)are overproduced in over 20% of breast cancers.
D)amplify the signal in cytoplasm telling the cell to divide.
E)regulate the three check points that control cell division.
12

Gametes
A)results from fusion of egg and sperm.
B)another name for fertilization.
C)eggs and sperm.
D)produces four haploid cells.
13

Syngamy
A)results from fusion of egg and sperm.
B)another name for fertilization.
C)eggs and sperm.
D)produces four haploid cells.
14

Meiosis
A)results from fusion of egg and sperm.
B)another name for fertilization.
C)eggs and sperm.
D)produces four haploid cells.
15

A Zygote
A)result from fusion of egg and sperm.
B)is another name for fertilization.
C)is composed of eggs and sperm.
D)produces four haploid cells.
16

Prophase I:
A)chromosomes gather at the two poles of the cell.
B)crossing over occurs.
C)chromosomes align on the central plane.
D)one version of each chromosome moves to a pole of the cell.
17

Metaphase I:
A)chromosomes gather at the two poles of the cell.
B)crossing over occurs.
C)chromosomes align on the central plane.
D)one version of each chromosome moves to a pole of the cell.
18

Anaphase I:
A)chromosomes gather at the two poles of the cell.
B)crossing over occurs.
C)chromosomes align on the central plane.
D)one version of each chromosome moves to a pole of the cell.
19

Telophase I:
A)chromosomes gather at the two poles of the cell.
B)crossing over occurs.
C)chromosomes align on the central plane.
D)one version of each chromosome moves to a pole of the cell.
20

The structure of eukaryotic chromosomes is in part maintained by
A)covalent bonding between the strands of the double helix.
B)ionic bonding between the strands of the double helix.
C)winding the DNA molecule around a core of histone protein.
D)the centromere.
E)microtubules present in the cytoplasm.
21

Sister chromatids are
A)pairs of heterozygous chromosomes.
B)only seen in prokaryotic cells.
C)formed only during meiosis.
D)duplicated DNA held together by a centromere.
E)both a and d
22

DNA binds with histone proteins because
A)the combination of the two creates a positively charged structure.
B)the positively charged histone is attracted to the negatively charged DNA.
C)the combination of the two creates a complex with no net charge.
D)that is the only way that DNA replication can be stimulated.
E)none of the above
23

Human skin cells are
A)dead when mature.
B)haploid.
C)diploid.
D)capable of becoming germ cells.
E)produced by meiosis.
24

While viewing stained onion root tip cells you notice that distinct chromosomes cannot be observed in most of the cells. This is because most of the cells
A)were destroyed while preparing the slide.
B)must be in interphase.
C)are in metaphase.
D)must be undergoing meiosis.
E)are in stasis.
25

The S phase of mitosis involves synthesis of
A)cellular products for export from the cell.
B)cellular membranes and organelles.
C)DNA.
D)the cell wall in plant cells.
E)both a and d
26

The majority of the cell cycle is taken up by
A)interphase.
B)prophase.
C)metaphase.
D)anaphase.
E)telophase.
27

The nuclear envelope reforms in the daughter cells during
A)interphase.
B)prophase.
C)metaphase.
D)anaphase.
E)telophase.
28

The shortest stage of mitosis is
A)interphase.
B)prophase.
C)metaphase.
D)anaphase.
E)telophase.
29

Mutations _____________ are associated with many cancers.
A)preventing the initiation of metaphase
B)disabling key elements of the G1 checkpoint
C)of the cell membrane
D)caused by viral infections
E)both a and c
30

A fertilized egg is called a(n)
A)meiotic cell.
B)gamete.
C)ovum.
D)zygote.
E)gametophyte.
31

Alternation of generations refers to
A)a event that only occurs in plant life cycles.
B)the alternation of a haploid and diploid generation in a life cycle.
C)the lack of chromosome division between meiotic divisions.
D)the dependence of one generation on the next for provision of nutrients.
E)none of the above
32

Crossing over takes place during
A)anaphase of mitosis.
B)telophase of mitosis.
C)meiosis I
D)meiosis II
E)cytokinesis.
33

Genetic variation in a population is ensured by
A)crossing over during meiosis.
B)random fertilization.
C)independent assortment.
D)all of the above
E)only a and c.





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