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  • The Cell Cycle and Cellular Reproduction

Biology

Sylvia S. Mader, Michael Windelspecht

Chapter 9

The Cell Cycle and Cellular Reproduction - all with Video Answers

Educators

+ 4 more educators

Chapter Questions

01:55

Problem 1

For questions 1–4, match each stage of the cell cycle to its correct description.
Key:
$\begin{array}{ll}{\text { a. } G_{1} \text { stage }} & {\text { b. S stage }} \\ {\text { c. } G_{2} \text { stage }} & {\text { d. } M(\text { mitotic }) \text { stage }}\end{array}$

At the end of this stage, each chromosome consists of two attached chromatids.

Eric Tran
Eric Tran
Numerade Educator
01:57

Problem 2

For questions , match each stage of the cell cycle to its correct description.
Key:
$\begin{array}{ll}{\text { a. } G_{1} \text { stage }} & {\text { b. S stage }} \\ {\text { c. } G_{2} \text { stage }} & {\text { d. } M(\text { mitotic }) \text { stage }}\end{array}$

During this stage, daughter chromosomes are distributed to two daughter nuclei.

Nalvi Duro
Nalvi Duro
Numerade Educator
00:41

Problem 3

For questions , match each stage of the cell cycle to its correct description.
Key:
$\begin{array}{ll}{\text { a. } G_{1} \text { stage }} & {\text { b. S stage }} \\ {\text { c. } G_{2} \text { stage }} & {\text { d. } M(\text { mitotic }) \text { stage }}\end{array}$

The cell doubles its organelles and accumulates the materials needed for DNA synthesis.

JA
Jamelia Abrams
Numerade Educator
02:29

Problem 4

For questions , match each stage of the cell cycle to its correct description.
Key:
$\begin{array}{ll}{\text { a. } G_{1} \text { stage }} & {\text { b. S stage }} \\ {\text { c. } G_{2} \text { stage }} & {\text { d. } M(\text { mitotic }) \text { stage }}\end{array}$

The cell synthesizes the proteins needed for cell division.

Nalvi Duro
Nalvi Duro
Numerade Educator
01:49

Problem 5

Which is not true of the cell cycle?

a. The cell cycle is controlled by internal/external signals.
b. Cyclin is a signaling molcule that increases and decreases as the cycle continues.
c. DNA damage can stop the cell cycle at the G1 checkpoint.
d. Apoptosis occurs frequently during the cell cycle.

Alexander Cheng
Alexander Cheng
Numerade Educator
04:56

Problem 6

The diploid number of chromosomes

a. is the 2n number.
b. is in a parent cell and therefore in the two daughter cells following mitosis.
c. varies according to the particular organism.
d. is present in most somatic cells.
e. All of these are correct.

Nalvi Duro
Nalvi Duro
Numerade Educator
02:06

Problem 7

The form of DNA that contains genes that are actively being transcribed is called

a. histones.
b. telomeres.
c. heterochromatin.
d. euchromatin.

Alyssa Mcalarney
Alyssa Mcalarney
Numerade Educator
04:00

Problem 8

Histones are involved in

a. regulating the checkpoints of the cell cycle.
b. lengthening the ends of the telomeres.
c. compacting the DNA molecule.
d. cytokinesis.

Nalvi Duro
Nalvi Duro
Numerade Educator
02:12

Problem 9

At the metaphase plate during metaphase of mitosis, there are

a. single chromosomes.
b. duplicated chromosomes.
c. G1 stage chromosomes.
d. always 23 chromosomes

Bryan Lynn
Bryan Lynn
Numerade Educator
03:13

Problem 10

During which mitotic phases are duplicated chromosomes present?

a. all but telophase
b. prophase and anaphase
c. all but anaphase and telophase
d. only during metaphase at the metaphase plate
e. Both a and b are correct.

Nalvi Duro
Nalvi Duro
Numerade Educator
00:11

Problem 11

Which of these is paired incorrectly?

a. prometaphase - the kinetochores become attached to spindle fibers
b. anaphase- daughter chromosomes migrate toward spindle poles
c. prophase - the nucleolus disappears and the nuclear envelope disintegrates
d. metaphase - the chromosomes are aligned in the metaphase plate
e. telophase - a resting phase between cell division cycles

KA
Kemi Alabi
Numerade Educator
05:38

Problem 12

Which of the following is not characteristic of cancer cells?

a. Cancer cells often undergo angiogenesis.
b. Cancer cells tend to be nonspecialized.
c. Cancer cells undergo apoptosis.
d. Cancer cells often have abnormal nuclei.
e. Cancer cells can metastasize.

Nalvi Duro
Nalvi Duro
Numerade Educator
02:35

Problem 13

Which of the following statements is true?

a. Proto-oncogenes cause a loss of control of the cell cycle.
b. The products of oncogenes may inhibit the cell cycle.
c. Tumor suppressor gene products inhibit the cell cycle.
d. A mutation in a tumor suppressor gene may inhibit the cell cycle.

Bryan Lynn
Bryan Lynn
Numerade Educator
03:06

Problem 14

In contrast to a eukaryotic chromosome, a prokaryotic chromosome

a. is shorter and fatter.
b. has a single loop of DNA.
c. never replicates.
d. contains many histones.
e. All of these are correct.

Nalvi Duro
Nalvi Duro
Numerade Educator
03:50

Problem 15

Which of the following is the term used to describe asexual reproduction in a single-celled organism?

a. cytokinesis
b. mitosis
c. binary fission
d. All of these are correct.

Bryan Lynn
Bryan Lynn
Numerade Educator

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