Chapter 12 The cell cycle

Phases of the cell cycle

a. non-dividing cells exit cell cycle. b. at this point, cells commits to go through the cell cycle. c. DNA replicates. d.centrosome replicates. e. miotic spindle begins to form. f. cell divides, forming 2 daughter cells.

Mechanisms underlying the events of mitosis

prophase: * cohesins join sister chromatids of duplicated chromosome. *tubulins assemble into spindle microtubules. Prometaphase: * microtubules attach to kinetochores. Metaphase: *kinetochores are motionlessin relation to poles of cell. Anaphase: * cohesins break down. *kinetochores move toward poles of cell. Telophase: * spindle microtubules dissemble.

The mitotic spindle

1. During prophase, microtubules of the miotic spindle lenghten. 2. During anaphase, the nonkinetochore microtubules lengthen and move fast past each other,and the kinetochore microtubules shorten. 3. During telophase, the nonkinetochore microtubules disassemble

Roles of the mitotic spindle

1. Will this cell elongate during mitosis? (yes) 2. Will the sister chromatids separate from each other? (yes) 3. Will the chromosomes move to the poles of the cell? (no)

Comparing chromosome separation in bacteria and eukaryotes

bacteria only: *Chromosome separation begins at the origin of replication on DNA. Eukaryotes only: * Before separation, duplicated chromosomes condense. * Nuclear envelope fragments, permitting chromosome separation. * 2 copies of the duplicated chromosome are attached at their centromeres before separation. Both Bacteria and Eukariotes: * Chromosomes replicate before cell division. * Replicated chromosomes separate by attaching to some other structural feature of the cell.

Cytokinesis in plant cells: Which of the following statements are true of cytokinesis in plant cells? Select the two that apply

*Vesicles from the Golgi apparatus move along microtubules, coalesce at the plane of cell division, and form a cell plate. *The cell plate consists of the plasma membrane and cell wall that will eventually separate the two daughter cells.

Cells divide by constriction of a ring of protein

bacteria: TRUE animals: TRUE plants: FALSE

The presence of a cell wall prevents the cell from dividing by constriction

bacteria: FALSE animals: FALSE plants: TRUE

Tubulin or tubulin-like molecules function in binary fission (in bacteria) or cytokinesis (in animals and plants).

bacteria: TRUE animals: FALSE plants: TRUE

Chapter 12 The cell cycle - Subjecto.com

Chapter 12 The cell cycle

Your page rank:

Total word count: 336
Pages: 1

Calculate the Price

- -
275 words
Looking for Expert Opinion?
Let us have a look at your work and suggest how to improve it!
Get a Consultant

Phases of the cell cycle

a. non-dividing cells exit cell cycle. b. at this point, cells commits to go through the cell cycle. c. DNA replicates. d.centrosome replicates. e. miotic spindle begins to form. f. cell divides, forming 2 daughter cells.

Mechanisms underlying the events of mitosis

prophase: * cohesins join sister chromatids of duplicated chromosome. *tubulins assemble into spindle microtubules. Prometaphase: * microtubules attach to kinetochores. Metaphase: *kinetochores are motionlessin relation to poles of cell. Anaphase: * cohesins break down. *kinetochores move toward poles of cell. Telophase: * spindle microtubules dissemble.

The mitotic spindle

1. During prophase, microtubules of the miotic spindle lenghten. 2. During anaphase, the nonkinetochore microtubules lengthen and move fast past each other,and the kinetochore microtubules shorten. 3. During telophase, the nonkinetochore microtubules disassemble

Roles of the mitotic spindle

1. Will this cell elongate during mitosis? (yes) 2. Will the sister chromatids separate from each other? (yes) 3. Will the chromosomes move to the poles of the cell? (no)

Comparing chromosome separation in bacteria and eukaryotes

bacteria only: *Chromosome separation begins at the origin of replication on DNA. Eukaryotes only: * Before separation, duplicated chromosomes condense. * Nuclear envelope fragments, permitting chromosome separation. * 2 copies of the duplicated chromosome are attached at their centromeres before separation. Both Bacteria and Eukariotes: * Chromosomes replicate before cell division. * Replicated chromosomes separate by attaching to some other structural feature of the cell.

Cytokinesis in plant cells: Which of the following statements are true of cytokinesis in plant cells? Select the two that apply

*Vesicles from the Golgi apparatus move along microtubules, coalesce at the plane of cell division, and form a cell plate. *The cell plate consists of the plasma membrane and cell wall that will eventually separate the two daughter cells.

Cells divide by constriction of a ring of protein

bacteria: TRUE animals: TRUE plants: FALSE

The presence of a cell wall prevents the cell from dividing by constriction

bacteria: FALSE animals: FALSE plants: TRUE

Tubulin or tubulin-like molecules function in binary fission (in bacteria) or cytokinesis (in animals and plants).

bacteria: TRUE animals: FALSE plants: TRUE

Share This
Flashcard

More flashcards like this

NCLEX 10000 Integumentary Disorders

When assessing a client with partial-thickness burns over 60% of the body, which finding should the nurse report immediately? a) ...

Read more

NCLEX 300-NEURO

A client with amyotrophic lateral sclerosis (ALS) tells the nurse, "Sometimes I feel so frustrated. I can’t do anything without ...

Read more

NASM Flashcards

Which of the following is the process of getting oxygen from the environment to the tissues of the body? Diffusion ...

Read more

Unfinished tasks keep piling up?

Let us complete them for you. Quickly and professionally.

Check Price

Successful message
sending