Molecular Biology Review

What happens in cytokinesis?

• The chromosomes become visible; nucleus disappears; spindles form

• The chromosomes align in the middle of the cell

• The DNA is duplicated

• The cytoplasm divides into two new daughter cells

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NGSS.HS-LS1-4

What is the purpose of mitosis?

• To increase the surface area of a cell
• To allow cells to divide for growth, repair, and renewal
• For increasing genetic variation within a species
• To allow for DNA replication and protein synthesis

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NGSS.HS-LS1-4

Mitosis results in the formation of...

• Two identical cells with all of the original chromosomes
• Two different cells with half of the original chromosomes
• Four identical cells with all of the original chromosomes
• Four different cells with half of the original chromosomes

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NGSS.HS-LS1-4

Label the phases if the cell cycle.

b

c

d

e

a

S Phase

G2

G1

Interphase

Mitosis

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112.34.c.5.A

Label the images.

d

e

f

c

b

a

Cytokinesis

Prophase

Metaphase

Interphase

Anaphase

Telophase

Tags

112.34.c.5.A

Reorder the following phases of the cell cycle. (Cytokinesis is missing).

• 
• 
• 
• 
• 

Tags

112.34.c.5.A

In S stage, during ​ (a)   , amount of ​ (b)   is doubled to be later divided ​ (c)   into two daughter cells.

• DNA replication
• genetic material
• equally
• unequally
• genetic information
• protein synthesis

The chemical colchicine is used in the production of karyotypes. Colchicine prevents spindle fibers from forming during the cell cycle. What is a result of preventing spindle fibers from forming?

• The cell cycle skips G₀ phase and repeats G₁ phase.

• Mitotic division is skipped, and the cell cycle proceeds to cytokinesis.

• Mitotic division stops in metaphase and cannot proceed to anaphase.

• The cell cycle skips S phase and proceeds to G₂ phase.

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NGSS.HS-LS1-4

Which sequence of DNA bases would pair with this partial strand
ATG TGA CAG

• ATG TGA CAG
• TAC ACT GTC
• GTA AGT GAC
• CAT TCA CTG

Meiosis produces daughter cells that are genetically _________ each other.

• identical to

• different from

• superior to

• inferior to

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NGSS.HS-LS3-2