Unit 7A Pt1 Test Review

​Unit 7 Test Review Pt1 - 7.2-.5

​Standards

HS-LS1-4: Use a model to illustrate the role of cellular division (mitosis) and differentiation in producing and maintaining complex organisms.

​Interphase - longest phase of cell cycle

G1 - replicate organelles

S - replicate DNA, chromatids form

G2 - ​prepares to divide

PMAT - Mitotic Phase/Nuclear Division

Cytokinesis​

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​Cell Cycle - Interphase & Mitosis

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​Interphase - longest phase of cell cycle

G1 - replicate organelles

S - replicate DNA, chromatids form

G2 - ​prepares to divide

PMAT - Mitotic Phase/Nuclear Division

Cytokinesis​

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​Cell Cycle - Interphase & Mitosis

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Prophase - spindle forms & attaches to chromosomes

Metaphase - spindle lines up chromosomes in middle

Anaphase - sister chromatids separate as microtubules shorten

Telophase - daughter cells form

Cytokinesis​ - cytoplasm separates

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​Mitosis - Nuclear Division

Multiple Choice

What is the importance of microtubules in cell division?

• They provide a pathway for organelles to move into the newly formed cell.

• They organize and pull the chromosomes apart.

• They start the process of cytokinesis.

• They reform the nucleus in the divided cell.

Multiple Choice

What is shown in the figure?

• The figure shows stem cell differentiation.

• The figure shows the steps involved in DNA replication.

• The figure shows structures in a cell.

• The figure shows where mitosis occurs in the cell cycle.

Multiple Choice

Use the image of a group of cells to answer the question. Based on your observations, how many cells are in anaphase?

• 10

• 14

• 19

• 41

​Mitosis

​Body cells replicate DNA

Parent cell is diploid and has 2 sets of chromosomes

(di = two; ploid = chromosome sets)

Two, diploid, genetically identical daughter cells result​

Multiple Choice

Use the image to answer the question. Which type of cell is shown in the figure?

• triploid cell

• diploid cell

• haploid cell

• polyploid cell

Multiple Choice

Define mitosis:

• takes one cell and replicates it into two genetically unique cells.

• takes one cell and replicates it into two genetically identical cells.

• takes one cell and replicates it into four cells, each with half of the original cell's genetic information.

• takes two cells, one form each parent, and replicates it into four genetically unique cells.

Multiple Choice

During mitosis, what happens to the parent cell?

• It produces 3 daughter cells.

• It produces 2 daughter cells.

• It produces 4 daughter cells.

• It produces 1 daughter cell.

Totipotent cells: 1st type of stem cells that form in the embryo

Pluripotent cells: 2nd type of stem cell to form in the embryo

Multipotent cells:​ Adult stem cells that can become many different types of specialized cells within a tissue or organ

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​What is the difference?

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Multiple Choice

Immediately after an embryo forms, it begins to replicate new cells. What is the most likely type of cells that form during the first few divisions?

• totipotent cells

• oligopotent cells

• multipotent cells

• pluripotent cells