5A Quiz

Which of the following is the correct statement about the events of the cell cycle?

• Little happens during G1 and G2 phases of the cell cycle.

• DNA replicates during the S phase of interphase.

• Mitosis is usually the longest phase of the cell cycle when the cell is growing.

• Interphase consists of the G1, S, G2 phases, and mitosis.

G1 phase, S phase and G2 phase are all parts of –

• interphase

• anaphase

• prophase

• telophase

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The photo represents 5 stages of the cell cycle.

Identify the stage of mitosis in photo E.

• Interphase

• Telophase

• Anaphase

• Metaphase

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A laboratory assistant was told to watch the mitosis of a eukaryotic cell under the microscope and inform the lead scientist when the cell entered prophase.  What should the assistant expect to look for to indicate that the cell is in prophase?

• The chromosomes gather at opposite ends of the cell and uncoil, and then two new nuclear envelopes form around this genetic material.

• The sister chromatids separate into individual chromosomes and are moved apart.

• The chromosomes line up across the center of the cell, and each chromosome is connected to a spindle fiber.

• The chromatin condenses into chromosomes, the nuclear envelope breaks down, and a spindle begins to form.

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The M phase of the cell cycle consists of both mitosis and cytokinesis.  Mitosis refers to ________________, whereas cytokinesis refers to ________________.

• cell/cytoplasmic division, cell plate formation in animal cells

• cell/cytoplasmic division, nuclear division

• nuclear division, cell/cytoplasmic division

• nuclear division, replication of nuclear material

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Put the following actions in order; DNA replicates, Cell Grows, Cell Divides, Cell prepares for mitosis.

• DNA replicates, cell grows, cell prepares for mitosis, cell divides

• cell grows, cell prepares for mitosis, DNA replicates, cell divides

• cell grows, DNA replicates, cell prepares for mitosis, cell divides

• DNA replicates, cell prepares for mitosis, cell grows, cell divides

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The phase in mitosis where chromosomes move away and are pulled apart by spindles to opposite sides of the cell.

• Prophase

• Metaphase

• Anaphase

• Telophase

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The cell cycle is important to the growth of organisms.  In humans, for example, mitosis begins shortly after the egg is fertilized by the sperm, producing vast number of cells needed for the embryo to take form.  The diagram below represents the stages of human embryo development during the first 23 weeks.

During the process of mitosis, one parent cell divides to create –

• four new genetically different daughter cells.

• two new genetically identical daughter cells.

• three new genetically identical daughter cells.

• two new genetically different daughter cells.

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People who have leukemia, a cancer that affects white blood cells, are often given Cytarabine. This drug inhibits the synthesis or replication of DNA. Which phase of the cell cycle is most affected by Cytarabine?

• G1 phase

• S phase

• G2 phase

• M phase

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Scientists can bioengineer skin in a laboratory to treat severe burns and other types of skin injuries. This Bioengineered tissue is grown from living cells. The cellular process that enables the cells to grow and develop into tissue is –

• Conjugation

• Meiosis

• Budding

• Mitosis

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