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Quiz von Jack Alkema, aktualisiert more than 1 year ago
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Erstellt von Jack Alkema
vor etwa 8 Jahre
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Frage 1
Frage
When cells are grown in a laboratory, which of the following is a factor that can stop normal cells from dividing?
Antworten
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a cut in the skin
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contact with other cells
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growth factors
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injection of cyclin
Frage 2
Frage
In eukaryotic cells, the timing of the cell cycle is regulated by
Antworten
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cyclins
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centrioles
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spindle fibers
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the nuclear envelope
Frage 3
Frage
Cyclins are a family of closely related proteins that
Antworten
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produce p53.
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cause cancer.
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work to heal wounds.
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regulate the cell cycle.
Frage 4
Frage
Which of the following are external regulators of the cell cycle?
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cancer cells
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cyclins
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growth factors
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mitotic spindles
Frage 5
Frage
Cancer is a disorder in which some cells have lost the ability to control their
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surface area
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size
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spindle fibers
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growth rate
Frage 6
Frage
Cancer cells form masses of cells called
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tumors
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cyclins
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growth factors
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p53
Frage 7
Frage
A cell with a defective p53 gene is likely to
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generate hormones that combat tumors.
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stop responding to growth regulators.
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produce cells without a defective p53 gene.
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stop dividing to produce daughter cells.
Frage 8
Frage
During early development, all cells in the embryo of a multicellular organism are identical. Later on in development, the cells will become specialized through a process called
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differentiation
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cytokinesis
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apoptosis
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interphase
Frage 9
Frage
Why are stem cells important?
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They have the potential to undergo cell division.
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They have specialized DNA.
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They have the potential to develop into other cell types.
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They are incapable of becoming cancer cells.
Frage 10
Frage
Which of the following is a possible future benefit of stem cell research?
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increasing a person’s intelligence quotient
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generating embryos from nonliving tissue
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developing a vaccine for cancer
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reversing damage from a heart attack
Frage 11
Frage
Nerve cells are cells that have not yet undergone differentiation.
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- True
- False
Frage 12
Frage
Stem cells taken from embryos are totipotent.
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- True
- False
Frage 13
Frage
During normal development, the cells between toes and fingers die by [blank_start]____________________[blank_end], a process of programmed cell death.
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Apoptosis
Frage 14
Frage
Harvesting [blank_start]____________________[blank_end] stem cells from a willing donor is not as controversial as harvesting techniques that involve the destruction of an embryo.
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adult
Frage 15
Antworten
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A
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B
Frage 16
Frage
Which diagram has a defected p53 gene?
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A
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B
Frage 17
Antworten
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Chemotherapy
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Radiation
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Surgically removing the tumor
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All of the above
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