7212118
Descripción
Test por Jack Alkema, actualizado hace más de 1 año
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Creado por Jack Alkema
hace alrededor de 8 años
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Pregunta 1
Pregunta
When cells are grown in a laboratory, which of the following is a factor that can stop normal cells from dividing?
Respuesta
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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
Pregunta 2
Pregunta
In eukaryotic cells, the timing of the cell cycle is regulated by
Respuesta
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cyclins
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centrioles
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spindle fibers
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the nuclear envelope
Pregunta 3
Pregunta
Cyclins are a family of closely related proteins that
Respuesta
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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.
Pregunta 4
Pregunta
Which of the following are external regulators of the cell cycle?
Respuesta
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cancer cells
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cyclins
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growth factors
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mitotic spindles
Pregunta 5
Pregunta
Cancer is a disorder in which some cells have lost the ability to control their
Respuesta
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surface area
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size
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spindle fibers
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growth rate
Pregunta 6
Pregunta
Cancer cells form masses of cells called
Respuesta
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tumors
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cyclins
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growth factors
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p53
Pregunta 7
Pregunta
A cell with a defective p53 gene is likely to
Respuesta
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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.
Pregunta 8
Pregunta
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
Respuesta
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differentiation
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cytokinesis
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apoptosis
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interphase
Pregunta 9
Pregunta
Why are stem cells important?
Respuesta
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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.
Pregunta 10
Pregunta
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
Pregunta 11
Pregunta
Nerve cells are cells that have not yet undergone differentiation.
Respuesta
- True
- False
Pregunta 12
Pregunta
Stem cells taken from embryos are totipotent.
Respuesta
- True
- False
Pregunta 13
Pregunta
During normal development, the cells between toes and fingers die by [blank_start]____________________[blank_end], a process of programmed cell death.
Respuesta
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Apoptosis
Pregunta 14
Pregunta
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.
Respuesta
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adult
Pregunta 15
Respuesta
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A
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B
Pregunta 16
Pregunta
Which diagram has a defected p53 gene?
Respuesta
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A
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B
Pregunta 17
Pregunta
How can the cancer cells be treated?
Respuesta
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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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