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