Mastering bio 12 – Flashcards
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Which of the following is true of kinetochores?
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They are sites at which microtubules attach to chromosomes.
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When cells were first taken from Henrietta Lacks, she was _____.
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suffering from cervical cancer
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How did doctors harvest and culture cells from Henrietta Lacks?
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Cells were taken while she was being treated for cancer many years ago, and these cells have been cultured in the lab ever since.
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Did doctors ask Henrietta Lacks' permission to take her cells, and was she paid for them?
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She was never told that her cells were being taken, and neither she nor her family has been compensated.
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What property of Henrietta Lacks' cells was most unusual when they were grown in the laboratory?
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They continue to divide and multiply after decades of culture.
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Cells taken from Henrietta Lacks have been used for experiments leading to _____.
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new treatments for cancer, the development of a polio vaccine, tests of the effects of atomic radiation on life
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A human bone marrow cell, in prophase of mitosis, contains 46 chromosomes. How many chromatids does it contain?
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92
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Nucleoli are present during _____.
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interphase
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Cytokinesis often, but not always, accompanies _____.
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telophase
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Chromosomes become visible during _____.
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prophase
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Centromeres divide and sister chromatids become full-fledged chromosomes during _____.
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anaphase
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Spindle fibers attach to kinetochores during _____.
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prometaphase
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During prophase a homologous pair of chromosomes consists of _____.
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two chromosomes and four chromatids
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During _____ both the contents of the nucleus and the cytoplasm are divided.
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the mitotic phase
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During _____ the cell grows and replicates both its organelles and its chromosomes.
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interphase
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Which of these is NOT a carcinogen?
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cigarette smoke UV light testosterone fat
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_____ is a carcinogen that promotes colon cancer.
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fat
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homo-, homeo-
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same
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auto-
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self
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ploid
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chromosomes
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diplo-
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both, double
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haplo-
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single
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-some, soma-
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body
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-gen-
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to produce
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chrom-
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color
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a-, an-
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without, lack of, not
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micro-
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small
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-mere
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segment, body section
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kin-, kinet-
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moving
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telo-
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end
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pro-
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before
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uni-
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one
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-cyte, cyto-
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cell
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mito-
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thread
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multi-
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many
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inter-
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between
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bi-
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two
