Biology Chapter 10

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If the surface area of a cell that is shaped like a cube increases 100 times, its volume increases about
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1000 times
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Which pair includes a phase of the cell cycle and a cellular process that occurs during that phase?
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G2 phase, preparation for mitosis
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When during the cell cycle is a cell’s DNA replicated?
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S phase
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What role does the centriole play in mitosis?
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connect to spindle fibers
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What structure is in the center of the chromosome?
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Centromere
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What is a whole put together chromosome?
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Sister chromatids
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During which phases of mitosis are sister chromatids visible?
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Prophase, metaphase, and anaphase
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One difference between cell division in plant cells and in animal cells is that plant cells have
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a cell plate
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The process by which a cell divides into two daughter cells is called
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cell division
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An advantage of sexual reproduction over asexual reproduction is that sexual reproduction
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provides genetic diversity
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Which of the following is a correct statement about the events of the cell cycle?
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Interphase consists of the G1 S and G2 phase
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The first phase of mitosis is called
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prophase
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During which phase of mitosis do the chromosomes line up along the middle of the dividing cell?
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Metaphase
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Which of the following represents the phases of mitosis in their proper sequence?
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Prophase, metaphase, anaphase, telophase
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What is the role of the spindle fibers during mitosis?
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They help separate the chromosomes
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The two main stages of cell division are called
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mitosis and cytokinesis
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During normal mitotic cell division, a parent cell that has four chromosomes will produce two daughter cells, each containing
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four chromomsomes
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Which of the following explains why normal cells grown in a petri dish tend to stop growing once they have covered the bottom of the dish?
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Contact with other cells stops cell growth
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In eukaryotic cells, the timing of the cell cycle is regulated by
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cyclins
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Cancer cells form masses of cells called
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tumors
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A cell with a defective p53 gene is likely
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stop responding to growth regulators
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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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Why are stem cells improtant
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They have the potential to develop into other cell types
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The rate at which wastes are produced by a cell partially depends on the cell’s
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volume
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Which of the following happens when a cell divides?
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Each daughter cell recieve its own copy of the parent cell’s DNA
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When during the cell cycle are chromosomes visible?
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only during cell division
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During which phase in the cell cycle does mitosis happen?
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M phase
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Which of the following are external regulators of the cell cycle?
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Growth factors
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Which of the following is a possible future benefit of stem cell research?
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reversing damage from a heart attack
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T or F The SMALLER a cell is, the more difficult it is for the cell to move enough nutrients and wastes across its cell membrane to maintain its normal functions.
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False Larger
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T or F During CYTOKINESIS, a cell undergoing cell division finally splits into two daughter cells
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True
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T or F Nerve cells are cells that have NOT YET undergone differentiation
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False already
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T or F most of a cell’s growth takes place in the G2 phase of the cell cycle
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False G1
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T or F IN eukaryotes, the SPINDLE breaks down during prophase and re-forms during telophase.
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False nuclear envelope
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T or F Proteins called CYCLINS help regulate the cell cycle
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True
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T or F Stem cells taken from embryos are TOTIPOTENT
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PLURIPOTENT
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During normal development, the cells between toes and fingers die by ________ a process of programmed cell death
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apoptosis
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The larger a cell becomes, the _____ efficiently it is able to function
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less
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The number of sister chromatids in a human body cell that is entering cell division is ___
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92
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Together, the G1 phase, S phase, and G2 phase are called
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interphase
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A cell that has 5 chromosomes in the G1 phase will have ___ chromatids in the G2 phase
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10

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