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Cards In This Set
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Evidence that all living cells have a common origin is provided by
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Basic similarities in cell structure and chemistry.
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It is advantageous for cells to be small because:
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A small cell has a small volume relative to surface area, thereby increasing efficient transport.
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One strategy that allows larger cells to have an effective surface area to volume ratio is
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C. having thin, finger-like projections.
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Which of the following descriptions or structures does NOT match the cell type?
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Smallest cell are egg cells.
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The ratio of the size of the image seen with the microscope to the actual size of the object is called:
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Magnification.
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The scanning electron microscope differs from the transmission electron microscope in that the scanning electron microscope:
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Gives a three dimensional image of the object being studied
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A eukaryotic cell:
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E. has a variety of membranous organelles.
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Membrane-bounded organelles facilitate faster chemical reactions because:
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Reactants move faster within membrane-bounded organelles.
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Which of the following structures or activities is NOT directly part of the endomembrane system?
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D. peroxisomes
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DNA is associated with proteins, forming a complex called:
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E. chromatin.
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Nucleoli contain chromosomal regions that specialize in making:
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RNA.
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A single cell in a smoker's lung has become cancerous. It doubles its DNA and divides much faster than a normal lung cell. The most likely change that would have caused this condition took place in the:
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A. nucleus.
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If a toxin, such as a bacterial toxin, destroys ribosomes, what cellular activity will be affected first?
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Protein synthesis
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The smooth endoplasmic reticulum:
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Synthesizes lipids
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Proteins made on ribosomes may be further modified within the
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Golgi complex
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