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A protein on the cell membrane that recognizes and binds to specific substances is called a(n) ___?
Which of the following instruments produces highly magnified three-dimensional images of a cell's surface?
answer: transport proteins
_________ __________ in the cell membrane aid the movement of substances into and out of a cell.
answer: central vacoule
In plant cels, rigidity is provided by a large, membrane-bound sac called the ___ _____.
answer: nucleus pores
______ ______ allow certain substances to pass into and out of the nucleus of a cell.
answer: polar, non-polar
The "head: of a phospholipid is _______, so it is attracted to water, while the "tails" are ________, so they are repelled by water.
If a compound microscope has a 50x objective lens and a 10x ocular lens, a viewed image appears _____ times larger than its actual size.
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