Which of the following types of molecules are the major
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Which of the following types of molecules are the major structural components of the cell membrane and cellulose B) nucl
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Which of the following types of molecules are the major structural components of the cell membrane and cellulose B) nucleic acids and proteins C) phospholipids and proteins D) proteins and cellulose E) glycoproteins and cholesterol 2 The presence of cholesterol in the plasma membranes of some animals A enables the membrane to stay fluid more easily when cell temperature drops. B) enables the animal to remove hydrogen atoms from saturated phospholipids. enables the animal to add hydrogen atoms to unsaturated phospholipids. D) makes the membrane less flexible, allowing it to sustain greater pressure from within the cell. E) makes the animal more susceptible to circulatory disorders. According to the fluid mosaic model of cell membranes, which of the following is a true statement about membrane phospholipids A They can move laterally along the plane of the membrane. B) They frequently flip-flop from one side of the membrane to the other. membrane proteins restricted to the surface of the D) membrane. surrounding solution. They are free to depart from the membrane and dissolve in the 4. The advantage of light microscopy over electron microscopy is that A) light microscopy provides for higher magnification than electron microscopy. B) light microscopy provides for higher resolving power than electron microscopy. in living cells. dynamic processes D) light microscopy provides higher contrast than electron microscopy. E) preparation for light microcopy does not produce artifacts. specimen A primary objective of cell fractionation is to A) view the structure of cell membranes. B sort cells based on their size and weight. C determine the size of various organelles. their particular functions can be determined. major organelles so that D) separate the E) separate lipid-soluble from water-soluble molecules All of the following are part of a prokaryotic cell except A) DNA. B) a cell wall. C) a plasma membrane. D) ribosomes. E) an endoplasmic reticulum.
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