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CH 7 - MULTIPLE CHOICE Choose the one alternative that best...

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MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1)The advantage of light microscopy over electron microscopy is that 1) _______ A)light microscopy allows one to view dynamic processes in living cells. B)light microscopy provides for higher resolving power than electron microscopy. C)light microscopy provides for higher magnification than electron microscopy. D)A and B E)B and C 2)Which of the following types of molecules are the major structural components of the cell membrane? 2) _______ A)nucleic acids and proteins B)phospholipids and proteins C)proteins and cellulose D)phospholipids and cellulose E)glycoproteins and cholesterol 3)Which of the following is true of the mating signal transduction pathway in yeast? 3) _______ 4)From the perspective of the cell receiving the message, the three stages of cell signaling are 4) _______ 5)The process of transduction usually begins 5) _______ 6)A small molecule that specifically binds to another molecule, usually a larger one 6) _______ A)is called a signal transducer. B)seldom is involved in hormonal signaling. C)is called a ligand. D)usually terminates a signal reception. E)is called a polymer.
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7)Up to 60% of all medicines used today exert their effects by influencing what structures in the cell membrane? 7) _______ 8)Testosterone functions inside a cell by 8) _______ A)coordinating a phosphorylation cascade that increases glycogen metabolism. B)becoming a second messenger that inhibits adenylyl cyclase. C)binding with a receptor protein that enters the nucleus and activates specific genes. D)acting as a signal receptor that activates ion-channel proteins. E)acting as a steroid signal receptor that activates ion-channel proteins.
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