Which of the following statements explaining the differences in number and types of peripheral
proteins found on the inner and outer surfaces of cell membranes is correct?
a. The functions of the membrane differ on the inside and outside of the cell.
b. Not all proteins can pass through the membrane and, thus, more accumulate on the inside.
c. Proteins on the outside of the membrane are synthesized at a slower rate than proteins on
the inside of the membrane.
d. Proteins on the outside of membrane are made extracellularly and are unable to penetrate
the phospholipid bilayer and enter the cell.
e. The external peripheral proteins are weakly attached to the membrane and are readily
washed away.
A
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In addition to inhibiting the transpeptidation reaction in cell wall synthesis, penicillins may also destroy bacteria by
A. inhibiting protein synthesis. B. inhibiting DNA replication. C. stimulating proteins to form holes in the plasma membrane. D. None of the choices are correct.
Electrons that are excited to a higher energy level may be transferred to an electron acceptor or may
return to a ground state. If the latter occurs, energy will be released in a process known as: a. photoelectron degradation. b. fluorescence. c. photoelectron hydrolysis. d. porphyrin. e. photoelectron deconfiguration
Put the terms in the correct order from the heart to the body and back to the heart.
A. venules ? arterioles ? capillaries ? veins ? arteries B. veins ? venules ? capillaries ? veins ? arteries C. arteries ? arterioles ? capillaries ? venules ? veins D. arteries ? venules ? veins ? arterioles ? capillaries
Which of the following modes of communication are seen among animals?
a) chemical b) acoustical c) visual d) All of the above are modes of communication seen in animals. e) Only a) and c) are modes of communication seen in animals.