The chemical linkages that exert an attractive force over the greatest distance are ____
a. polar covalent bonds
b. van der Waals forces
c. ionic bonds
d. hydrogen bonds
e. nonpolar covalent bonds
ANSWER: c
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The explanation for the differences between a
human liver cell and a cell from the skin is the a. maternal and paternal origins of the genes. b. gene content of the two cells. c. expression of the genes in the two cells. d. fact that they originated from different primary tissue layers. e. different functions of the cells.
When a rod-shaped bacteria is short and plump, it is called a
A. vibrio. B. coccobacillus. C. pleomorphism. D. spirillum. E. spirochete.
Water-soluble vitamins differ from fat-soluble vitamins in that water-soluble vitamins are:
A) less readily absorbed from the GI tract B) stored in fat tissue C) stored for a brief period of time D) rarely required as daily supplements to the diet E) not excreted in urine
________ occurs in the nucleus, where the DNA is located, whereas most ________ occurs in the cytoplasm.
Fill in the blank(s) with the appropriate word(s).