____ epithelial tissue is only one cell layer thick
a. Stratified
b. Dense connective
c. Loose connective
d. Simple
e. Cuboidal
ANSWER: d
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In the DNA of certain bacterial cells, 16% of the nucleotides are adenine. What are the percentages of the other nucleotides in the bacterial DNA?
A. 16% thymidine, 34% guanine, 34% cytosine B. 34% uracil, 16% guanine, 16% cytosine C. 34% thymidine, 34% guanine, 16% cytosine D. 34% thymidine, 16% guanine, 34% cytosine
The glycerol head of a phospholipid can be described as _________, while the fatty acid tails can be described as ________.
a. hydrophobic; hydrophobic b. hydrophilic; hydrophobic c. hydrophilic; hydrophilic d. hydrophobic; hydrophilic
What type of bonding allows the long, straight
chains of cellulose to lock together tightly?
a. hydrogen b. polar covalent c. ionic d. nonpolar covalent e. mettalic
Which of the following carries amino acids to
ribosomes, where amino acids are linked into the primary structure of a polypeptide? a. mRNA b. tRNA c. hnRNA d. rRNA e. all of these