An appendage that is an extension of the bacterial cell wall and plasma membrane is a(n) ________.
A. pilus
B. prostheca
C. mycelium
D. flagellum
Answer: B
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Which type of mutation converts a nucleotide to an alternative structure with the same composition but a slightly different placement of rare, less stable hydrogen bonds that cause base-pair mismatch?
A) depurination B) deamination C) tautomeric shift D) transition E) transversion
Which of the following phyla is a member of the Radiata?
a. Nemertea b. Porifera c. Rotifera d. Ctenophora e. Echinodermata
Sucrose is considered a disaccharide because:
a. It has three or more simple sugar subunits. b. It has two simple sugar subunits. c. It has ten simple sugar subunits.
You identify a molecule in a pizza that is a polymer; has oxygen, hydrogen, and sulfur atoms; and is hydrophilic. What kind of molecule is it?
A) protein B) carbohydrate C) nucleic acid D) lipid