Which of the following virulence factors used by Staphylococcus puts holes in host cells?
A.
Protein A
B.
Alpha toxin
C.
Leukocidin
D.
Clumping factor
B.
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In the process of bacterial transformation, how are the plasmid-containing bacteria identi?ed?
What will be an ideal response?
Which of the following statements is true?
a. Organs receive either parasympathetic fibers or sympathetic fibers but not both. b. The sympathetic nervous system that supplies an organ will also provide parasympathetic fibers to it. c. Both the sympathetic and parasympathetic have either excitatory or inhibitory effects. d. The sympathetic branch of the sympathetic system usually speeds up the activities of the body. e. All of these are true.
Which of the following is not located in the nucleus?
A) Chromosomes B) Nucleolus C) DNA D) Endoplasmic reticulum
The most important energy-rich phosphate compound in cells is
a. NADH. b. NAD+. c. ATP. d. acetyl-CoA.