HIV inserts its genome into the host cell's DNA
a. True
b. False
ANSWER: True
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Most microbial contaminants of food are killed or inactivated at freezing temperatures.
Answer the following statement true (T) or false (F)
What is the process by which nephrons in the kidney remove toxins and other wastes via active transport?
A) filtration B) secretion C) reabsorption D) urination
Which of the following statements concerning transcription in bacteria is FALSE?
A) It occurs in the nucleoid region. B) Sigma factors are parts of RNA polymerase that recognize promoter regions. C) Different RNA polymerases are required for synthesis of mRNA, rRNA, and tRNA. D) Termination is either self-induced or due to the presence of Rho protein. E) There are a variety of sigma factors that affect transcription.
A toxin common to all Gram-negative bacteria is
A) neurotoxin. B) coagulase. C) lipid A. D) hemolysin. E) collagenase.