RNAi could be used as an anti-viral treatment by ____
a. inactivating viral genes or key cell proteins involved in viral infection and spread
b. increasing immune system response to the virus
c. binding to receptors on host cells used for viral entry
d. promoting expression of viral DNA-degrading enzymes
e. stimulating host cells to produce anti-viral compounds
ANSWER: a
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How many DNA polymerases are found in prokaryotes?
A. 5 B. 7 C. 9 D. 12
Which amino acid(s) is/are found only in the cell walls of bacteria?
A. Glycerol B. L-form of glycine C. Diaminopimelic acid D. L-form of methionine E. L-form of glycine AND L-form of methionine
Which of the following most directly gives rise to secondary xylem and phloem?
a. protoderm b. apical meristem c. ground meristem d. vascular cambium e. procambium
An essential amino acid is one that the body cannot synthesize in sufficient amounts
__________________Indicate whether the statement is true or false.