Which of the following is recommended for preventing the spread of tuberculosis from a hospitalized patient to others in the hospital environment?
A. Patient is placed in a negative pressure room.
B. Heath care providers and visitors wear respirator when entering infected patient's room.
C. Infected patient wears a mask when others are in the room.
D. Misting the room with disinfectant.
E. Respirators worn by individuals entering the room and placement of a patient in a negative pressure room.
Answer: E
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The terms helical, icosahedral, and complex refer to
A. viral life cycles. B. forms of nucleic acid. C. types of viral envelopes. D. shapes of viruses.
What will occur most immediately after the process shown in the diagram?
a. Phosphofructokinase reactions will be inhibited.
b. Glucose-6-phosphate levels will decrease.
c. Glucose-6-phosphate levels will increase.
d. Phosphofructokinase reactions will increase.
How many bases make up an mRNA codon?
a. 1 b. 2 c. 3 d. 4
What was likely the first informational molecule of life?
A. carbohydrates B. lipids C. proteins D. RNA E. DNA