During penetration of E. coli by the T4 phage
A. lysozyme is used to allow entry of the phage capsid.
B.
the tail acts as a "hypodermic needle," injecting the phage DNA into the cell.
C. the protein fibers digest a hole in the cell wall.
D. the bacterial receptor molecules open a hole through the cell wall.
B
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Peripheral vascular diseases are disorders of the blood vessels that are located outside of the heart and brain.
Answer the following statement(s) true (T) or false (F)
Fats high in unsaturated fatty acids tend to be solid at room temperature
__________________ Indicate whether the statement is true or false.
Which of the following microscopes uses visible light?
a. Scanning electron microscope b. Confocal microscope c. Scanning acoustic microscope d. DIC e. Fluorescence microscope
Decontaminating and disinfecting surfaces may result in a decreased removal of contaminating organisms when used in combination. This is due to the fact that:
a. agents are all synergistic and should not be of concern in the laboratory. b. agents mixed together may actually inac-tivate each other or create harmful chem-icals resulting in additional hazards. c. agents are antagonistic and will not be as effective. d. agents are already premixed to maximize sterilization.