HIV is inactivated in the laboratory after a few minutes of sitting at room temperature, but the flu virus is still active after sitting for several hours. What are the practical consequences of these findings?
A) HIV can be transmitted more easily from person to person than the flu virus
B) The flu virus can be transmitted more easily from person to person than HIV
C) This property of HIV makes it more likely to be a pandemic than the flu virus
D) Disinfecting surfaces is more important to reduce the spread of HIV than the flu
B
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For a particular chemical reaction, the enthalpy of the reactants is -400 kJ. The enthalpy of the products is -390 kJ. The entropy of the reactants is 0.2 kJ/K. The entropy of the products is 0.3 kJ/K. The temperature of the reaction is 25 degrees Celsius. What can you conclude about this reaction?
A. it is a redox reaction B. It is being catalyzed by an enzyme C. It is endergonic D. It is exergonic
What charge does the bacterial cell wall have? What charge do the various stains we used have?
What will be an ideal response?
Part of a DNA template of sequence GTTAGTCTGTGGGCT corresponds to the amino acid sequence
A) GTTAGTCTGTGGGCT. B) CAAUCAGACACCCGA. C) gln-ser-asp-thr-arg. D) val-ser-leu-trp-ala.
The radioactive decay of 14C produces
a. carbon 12. b. carbon 13. c. more carbon 14. d. nitrogen 14. e. oxygen 14.