Which of the following can be used in creating a vaccine?
A) attenuated bacteria
B) inactivated viruses
C) recombinant proteins
D) attenuated bacteria, inactivated viruses, or recombinant proteins
Answer: D
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According to most car mechanics, plain water is the best coolant to use in an engine provided the engine is not being exposed to freezing temperatures. If the car is subject to freezing temperatures then a mixture of water and ethylene glycol (antifreeze) is recommended but it does not cool as efficiently as plain water. Why would ethylene glycol reduce the cooling efficiency of water?
A. Hydrogen bonds in water allow high levels of heat absorption and a large increase in temperature. B. Ethylene glycol raises the freezing point of water. C. Ethylene glycol has a lower heat capacity than water. D. Ethylene glycol has a higher heat capacity than water.
The G + C content of a DNA sample can be estimated from its TM of a DNA.
Answer the following statement true (T) or false (F)
The symbiotic relationship in which the symbiont benefits from the relationship but the host is neither harmed nor benefited is called:
a. mutualism. b. parasitism. c. commensalism. d. competition. e. niche interactivity.
A fragment of DNA with a radioactive label is incubated with DNase in the presence and absence of a protein that acts as a positive regulator of transcription. The samples are then run on a gel and visualized with autoradiography. Which statement describes a possible result and conclusion from such an experiment?
A) The banding pattern on the gel is the same with and without the transcriptional regulator, therefore the protein binds the DNA fragment. B) Some bands on the gel are absent in the sample with the transcriptional regulator, therefore the protein does not bind the DNA fragment. C) Some bands on the gel are absent in the sample with the transcriptional regulator, therefore the protein binds the DNA fragment. D) Some bands on the gel are absent in the sample without the transcriptional regulator, therefore the protein does not bind the DNA fragment.