Which is NOT true concerning neurotransmitters?
a. They are chemicals found in the axon terminals
b. They bind to receptors on the axon terminals
c. They are removed from the synaptic cleft by reuptake or by enzymatic breakdown
d. They carry the nerve message on to the postsynaptic neuron
b. They bind to receptors on the axon terminals
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Which of the following DNA sequences is complementary to 5' ATGGTCAGT 3'?
A. 5' ATGGTCAGT 3' B. 5' TGACTGGTA 3' C. 5' TACCAGTCA 3' D. 5' ACTGACCAT 3' Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain? Gather Content · What do you already know about base-pairing? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
In the lab you isolate a Chlorella mutant that is unable to switch xanthophyll pigments into the inactive, non-heat-dissipating form. If you released that mutant into a small pond shaded by trees, would the mutation spread, and why?
A. No, light absorbed by xanthophylls is not used to make ATP or NADPH. B. No, the xanthophylls prevent the production of reactive oxygen species. C. Yes, the xanthophylls prevent the production of reactive oxygen species. D. Yes, the heat released by the xanthophylls would warm up the cells and enhance photosynthesis. E. No, mutations never spread in nature.
Selection of culture media for specific specimens includes a variety of media for all of the following reasons except:
a. a nutritive media is included to insure growth of all potential pathogens. b. a selective media is often included to sup-press normal microbiota or other potential contaminating organisms. c. as enrichment media is utilized to cultivate organisms that do not grow on routine media. d. a back-up broth is included to provide in-oculum for additional testing.
Which protist group includes members with plantlike traits such as chloroplasts and multicellularity?
A. Algae B. Slime molds C. Amoebas D. None of the protists are multicellular.