Which of the following is a cure for mumps?
A) a vaccine
B) an antibiotic
C) host antibodies
D) an antiviral
Answer: D
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An advantage that simple multicellular eukaryotes have over single-celled organisms is the ability:
A. of the cells in the multicellular organism to communicate with one another. B. of the cells in a group of cells to avoid predation. C. for autotrophic cells in the multicellular organism to supply heterotrophic cells with nutrients. D. to respond the external environment more efficiently.
Why are children often told that if they eat too much candy their teeth will fall out?
A. Sugar attacks tooth enamel. B. Sugars gradually replace the tooth enamel. C. Bacteria use the sugar to make ATP. This fermentation process produces acids as a by-product. D. Bacteria secrete acids in order to digest the sugar molecules. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know sugars? How does it relate to the question? · 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?
Transcriptional activation of the lac operon requires both high lactose and low glucose conditions because:a
RNA polymerase requires CAP in order to bind to the lac operon promoter, even in the absence of the repressor. b. glucose normally activates the lac operon repressor. c. RNA polymerase is inactive in the presence of high glucose concentrations. d. high glucose concentrations stimulate CAP activity. e. glucose and lactose compete for binding to, and inactivation of, the lac operon repressor.
If C4 photosynthesis prevents photorespiration, why haven't all plants evolved to use the C4 pathway?
A) C4 produces some toxic by-products. B) C4 is not advantageous in all climates. C) All plants will evolve to be C4 in time. D) C4 is advantageous only in high-oxygen habitats. E) Only some plants use C4 photosynthesis.