Which of the following is NOT true of passive diffusion?
A. Passive diffusion is the process by which molecules move from an area of high concentration to an area of low concentration.
B. Passive diffusion is a spontaneous process.
C. Passive diffusion requires the presence of a transmembrane protein.
D. Passive diffusion will occur so long as the membrane is freely permeable to the solute.
E. Passive diffusion requires no energy.
C. Passive diffusion requires the presence of a transmembrane protein.
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Margarine is made by hydrogenating vegetable oils so that they take on the consistency of butter. Propose a chemical basis for this change from a liquid to a solid.
A. Hydrogenation of fats changes them from saturated to unsaturated, which are more solid. B. Trans-fatty acids are changed from unsaturated to saturated, allowing them to solidify. C. Trans fatty acids are changed from saturated to unsaturated, allowing them to solidify. D. Hydrogenation of fats changes them from unsaturated to saturated, which are more solid. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you know about the effect of saturation on the consistency of a fat? How does it relate to the question? 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?
Purine bases, such as adenine and guanine, have ________ joined ring(s) for their structure, compared to pyrimidine bases, such as cytosine and thymine, that have ________ ring(s) in their structure.
Fill in the blank(s) with the appropriate word(s).
Nations enjoy three forms of wealth: __________, __________, and __________
Fill in the blank(s) with the appropriate word(s).
A species has n=4 chromosomes. Genes on the same chromosome have a maximum recombination recombination rate of:
a. 100% b. 75% c. 50% d. 25% e. 0%