The study of individual organisms and the adaptions that have enabled them to survive in their abiotic environments is _________.
a. Organismal Ecology
b. Population Ecology
c. Community Ecology
d. Ecosystem Ecology
Answer: a. Organismal Ecology
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A current problem in modern medicine is the development of drug resistance mutations. This occurs when a mutation arises in a disease-causing microbe making it resistant to a drug and thus rendering the drug useless in treating a specific disease. Many useful drugs are competitive inhibitors of specific enzymes, and the drug-resistance mutations prevent the binding of the drug. These types of mutations, in addition to preventing competitive inhibitor binding, can also sometimes reduce the activity of the enzyme. Why is that the case?
A. Binding to the competitive inhibitor is essential for the function of the enzyme B. These mutations most likely affect an allosteric site on the enzyme C. These mutations lower the activation energy of the reaction catalyzed by the enzyme D. These mutations most likely change the shape of the active site of the enzyme Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about enzymes and how their activity is regulated? How does this drug affect enzyme activity under normal circumstances? What other information is related to the question? Choose Answer Do you have all necessary information to analyze how drug resistance would reduce enzyme activity? 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?
The mechanism of pathogenesis by prions may involve a conformational change in the prion protein (PrP) to an abnormal form.
Answer the following statement true (T) or false (F)
Carbon has an atomic number of 6. This means it has 6 protons and 6 electrons. How many valence electrons does carbon have?
a. 2 b. 6 c. 4 d. 3
In fermentation,
a) the final electron acceptor is organic. b) a large amount of ATP is produced. c) oxygen is required. d) an electron transport chain is required.