Many environmental factors influence the structure of biological membranes. Which of the following could permanently disrupt phospholipid bilayers in an aqueous solution?
A. the addition of acid to change the pH
B. physical agitation of the solution
C. slight elevation of the temperature
Answer Key: A
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You have recently identified a novel protein and obtained its sequence. How could you use this sequence to predict the function of the protein?
A. By using the sequence to make antibodies against the protein. B. By determining the secondary structure of the protein. C. By determining the DNA sequence that could encode the protein. D. By looking for conserved domains. 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 protein function? 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?
Quality control is set up to test urea agar. M. genitalium and M. hominis are used; however, both organisms are negative for urease activity. Which one of the following statements explains these findings?
a. The urea agar is most likely expired. b. The incubation time is most likely abbre-viated. c. A technical error has occurred. d. These two organisms are poor choices for quality control of urea agar.
Tendons are bands of connective tissue that attach _______ to _______.
A. muscle; bone B. ligaments; bone C. muscle; muscle D. bone; bone E. cartilage; bone
The genetic preservation of the features that increase the likelihood of survival and reproduction of some individuals within a population is called the process of
A. creation of new species. B. natural selection. C. outcrossing. D. genetic drift. E. increasing evolutionary resistance.