For each of the following, indicate whether the individual folded polypeptide chain forms a globular (G) or fibrous (F) protein molecule
A. keratin
B. lysozyme
C. elastin
D. collagen
E. hemoglobin
F. actin
A—F; B—G; C—F; D—F; E—G; F—G
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When assessing the role of conjugative bacteria in the spread of antibiotic resistance genes, it is fair to say that Hfr cells contribute most while F- cells contribute least.
Answer the following statement true (T) or false (F)
Which of the following statements considering the human body as an ecosystem is incorrect?
A. Lactobacillus acidophilus and Lactobacillus jensenii are populations within the vaginal community. B. The microbes present in dental plaque constitute a community. C. The skin, the gut, and the nasopharynx are all habitats. D. An infection can be considered a habitat's response to an alteration in environmental conditions.
What would happen if all of the structures corresponding to the one labeled 6 in Figure 41-1 were
removed from the neuron? a. Impulse transmission would be faster. b. Impulse transmission would be slower. c. Impulse transmission would cease. d. Continuous conduction would occur. e. There would be no effect on transmission
What is the main reason that sex-linked disorders are most often observed in males?
A.) The X chromosome only has genes for genetic disorders. B.) The Y chromosome cannot have genes that cause genetic disorders. C.) The Y chromosome cannot mask alleles on the X chromosome. D.) The X chromosome has genes only for sex determination.