Achondroplasia ____.
A. is inherited as an autosomal recessive condition
B. affects about one in one million people
C. affects only homozygotes
D. is characterized by abnormally short arms and legs
E. is inherited as an X-linked disorder
Answer: D
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Which is the correct order of protein mediators that are produced during an acute inflammatory response?
A. Chemotaxins, selectins, kallikreins, integrins B. Integrins, kallikreins, selectins, chemotaxins C. Kallikreins, chemotaxins, integrins, selectins D. Selectins, integrins, chemotaxins, kallikreins
What is characteristic of adult frogs?
a. gills b. sucking air into their lungs c. countercurrent exchange d. pushing air into their lungs e. drawing water by inhalation across their gills
A strain of mutant bacteria has been isolated. You isolate the mRNA corresponding to the mutated gene from this bacterial strain to use in an in vitro translation system and note that even in vitro it is difficult to use this message and obtain protein
Of the following, which is a likely explanation for these results? A) There may be a mutation in the Shine–Dalgarno sequence of the DNA, resulting in mRNA that binds poorly to the ribosome. B) There may be a mutation in the ribosomal rRNA recognizing the Shine–Dalgarno sequence of the message. C) This mutant may have altered tRNA molecules, such that the codon–anticodon interaction during translation is affected. D) This mutant may not manufacture enough translation factors for effective translation. E) In this mutant, the ribosomal subunits may not associate well enough for effective translation.
Which of the following bacterial infections CANNOT be transmitted by dog or cat bites?
A) Pasteurella multocida B) Streptobacillus C) Bartonella henselae D) Fusobacterium E) None of the answers is correct; all of these bacterial infections can be transmitted by dog or cat bites.