Which of the following antimicrobials is contraindicated for children due to permanent tooth discoloration?
A. erythromycin
B. vancomycin
C. gentamicin
D. penicillin G
E. tetracycline
Answer: E
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Which of the following linkages would you expect to find at a branch point in glycogen or amylopectin?
A) ?-1,4-glycosidic linkage B) ?-1,4-glycosidic linkage C) ?-1,6-glycosidic linkage D) ?-1,6-glycosidic linkage
James Watson and Francis Crick ____
a. were both English researchers working at Cambridge University b. performed elegant experiments in DNA chemistry c. constructed an accurate model of DNA’s double helix structure d. performed experiments that convinced scientists that DNA is a double-stranded molecule e. used x-ray diffraction in all of their experiments
Cells conserve energy and resources by making active proteins only when they are needed. If a protein is not needed, which of the following methods of control would be the most energy-efficient?
A. degrade the protein after it is made B. prevent translation of the mRNA C. block transcription D. degrade the mRNA after it is made
At an autosomal gene locus in humans, the allele for brown eyes is dominant over the allele for blue eyes. At another gene locus, located on the X chromosome, a recessive allele produces colorblindness while the dominant allele produces normal color vision. A heterozygous brown-eyed woman who is a carrier of colorblindness has children with a blue-eyed man who is not colorblind. What is the probability that their first child will be a blue-eyed female who has normal color vision? (Enter the probability as a percent. Enter the number only without the percent sign. For example, enter 100% as 100 and enter 12.5% as 12.5)
Fill in the blank(s) with the appropriate word(s).