Each tRNA has an __________ that base-pairs with a codon, and each binds to the kind of amino acid
specified by the codon. Fill in the blank(s) with the appropriate word(s).
ANS: anticodon PTS: 1 DIF: Moderate
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The only class of antibody that can cross the placenta is
A. IgA. B. IgD. C. IgG. D. IgE.
Salivary amylase begins the breakdown of what substance?
a. amino acids b. lipids c. starch d. protein
In which one of the following ways does a proto-oncogene differ from an oncogene?
A) Proto-oncogenes code for proteins that regulate the expression of structural genes; oncogenes code for nucleic acids involved in cell division. B) Proto-oncogenes control normal cell division; oncogenes contribute to the development of cancer. C) When oncogenes become damaged, they become proto-oncogenes. D) Oncogenes activate tumor suppressor genes; proto-oncogenes repress tumor suppressor genes. E) Proto-oncogenes cause cells to self-destruct when damaged; oncogenes cause damaged cells to repair themselves.
You are caring for a 40-year-old man who was exposed to an unknown chemical and has been appropriately decontaminated by the hazardous materials team. The patient responds to pain only, is incontinent of urine and feces, and has a heart rate of 40 beats/min and weak. Further assessment reveals that his breathing effort is poor and his blood pressure is low. After taking standard precautions, the MOST appropriate treatment for this patient involves:
A) protecting his airway with an ET tube, monitoring his cardiac rhythm, establishing vascular access, initiating an epinephrine infusion at 2 µg/min, and considering 0.5 mg of atropine. B) assisting his ventilations with a bag-mask device and 100% oxygen, performing intubation if necessary, establishing vascular access, applying the cardiac monitor, and administering atropine and pralidoxime. C) applying high-flow oxygen via nonrebreathing mask, establishing vascular access, applying the cardiac monitor, attempting immediate transcutaneous cardiac pacing, and administering several 20-mL/kg boluses of normal saline. D) immediately administering 2-PAM chloride, applying supplemental oxygen via nonrebreathing mask, establishing vascular access, administering crystalloid fluid boluses to increase his blood pressure, and monitoring his cardiac rhythm.