The cause of tetanus is
A) Campylobacter.
B) Escherichia coli.
C) Clostridium tetani.
D) Borrelia burgdorferi.
E) Streptococcus pneumoniae.
C
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What role is played by tRNA?
a. tRNA provides the mechanism that replaces thymine in DNA with uracil in mRNA. b. tRNA joins its amino acid to the peptide chain when it matches an mRNA codon. c. tRNA unwinds mRNA in advance of the polymerase responsible for transcription. d. tRNA binds to the promoter region and recruits the correct polymerase for transcription.
A patient has a tumor that causes her to secrete an excess amount of antidiuretic hormone (ADH). You would expect that the excessive level of ADH will ultimately cause ________
A) decreased blood pressure B) increased blood pressure C) an increase in urine volume D) increased ventilation rate
Ventricular fibrillation is occurring in a patient who has just arrived in the emergency room. Which one of the following treatments may be applied immediately to correct this potentially fatal arrhythmia?
A) implantation of an artificial pacemaker B) coronary artery bypass surgery C) cardioversion D) balloon angioplasty E) replacement of the defective heart valve
The tall ferns that we typically see in the tropics and temperate woodlands are the ________
A) sporophytes B) gametophytes C) gametes D) spores