An enzyme is also known as
A. an inorganic protein.
B. an organic catalyst.
C. a metal ion.
D. an inhibitor.
B. an organic catalyst.
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Which of the following is made from DNA?
a. tRNA only b. mRNA only c. rRNA only d. mRNA and tRNA only e. mRNA, tRNA, and rRNA
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 fact that salt dissolves in water is best explained by the
A) slightly charged nature of water molecules. B) ionic nature of water molecules. C) hydrophobic nature of the water. D) hydrophobic nature of salt. E) polar nature of water molecules.
Systemic lupus erythematosus is an autoimmune disease that is an example of a(an) _____________ hypersensitivity
A. Anaphylactic B. Hyposensitization C. Cytotoxic D. Cellular E. Immune complex