Which amino acid always begins a polypeptide (protein) during translation?

A) valine
B) phenylalanine
C) methionine
D) arginine


C

Biology & Microbiology

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Extrapulmonary TB is more common in

A. AIDS patients. B. the elderly. C. organ transplant patients. D. young children and immunosuppressed patients. E. All of the choices are correct.

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Which of the following is NOT involved in some

way in the body’s first line of defense? a. urination b. diarrhea c. gastric juice d. complement e. ciliated cells

Biology & Microbiology

Carbon monoxide can be released by brain cells and stimulates

a. adenylate cyclase and blood vessel contraction. b. guanylate cyclase and blood vessel dilation. c. NO-synthase and muscle cell contraction. d. cyclooxygenase and prostaglandin synthesis.

Biology & Microbiology

Which of the following toxins is NOT a cytolytic exotoxin?

a. hemolysin b. Shiga toxin c. leukocidin d. phospholipase

Biology & Microbiology