Sometimes premature babies suffer from respiratory distress syndrome. What substance would you administer in a breathing tube to the infant?
A) antibiotics
B) anti-inflammatory drugs
C) surfactant
D) hydrocortisone
C
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When the peptide bond is created between amino acid 1 and amino acid 2:
A. the amino group of amino acid 1 is joined to the carboxyl group of amino acid 2. B. the carboxyl group of amino acid 1 is joined to the amino group of amino acid 2. C. the carboxyl group of amino acid 1 is joined to the carboxyl group of amino acid 2. D. the amino group of amino acid 1 is joined to the amino group of amino acid 2.
Irradiation of cells with ultraviolet light may cause
A. four nucleotides to covalently bind together. B. thymine dimers. C. adenine complementary base pairing with cytosine. D. the addition of uracil.
Spiders use which mouthparts for subduing prey?
a. mandibles b. pedipalps c. chelicerae d. maxillae e. labial palps
Which organ system removes nitrogen-containing waste products from blood?
A) lymphatic system B) integumentary system C) muscular system D) urinary system