All amino acid molecules contain
A) carbon, hydrogen, oxygen and phosphate.
B) carbon, oxygen and nitrogen.
C) carbon, nitrogen and hydrogen.
D) carbon, nitrogen, hydrogen and oxygen.
E) carbon, nitrogen, oxygen, phosphate and sulfate.
Answer: D
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The nitrogenous bases of DNA and RNA provide informational content because
A. they all contain nitrogen. B. the bases are of several types and therefore can form a code sequence. C. their sugars and phosphates vary. D. the bases are also parts of amino acids.
Anterior to the vagina and urethral openings is the
a) Labia majora b) Labia minor c) Mons pubis d) Cervical sphincter e) Labial frenulum
Which of the following statements best describes interstitial growth?
A) Growth occurs in the lining of the long bones. B) Fibroblasts give rise to chondrocytes that differentiate and form cartilage. C) Unspecialized cells from mesenchyme develop into chondrocytes, which divide and form cartilage. D) Chondrocytes in the lacunae divide and secrete matrix, allowing the cartilage to grow from within.
Identify the situations that would stimulate the reticular activating system. (Check all that apply.)
A. Wearing a set of silencing headphones B. A darkened room C. Smelling breakfast odors D. Exposure to smelling salts E. A ringing fire alarm