The production of red blood cells is stimulated by _____
A) low-density lipoproteins
B) immunoglobulins
C) erythropoietin
D) epinephrine
C
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Which one of the following biological polymers is defined by a physical property rather than a chemical structure?
A. proteins B. lipids C. monosaccharides D. nucleic acids E. polysaccharides
The ability of the human body to maintain a relatively constant internal environment is known as ________
A) homeostasis B) stabilization C) positive feedback D) regulation
Which of these transposable elements do not carry genes for functions other than those needed for transposition?
A. Retrotransposons B. Conjugal transposons C. Composite transposons D. Insertion sequences
Adenine (A), thymine (T), guanine (G), and cytosine (C) are the ________ building blocks for DNA; they are organized in different combinations to code for all of the proteins needed to accomplish everything the cell does.
a. carbohydrate b. nucleotide c. protein d. lipid