Trypsin and chymotrypsin digest
a. fats.
b. proteins.
c. nucleic acids.
d. carbohydrates.
e. vitamins.
B
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CD4 molecules are found on T ________ cells, whereas CD8 molecules are characteristic of T________ cells.
Fill in the blank(s) with the appropriate word(s).
Somatic system fibers in nerves carry
information a. to and from receptors. b. to and from effectors. c. from receptors in skin, tendons, and skeletal muscles. d. to skeletal muscles. e. from receptors in skin, tendons, and skeletal muscle and to skeletal muscles.
A cell contains intermediate filaments, to which organism must the cell then belong?
a. to a unicellular organism b. to a multicellular organism c. to a protist d. to a bacterium
More than ________ antibiotics are produced by Streptomyces
a. 50 b. 500 c. 2500 d. 10,000