The cancer drugs Gleevec and Herceptin bind to receptor ____________________ and stop the growth of cancer cells. Fill in the blank(s) with the appropriate word(s)
proteins
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An earthworm detects sound ____
a. through specialized tympanic membranes located near the head b. through a thinned region of the exoskeleton that forms a tympanum c. through general mechanoreceptors on its skin d. by using a specialized organ that measures the frequency of vibration of the surrounding dirt particles e. through a series of mechanoreceptors arranged in a lateral line
In honeybees, queen bees are haploid organisms while male drones are diploid
a. True b. False
Which protein blocks the interaction sites that produce skeletal muscle contraction?
a. actin b. myosin c. troponin d. tropomyosin e. sarcoplasmic reticulum
What happens when a protein denatures?
a. Its primary structure is disrupted. b. Its secondary and tertiary structures are disrupted. c. It becomes irreversibly insoluble and precipitates. d. It hydrolyzes into component amino acids. e. Its hydrogen bonds, ionic bonds, hydrophobic interactions, disulfide bridges, and peptide bonds are disrupted.