What specific event triggers the uncovering of the myosin binding site on actin?
A. Calcium ions bind to troponin and change its shape.
B. Sodium ions bind to troponin and change its shape.
C. Calcium ions bind to tropomyosin and change its shape.
D. Calcium release channels open in the sarcoplasmic reticulum, and calcium levels rise in the sarcoplasm.
Answer: A. Calcium ions bind to troponin and change its shape.
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Bacteria that most commonly cause food-borne illnesses _____
a. usually change the taste of foods b. usually change the smell of foods c. usually change the appearance of foods d. are unable to grow below 0°F e. can only be killed with an alcohol-based hand sanitizer
It is most helpful to think about modified diets in terms of:
a. the diseases they are used to treat. b. the organ systems they relate to. c. the conditions they are used to treat. d. the symptoms they relieve.
Alcohol dehydrogenase is the enzyme that catalyzes
A. the transport of ethanol into cells. B. the conversion of ethanol to acetaldehyde. C. the conversion of ethanol to acetic acid. D. the conversion of acetaldehyde to ethanol.
Lead in food can come from ____
a. discarded electrical equipment b. lead crystal ware c. sewage sludge d. PCB containers e. corks on wine bottles