Which of the following statements is true?
A. In a single-blind study, both the researchers and the human subjects don't know their group assignments.
B. Before scientists begin their research, they usually develop a question to guide their study.
C. In the United States, nutrition scientists often conduct studies on humans before doing animal testing.
D. An experimental study doesn't need to have a control group.
Answer: B
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How is iron used in the bone marrow?
a. It is converted to myoglobin and sent to the muscle for storage. b. It is used to produce transferrin. c. It is used to make hemoglobin. d. It is used to convert hemoglobin to myoglobin. e. It becomes a cofactor and used during energy metabolism.
An ________ is an ion that can conduct electricity.
A. electrolyte B. atom C. amp D. enzyme
An organic molecule that combines with an enzyme to activate it is a
A) glucogenic amino acid. B) ketoacid. C) mineral. D) coenzyme.
Ralph Mitchell is a 53-year-old male. He is happily married with three children and has his own business. Today, he is having his yearly physical. He lists the following medications on his "Patient History" paperwork: aspirin, lovastatin, hydrochlorothiazide, warfarin, garlic, and vitamin C. Which of Ralph's medications is an OTC drug??
A) ?aspirin B) ?lovastatin C) ?warfarin D) ?hydrochlorothiazide