________ is a condition associated with vitamin D deficiency in adults that is characterized by softening of the bones.
A. Melanin
B. Rickets
C. Osteoporosis
D. Osteomalacia
Answer: D
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The three-dimensional shape of a protein is determined by the:
a. ratio of nonessential to essential amino acids present in the polypeptide chain. b. sequence of amino acids in the polypeptide chain. c. carbon to nitrogen ratio in the polypeptide chain. d. the number of peptide bonds present in the polypeptide chain.
Which of the following conditions increases the release of oxygen from hemoglobin?
Exposure to low levels of lead can lead to hearing problems
a. True b. False Indicate whether the statement is true or false
Which of the following statements is false about fiber? Fiber:?
A) is noncaloric. B) decreases the caloric density of the diet. C) hardens stool. D) binds beta-carotene. E) is soluble in or attracts water.