29. Which best describes the main role of adenosine triphosphate (ATP)? A. It is an amino acid that is part of polypeptide chains that serve structural functions within cells. B. It is a nucleotide that makes up the backbone of DNA and RNA molecules, that harbor the genetic code. C. It is a carbohydrate molecule that can be stored in large quantities in the liver to energize cellular processes. D. It is a purine derivative created from the breakdown of fuel molecules, that transfers energy for cellular processes. E. It is a waste product of aerobic metabolism that is excreted from the body by the kidneys. | |
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