Vitamins partner with which of the following to help maintain normal cell functions?

• A. Enzymes
• B. Lipids
• C. Nucleic acids
• D. Steroids

Answer: (A)

Vitamins function primarily as coenzymes or cofactors that bind to enzymes, enabling them to catalyze the biochemical reactions essential for maintaining normal cell function. This partnership is why vitamins are so critical for metabolism, energy production, synthesis, and repair within cells. For example, several B vitamins form coenzymes like NAD+, FAD, and coenzyme A that shuttle electrons and groups during metabolic processes. Vitamin C also acts as a cofactor for enzymes involved in collagen synthesis and other functions. Without these vitamin-derived coenzymes, enzymes can’t work efficiently, and cellular processes slow down or falter. Lipids, nucleic acids, and steroids have important roles in membranes, genetic information, and hormone signaling, but they do not serve as the primary partners that enable enzyme-catalyzed reactions essential for normal cell function.