A biochemical function of THFA (tetrahydrofolate) is
A. removal of CO2 from various intermediates in the citric acid cycle.
B. transfer of hydrogens and electrons through the various energy-yielding pathways.
C. transfer of NH2 groups from amino acids to CO2 to form urea.
D. accepting or donating single-carbon molecules in various metabolic pathways.
Answer: D
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