Fill in the blank. The rearrangements that result in the common cyclic forms of D-glucose can be seen below. The cyclic form is a(n) ______.

MCQS on the biological importance of organic molecules. Topics include bioorganic mechanisms, chirality, lipids, carbohydrates, animo acids, peptides, proteins, nucleic acids, enzymes, coenzymes, and coupled reactions, and lipid, carbohydrate, amino acid, and nucleotide metabolism.