[Campbell Biology P.117] According to Figure 5.3 and the accompanying text, which of the fol... | Practice Question

According to Figure 5.3 and the accompanying text, which of the following sugars is classified as both a ketose and a hexose?

  • A: Ribose
  • B: Glyceraldehyde
  • C: Fructose
  • D: Galactose

Explanation

The text states that 'fructose, an isomer of glucose, is a ketose.' Figure 5.3 shows Fructose as having its carbonyl group within the carbon skeleton, confirming it is a ketose. The text also mentions that 'Glucose, fructose, and other sugars that have six carbons are called hexoses.' Therefore, Fructose is correctly classified as both a ketose and a hexose.