Ribose is a: Question 4Answera.ketose and triose b.aldose and hexose c.ketose and pentose d.aldose and pentos

Ribose is a type of sugar. Specifically, it is a monosaccharide, which is the simplest form of sugar.

Step 1: Understand the terms

• Ketose: A sugar where the carbonyl group (C=O) is in any position except the end of the molecule.
• Aldose: A sugar where the carbonyl group (C=O) is at the end of the molecule.
• Triose: A sugar with three carbon atoms.
• Pentose: A sugar with five carbon atoms.
• Hexose: A sugar with six carbon atoms.

Step 2: Identify the characteristics of Ribose Ribose is a sugar with five carbon atoms. The carbonyl group (C=O) is at the end of the molecule.

Step 3: Match the characteristics of Ribose with the options Given the characteristics of Ribose, it matches with the description of an aldose (because the carbonyl group is at the end of the molecule) and a pentose (because it has five carbon atoms).

So, the answer is d. Aldose and Pentose.