Step 1 : Introduction to the question "7. Which is NOT a carbohydrate?"
...1. Galactose 2. Polysaccharide 3. Protein 4. Pentose Proteins are a nutrient class separate from carbohydrates. Polysaccharide (a long chain of simple sugars), pentose (5-carbon sugar), and galactose (a simple 6-carbon sugar) are all carbohydrates.
