Articles > Reducing sugar definition – quiz Reducing sugar definition – quiz Quiz Choose the best answer. 1. A reducing sugar acts as an oxidizer loses electron to another molecule undergoes reduction in redox reaction 2. A reducing sugar would have an aldehyde group a ketone group either an aldehyde or a ketone group 3. Which of the following is NOT a reducing sugar? Sucrose Maltose Lactose 4. Reducing sugars with -CHO group Ketoses Aldoses Ketoses and aldoses 5. Which of the following is a ketose? Glucose Mannose Fructose Send Your Results (Optional) Your Name To Email Time is Up!