Glucose is a six-carbon monosaccharide. It is a reducing sugar. Its molecular signal. It is called aldohexose as it contains aldehyde group. Ripe fruits and honey contain high amounts of glucose. As the ripe fruit contains 12-30% glucose, it is called grape sugar. It is called dextrose, corn sugar, grape sugar, blood sugar and D-glucose. Its relative sweetness is 74. Glucose is produced in the plant body in the process of photosynthesis. However, sugars are never stored in plant bodies. It acts as the primary component of respiration.