Name the functional group common to both glucose and fructose.

Explanation

To determine the common functional group between glucose and fructose, we can follow these steps:

### Step 1: Identify the Structure of Glucose
- Glucose is a six-carbon sugar (hexose) with the molecular formula C6H12O6.
- It contains an aldehyde functional group (–CHO) at one end of the molecule.

### Step 2: Identify the Structure of Fructose
- Fructose is also a six-carbon sugar with the same molecular formula C6H12O6.
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