Aldohexose in the following is

Options

A. cellulose
B. glucose
C. fructose
D. lactose

Explanation

To determine which of the given options is an aldohexose, we need to follow these steps:

### Step 1: Understand the definition of aldohexose
An aldohexose is a type of sugar (monosaccharide) that contains six carbon atoms (hexose) and an aldehyde functional group (aldo). The general formula for aldohexoses is C6H12O6.

### Step 2: Identify the structure of aldohexose
The structure of an aldohexose will have:
- An aldehyde group (–CHO) at one end of the carbon chain.
- A total of six carbon atoms in the chain.
- Hydroxyl groups (–OH) attached to the other carbon atoms.

### Step 3: Examine common aldohexoses
The most common aldohexose is glucose. Its structure can be represented as follows:
- The first carbon is part of the aldehyde group (–CHO).
- The remaining five carbons are connected in a chain with hydroxyl groups (–OH) attached.

### Step 4: Compare with other sugars
While fructose is also a hexose, it is a ketohexose because it contains a ketone group instead of an aldehyde group. Therefore, it does not qualify as an aldohexose.

### Step 5: Conclusion
Based on the above analysis, the aldohexose among the options provided is glucose.

### Final Answer
The aldohexose in the following is glucose.

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