Every carbohydrate is

Options

A. aldose or ketose
B. ribose or deoxyribose
C. hexose or pentose
D. trioses or tetroses

Answer

To answer the question "Every carbohydrate is," we can break down the information provided in the video transcript step by step.

### Step-by-Step Solution:

1. **Definition of Carbohydrates**: Carbohydrates are biomolecules that primarily consist of carbon (C), hydrogen (H), and oxygen (O) atoms. The general empirical formula for carbohydrates is often represented as \( C_n(H_2O)_n \), indicating a ratio of hydrogen to oxygen of 2:1.

2. **Classification of Carbohydrates**: Carbohydrates can be classified into different categories based on their structure:
- **Monosaccharides**: Simple sugars that cannot be hydrolyzed into simpler sugars (e.g., glucose, fructose).
- **Oligosaccharides**: Short chains of monosaccharides (typically 2-10 units).
- **Polysaccharides**: Long chains of monosaccharides (e.g., starch, glycogen).

3. **Types of Carbohydrates**: Carbohydrates can be further classified based on their functional groups:
- **Aldoses**: Carbohydrates that contain an aldehyde group (-CHO). An example is ribose.
- **Ketoses**: Carbohydrates that contain a ketone group (C=O). An example is fructose.

4. **Conclusion**: Therefore, every carbohydrate can be categorized as either an aldose or a ketose based on the presence of their respective functional groups.

### Final Answer:
Every carbohydrate is an **aldose or ketose**.

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