Which os the following pair is monosaccharide ?

Options

A. Glucose and Fructose
B. Glucose and Sucrose
C. Ribose and maltose
D. Ribose and Surcose.

Answer

To determine which pair consists of monosaccharides, we need to analyze each option provided:

1. **Option A: Glucose and Fructose**
- **Glucose**: This is a well-known monosaccharide, which is a simple sugar and serves as a primary energy source for cells.
- **Fructose**: This is also a monosaccharide, commonly found in fruits and honey.
- **Conclusion**: Both glucose and fructose are monosaccharides. Therefore, this pair is correct.

2. **Option B: Glucose and Sucrose**
- **Glucose**: As established, glucose is a monosaccharide.
- **Sucrose**: This is a disaccharide composed of glucose and fructose. It is formed when these two monosaccharides bond together.
- **Conclusion**: Since sucrose is a disaccharide, this pair is incorrect.

3. **Option C: Ribose and Maltose**
- **Ribose**: This is a monosaccharide, specifically a pentose sugar that is part of nucleic acids (RNA).
- **Maltose**: This is a disaccharide formed from two glucose molecules.
- **Conclusion**: Since maltose is a disaccharide, this pair is incorrect.

4. **Option D: Ribose and Sucrose**
- **Ribose**: As mentioned, ribose is a monosaccharide.
- **Sucrose**: Again, sucrose is a disaccharide made from glucose and fructose.
- **Conclusion**: Since sucrose is a disaccharide, this pair is also incorrect.

**Final Answer**: The correct pair that consists of monosaccharides is **Option A: Glucose and Fructose**.