Structure of mannose ribose fructose

Mannose (C₆H₁₂O₆):

• Mannose is an aldohexose sugar. Its structure is similar to glucose but differs in the configuration of the hydroxyl groups.
• Fischer Projection:

    CHO

     |

   HO-CH

     |

   HO-CH

     |

   CH2OH

Ribose (C₅H₁₀O₅):

• Ribose is a pentose sugar and is commonly found in RNA.
• Fischer Projection:

CHO

     |

   HO-CH

     |

   HO-CH

     |

   CH2OH

Fructose (C₆H₁₂O₆):

• Fructose is a ketohexose and is found in many plants.
• Fischer Projection:

    O

    ||

   C-CH2OH

     |

   HO-CH

     |

   HO-CH

     |

   CH2OH

These are simplified representations of their structures.