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MDCAT
Biology
2024

Biology · Biological Molecules

Work through this past-paper style MCQ, then read the full explanation. Practice more biology questions on mMCQ with adaptive practice and topic analytics.

Question

Ribose is an example of sugar:

Options
  • A

    Pentose

  • B

    Hexose

  • C

    Heptose

  • D

    Tetrose

Explanation

Ribose is a five-carbon sugar, and it’s a key part of both RNA and ATP.

Its pentose structure helps form the backbone of RNA and also fits into the energy-carrying structure of ATP.

Right. Ribose is a five-carbon sugar, and it’s a key part of both RNA and ATP.

Its pentose structure helps form the backbone of RNA and also fits into the energy-carrying structure of ATP.

Ribose is indeed a five-carbon sugar, and it shows up in both RNA and ATP.

Its structure forms the backbone of RNA and also fits into the molecule that stores and transfers energy in cells. Hexose is a six carbon sugar.

Incorrect. Heptoses contain seven carbon atoms, not five. Ribose is a five carbon sugar.

Incorrect. Tetroses contain four carbon atoms, while ribose has five. Ribose is a five-carbon sugar.

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Tagged under Biology · Biological Molecules · 2024