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Question

Which among the following is a ketotriose?

A
Erythrulose
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B
Ribulose
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C
Glyceraldehyde
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D
Dihydroxyacetone
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Solution

The correct option is D Dihydroxyacetone
Trioses are sugar molecules with three carbon atoms. They can be either aldose or sugar with an aldehyde group (aldotriose) or a ketose sugar with a ketone group (ketotriose). Glyceraldehyde is an example of aldotriose while dihydroxyacetone is a ketotriose.

Erythrulose is a ketotetrose or a sugar with 4 carbon atoms and ketone group. Ribulose is a ketopentose or a 5-C sugar with a ketone group.

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