Including Their Enantiomeric Pairs, How Many Different Aldopentoses are Present

Question

Including their enantiomeric pairs, how many different aldopentoses are present in nature?
A) two
B) four
C) eight
D) sixteen

Accepted Answer

There are eight different aldopentoses present in nature, counting their enantiomeric pairs. These include D-ribose, D-xylose, D-arabinose, D-lyxose, L-ribose, L-xylose, L-arabinose, and L-lyxose.