3. What are pentoses? To
what organic group do
pentoses be long? Are
nucleotides formed of only
one type of pentose?

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
are carbohydrates made of
five carbons. is the pentose
that constitutes DNA and
is the pentose that is part of RNA
nucleotides.