Portage Learning Chem 210 Module 6 Problem Set Exam 2025 Questions and Answers (2025 / 2026) (Verified Answers)

Portage_Learning_Chem_210___Module_6_Problem_Set
Question 1
pts

What is the difference between a nucleoside and nucleotide?


A nucleoside is formed from the covalent bonding of a base, purine or
pyrimidine, to either ribose or 2-deoxyribose. Nucleotides are built from
a nitrogen-containing organic base, a monosaccharide, and phosphate.



Question 2
pts

What characteristic makes purines and pyrimidine heterocyclic?


Each has a ring with nitrogen in the ring instead of all carbon atoms in
the ring.



Question 3
pts


Is this molecule ribose or 2-deoxyribose? Briefly explain what structural
information was used to determine this.




Ribose. This molecule contains an -OH on carbon 2. 2-deoxyribose has an -H
atom on the second carbon.



Question 4

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, pts


Is the following a pyrimidine or purine? Provide the name and one-letter
symbol.


Pyrimidine. It is thymine (T).



Question 5
pts

What is the difference between thymine and uracil?



These two bases differ by a methyl group. Thymine has an extra methyl group on
the ring.




Question 6
pts


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