In Purine Biosynthesis, Which Ring Nitrogens Are Contributed by the Sidechain

question 96

Multiple Choice

In purine biosynthesis, which ring nitrogens are contributed by the sidechain of glutamine?

• A) N1 only
• B) N1 and N3
• C) N1, N3, and N9
• D) N1 and N9
• E) N3 and N9

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Definitions:

Ice

Frozen water, a solid state of H2O, typically formed in cold temperatures.

Swelling

An abnormal enlargement of a body part or area due to fluid accumulation or inflammation.

Incomplete Fractures

A type of bone fracture where the bone cracks but does not break all the way through.

Fragments

Small parts or pieces that have broken off from a whole, often resulting from decay, damage, or destruction.