Which Statement Is TRUE of the Biosynthetic Pathway for Purine

question 68

Multiple Choice

Which statement is TRUE of the biosynthetic pathway for purine nucleotides?

• A) CO₂ does not participate in any of the steps in this pathway.
• B) Deoxyribonucleotides are formed from 5-phosphodeoxyribosyl 1-pyrophosphate.
• C) Inosinate is the purine nucleotide that is the precursor of both adenylate and guanylate.
• D) Orotic acid is an essential precursor for purine nucleotides.
• E) The amino acid valine is one of the precursors contributing to purine nucleotides.

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Definitions:

Zero-Factor Property

A rule stating that if the product of two factors equals zero, at least one of the factors must also be zero.

Equation

A statement in mathematics that declares two expressions, often including variables and constants, to be equivalent.

Factor

A number or expression that divides another number or expression evenly, with no remainder.

Zero-Factor Property

The rule stating if a product of two or more factors is zero, at least one of the factors must be zero.