The Reaction, Base + PRPP → Nucleoside-5-Phosphate + PP_i Is

question 34

Multiple Choice

The reaction, base + PRPP → nucleoside-5-phosphate + PP_i is catalyzed by the enzyme:

• A) nucleotide diphosphate kinase.
• B) phosphoribosyltransferase.
• C) ribose-5-phosphate pyrophosphokinase.
• D) adenylate kinase.
• E) GMP synthetase.

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Definitions:

DNA Helicase

An enzyme that unwinds the DNA helix ahead of the replication fork, allowing the replication machinery to access the single strands of DNA.

Primosome

A complex of proteins responsible for synthesizing the RNA primers required in DNA synthesis.

Single-Strand Binding Proteins

Proteins that bind to single-stranded DNA during replication or repair processes, stabilizing the DNA.

DNA Primase

Enzyme that begins the process of DNA replication by synthesizing a short RNA segment complementary to the DNA template strand; this RNA strand is subsequently degraded and replaced with DNA.