Nucleotide Metabolism Flashcards Preview

Elements of Medicine > Nucleotide Metabolism > Flashcards

Flashcards in Nucleotide Metabolism Deck (11):
1

T/F. Nucleic acids are like amino acids in that they can be obtained from nutrients.

False.
Nucleic acids are synthesized independently in the body.

2

What are the two paths of nucleotide biosynthesis?

De Novo and Salvage pathways

3

Hepatocytes often follow the ______ pathway for nucleotide biosynthesis while the rest of the body's cells follow the ______ pathway.

de novo, salvage

4

DNA replication is happening constantly in the body. How many nucleic acids can be found in the cellular pool?

Not a lot. Synthesis must occur constantly

5

Because purine and pyrimidine synthesis are constantly occurring, stopping these biosynthesis pathways leads to what?

Disease, cancer, dangerous.

6

What amino acid is central to purine and pyrimidine biosynthesis?

Glutamine

7

In the purine de novo pathway, what is the first committed step?

Amino acid group dedication (Glucoses)

8

What are the three main steps in the purine de novo pathway?

1. Glu dedication
2. PRPP regulatory step
3. Tetrahydrofolate to dihydrofolate

9

Cancer drugs can target ______ recycling which would inhibit both purine and pyrimidine formation.

Tetrahydrofolate

10

What molecule acts as a precursor for both AMP and GMP?

IMP

11

How are GMP and ATP related in the purine de novo pathway?

The formation of ATP requires GTP. The formation of GTP relies on enough GMP formation at the end of the pathway.
Same for AMP and GTP