Which of the Following Is Correct Regarding the Biosynthesis of Purines

question 6

Multiple Choice

Which of the following is correct regarding the biosynthesis of purines and pyrimidines?

• A) 5-phosphoribosyl-1-pyrophosphate (PRPP) is a precursor to both purines and pyrimidines.
• B) The pyrimidine ring is synthesized first, and then linked to 5-phosphoribosyl-1-pyrophosphate.
• C) The purine ring is built around the C1 of 5-phosphoribosyl-1-pyrophosphate.
• D) All of the above.
• E) None of the above.

---

Definitions:

Genetic Similarity

The extent to which an individual's genetic characteristics resemble those of another person, particularly a relative.

Dizygotic Twins

Twins born from two separate eggs fertilized by two different sperm, also known as fraternal twins.

Physical Trait

Observable characteristics of the body, including appearance, strength, and genetic features.

Genes

Units of heredity made up of DNA that carry information for the development, functioning, and reproduction of organisms.