The Purine Ring System Is Shown Below

question 74

Multiple Choice

The purine ring system is shown below.What is the source of the carbon atoms 2 and 8 during de novo biosynthesis of purines?

• A)Carbon dioxide.
• B)Aspartate.
• C)10-formyltetrahydrofolate.
• D)Glutamine.

---

Definitions:

Political

Relating to the government, public affairs, or the administration of public policy.

Trade War

A situation in which countries try to damage each other’s trade, typically by the imposition of tariff and quota restrictions.

Tariffs

Taxes imposed by a government on goods and services imported from other countries.

Quotas

Set limits or targets, usually pertaining to sales, production, or imports and exports, that a company or government aims to achieve.