Which of the Following Ions Is Associated with the Heme

question 14

Multiple Choice

Which of the following ions is associated with the heme portion of hemoglobin?

• A) Ca²⁺
• B) Fe²⁺
• C) Mg²⁺
• D) Zn²⁺

---

Definitions:

Tax Burden

The measure of the financial charge or impact of taxes on an individual or a corporation.

Excise Tax

A tax on specific goods or services, such as tobacco, alcohol, and gasoline, designed to raise revenue and/or discourage consumption of certain products.

Equilibrium

A state in which the conflicting forces of demand and supply are in balance. When a market is in equilibrium, the decisions of consumers and producers are brought into harmony with one another, and the quantity demanded will equal the quantity supplied.

Revenue

Aggregate income a company secures from its sales of products or rendering of services in a given period.