The Figure Below Shows Parts of the Global Carbon Cycle

question 3

Multiple Choice

The figure below shows parts of the global carbon cycle.Which chemicals are also parts of the carbon cycle?

• A) CO (carbon monoxide),C (graphite or diamond),and CO₃ (carbon trioxide)
• B) CH₄ (methane),O₃ (ozone),and C (graphite or diamond)
• C) CH₄ (methane),HCO₃^- (bicarbonate),and CaCO₃ (calcite)
• D) CO (carbon monoxide),CO₃ (carbon trioxide),and CaCO₃ (calcite)

---

Definitions:

Active Site

The specific region of an enzyme where substrate molecules bind and undergo a chemical reaction.

Feedback Inhibition

is a regulatory mechanism where the output of a process inhibits the process itself, often used in metabolic pathways to maintain balance.

Metabolic Pathway

Series of enzyme-mediated reactions by which cells build, remodel, or break down an organic molecule.

Concentration Gradient

The gradual difference in the concentration of solutes in a solution between two regions.