High Levels of Citric Acid Inhibit the Enzyme Phosphofructokinase, a Key

question 3

Multiple Choice

High levels of citric acid inhibit the enzyme phosphofructokinase, a key enzyme in glycolysis. Citric acid binds to the enzyme at a different location from the active site. This is an example of ________.

• A) competitive inhibition
• B) allosteric regulation
• C) the specificity of enzymes for their substrates
• D) positive feedback regulation

---

Definitions:

Substitute Resources

Productive inputs that can be used instead of other inputs in the production process; resources for which an increase in the price of one leads to an increase in the demand for the other.

Complementary Resources

Productive inputs that are used jointly with other inputs in the production process; resources for which a decrease in the price of one leads to an increase in the demand for the other.

Backflows

In a systems context, refers to the reverse flow of a liquid, gas, or other substance, counter to the intended or normal direction, which can create issues such as contamination.

Skill Transferability

The ease with which people can shift their work talents from one job, region, or country to another job, region, or country.