Use the Following to Answer Questions

question 181

Multiple Choice

Use the following to answer questions:
-(Table: Lunch) Look at the figure Lunch. Joe makes and sells picnic lunches to people taking all-day rafting trips on the river. The marginal cost and average cost of each lunch are a constant $4. If Joe is one of many firms in a competitive industry, how many lunches will he produce in the long run?

• A) 0
• B) 20
• C) 40
• D) 60

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Definitions:

Phosphorylation

The introduction of a phosphate group into an organic molecule. See kinases.

ATP

Adenosine triphosphate, a high-energy molecule used for energy storage and transfer within cells.

Electron Transport Chain

A series of complexes that transfer electrons from electron donors to electron acceptors via redox reactions, coupled with the transfer of protons across a membrane, generating ATP.

Proton Gradient

A gradient of hydrogen ions (protons) across a membrane, used as a source of energy for processes like ATP synthesis.