Which of These Equations Demonstrates Energetic Coupling in a Cell

question 10

Multiple Choice

Which of these equations demonstrates energetic coupling in a cell? Equation 1: ATP + H₂O  ADP + P_i
G₁ = -7 kcal/mol
Equation 2: phosphoenolpyruvate + H₂O  pyruvate + P_i
G₂ = -14.8 kcal/mol
Equation 3: glucose + P_i  glucose-6-phosphate + H₂O
G₃ = +3.3 kcal/mol
Equation 4: ADP + P_i  ATP + H₂O
G₃ = +7 kcal/mol

• A)equations 1 and 2
• B)equations 2 and 3
• C)equations 3 and 4
• D)equations 1 and 4
• E)equations 1 and 3

---

Definitions:

Egg Yolks

The yellow, nutrient-rich part of an egg that contains fats, proteins, vitamins, and minerals, serving as a primary food source for the developing embryo.

Fortified Breads

Breads that have been enriched with additional vitamins and minerals, beyond what they naturally contain.

Selenium

A chemical element with symbol Se and atomic number 34, known for its role in human health as a trace mineral important for the antioxidant activity of certain enzymes.

Fertility

The capability of an organism to reproduce, often evaluated in terms of the quality and quantity of gametes.