The Free-Energy Change for ATP Hydrolysis to ADP Inside the Cell

question 17

Multiple Choice

The free-energy change for ATP hydrolysis to ADP inside the cell is about -50 kJ/mole. The complete cellular oxidation of glucose to carbon dioxide and water has a free-energy change of about -3000 kJ/mole. What is the efficiency of the cellular metabolism in harvesting this amount of free energy in the form of ATP synthesis?

• A) About 10%
• B) About 20%
• C) About 30%
• D) About 50%
• E) About 70%

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Definitions:

RNAi

Short for RNA interference, it is a biological process in which RNA molecules inhibit gene expression or translation, by neutralizing targeted mRNA molecules.

Complementary

Matching or enhancing by means of compatible or coordinated qualities, often used in various scientific contexts such as complementary DNA.

DNA

A molecule that carries the genetic instructions used in the growth, development, functioning, and reproduction of all known living organisms.

Gene of Interest

A specific gene that researchers focus on for its potential role in disease or other important biological processes.