When 10,000 molecules of ATP are hydrolyzed to ADP and i in a test tube, about half as much heat is liberated as when a cell hydrolyzes the same amount of ATP. Which of the following is the best explanation for this observation?
A. The reaction in cells must be catalyzed by enzymes, but the reaction in a test tube does not need enzymes.
B. Cells are open systems, but a test tube is a closed system.
C. Reactant and product concentrations in the test tube are different from those in the cell.
D. Cells are less efficient at heat production than nonliving systems.
E. The hydrolysis of ATP in a cell produces different chemical products than does the reaction in a test tube.

D. Cells are less efficient at heat production than nonliving systems.

Explanation:

Cells transform a few of the energy of ATP hydrolysis into different kinds of energy apart from heat. This reaction occurs mostly in the body since the body can function as an enclosed space. The energy generated from ATP might not necessary produce more heat.

In most cases, the energy is employed for varying purposes such as in moving, reasoning apeoplend the different everyday activities. Cells are adequately efficient when contrasted against the non-living systems for sure.

the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.