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.

liquid crystals are matters in a state which have properties between those of conventional liquids and those of solid crystals[1]. liquid crystal is partially ordered and anisotropic. in terms of molecular order, liquid crystal molecules have one-dimensional or two-dimensional long - range order.

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.