A scientist hydrolyzes ATP in allaboratory test tube. He finds that about 3 times as much heat is released than when the same amount of ATP is hydrolyzed in a cell.

What best explains the scientist's observation?

Choose 1

Cells often convert some of the energy from ATP hydrolysis into other usable forms.

Cells are less efficient at producing heat.

Enzymes in cells use heat energy to catalyze reactions.

ATP hydrolysis in a cell makes different products than in a test tube.

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.

Aperson is outside exercising. body temperature begins to rise, and the person starts to sweat. their body temperature then returns to normal, and the body stops sweating. a positive b negative c allosteric d homeopathic

Cells are adapted to preform specific functions. which of the following terms refers to this capability?