Which of the following reactions in glycolysis requires ATP as a substrate?A) HexokinaseB) Glyceraldehyde-3-phosphate dehydrogenaseC) Pyruvate kinaseD) AldolaseE) Phosphoglycerate kinase

they float because they are less dense than the water itself

something denser than water, like a rock, will sink to the bottom

c. would be the answer : )

explanation:

a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.