The one thing that the scientist changes or manipulates to see how it affects something else is called the
a. dependent variableb. independent variablec. controld. hypothesis

is this a psat question, if so do not cheat try your best.

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.

cell division is not regulated in tumor cells.

hi my name is ashlynn and im 15

these macromolecules could either be amino acids, proteins or nucleic acids. they are responsible for the chemical changes and reactions that affects largely the cell and its composition. take for instance the cytoplasm of the cell where these organelles are settled. these simple organelles are composed of macromolecules which ignites and catalyses different functions that enables cells, in macro-perspective in motion and metabolism. in intestines for example, metabolism happens and breaking down parts of a food to simpler compounds that are used and these nutrients delivered throughout the body and again broken down by into smaller components.