All of the chemical reactions that occur within a cell are collectively referred to as metabolism. This includes , which are those reactions that use energy and synthesize building blocks and macromolecules, and , which are the cellular reactions that break larger molecules into smaller molecules and release energy.

In what way do investigations build scientific knowledge? the results of investigations lead to questions that cannot be tested. they reflect the opinions and social values of scientists, ensuring valid information. the results of investigations lead to new questions, which lead to new investigations. they are not influenced by the research of earlier scientists, so they are able to address gaps in understanding.i