BIO 210 - Chapter 3 Exam Questions and Answers 100% Pass

BIO 210 - Chapter 3 Exam Questions and Answers 100% Pass Plasma membrane - Answer- forms the outer boundary of the cell Cellular organelles - Answer- each performs specific functions Nucleus - Answer- contains the cell's genetic material and directs cell activities Cytoplasm - Answer- the material between the plasma membrane and nucleus Main functions of cells - Answer- -cell metabolism and energy release -synthesis of molecules -communication -reproduction and inheritance Plasma membrane - Answer- also called the plasmolemma or cell membrane Functions of the plasma membrane - Answer- -encloses and supports the cell contents -acts as a selective barrier that regulates what goes into and out of the cell -plays a role in communication between cells -separates intracellular substances from extracellular substances Intracellular - Answer- inside cells Extracellular (intercellular) - Answer- between cells also called interstitial fluid Lipid bilayer - Answer- double layer of phospholipids with imbedded proteins Membrane proteins - Answer- protein molecules that "float" among the phspholipid molecules; either embedded in or attached to the phospholipid bilayer Attachment proteins - Answer- proteins that allow cells to attach to other cells