Natural Science Clep Exam Review Questions And Answers, Graded A+

NATURAL SCIENCE CLEP EXAM REVIEW QUESTIONS AND ANSWERS, GRADED A+ cell - -smallest unit of most living things organism - -living thing prokaryotes - -cells that lack a membrane-bound nucleus and membrane-bound organelles organelles - -small structures in the cytoplasm of a cell that do special jobs eukoryotic cells - -has a nucleus, has organelles or other cell parts virus - -particle made up of DNA, RNA, protein, and in some cases lipids that can only replicate only by infecting living cells electron microscope - -used to examine tiny cell organelles cell membrane - -composed of a bilayer of lipids embedded with globular proteins endocytic vesicles - -Formed when cell membrane surrounds a molecule outside the cell and ingests it microvilli - -projections on cell membrane increase surface area cytoskeleton - -provides structural support to a cell composed of microtubules, microfilaments, centrioles microtubules - -hollow tubes of protein about 25 nanometers in diameter, support the cell and moves organelles within the cell microfilaments - -double-stranded chains of proteins which give structure to the cell centrioles - -tubes, One of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope; play a role in cell division. ribosomes - -site of protein synthesis. Free ribosomes - float unattached; attached ribosomes - attached to the ER endoplasmic reticulum - -an internal membrane system in which components of cell membrane and some proteins are constructed. rough - instrumental in protein synthesis; smooth - processes lipids fats and steroids golgi apparatus - -stores, packages and ships protei