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Life Science Chapter 3 Study Guide • the total of all chemical reactions in an • active transport organism • Diffusion • an organism that makes its own food • Endocytosis • movement of molecules from an area • Enzyme where there are many to an area • Exocytosis where there are few • compound that does not contain • Fermentation carbon • inorganic compound • a substance that speeds up a chemical • Metabolism reaction in a cell • Mixture • passive transport of water by diffusion • organic compound • when the contents of a vesicle are • Osmosis released by the cell • passive transport • movement of substances without the • producer use of energy • large molecules are surrounded by the cell membrane and enter the cell • a combination of substances; each substance keeps its identity • An atom’s nucleus contains ______. – a. neutrons only c. neutrons, protons, and electrons – b. protons and electrons d. protons and neutrons • A chemical formula shows the kind and number of atoms that form a ______. – a. compound b. mixture c. solution d. suspension • Organic compounds that store important coded information in cells are ______. – a. carbohydrates b. lipids c. nucleic acids d. water molecules • The function of the selectively permeable cell ______ is to allow some things to pass through it, but not others. – a. cytoplasm b. membrane c. nucleus d. wall • Bacteria are taken into cells by ______. – a. diffusion b. endocytosis c. exocytosis d. osmosis • Organic compounds are compounds that always contain ______. – a. carbon b. calcium c. nitrogen d. oxygen • ______ are organic compounds made of sugars or starches. – a. Carbohydrates b. Enzymes c. Lipids d. Nucleic acids • ______ are organic compounds that store energy. – a. Enzymes b. Lipids c. Nucleic acids d. Proteins • In a(n) ______, substances mix evenly with other substances. – a. inorganic compound c. solution – b. organic compound d. suspension • The movement of large molecules through the cell membrane out of the cell is called ______. – a. endocytosis b. exocytosis c. homeostasis d. osmosis • If the movement of molecules requires energy, it is ______. – a. active transport c. osmosis – b. diffusion d. passive transport • ______ is a process that releases energy when oxygen is insufficient. – a. Photosynthesis c. Fermentation b. Equilibrium d. Metabolization • ______ are organisms that can’t make food. – a. Plants c. Consumers b. Enzymes d. Producers • Producers use light energy to make ______. – a. chlorophyll b. glucose c. proteins d. starch When you drop a sugar cube in a glass of water, at first the water doesn’t taste sweet. Later, it tastes very sweet. • What causes the change in the water’s taste? • Is active or passive transport involved? • What is the name of this type of molecule movement? • What term explains molecule movement to maintain a balance with the environment? When making yeast bread dough, the dough rises after a while in the pan. • What causes dough to rise? • What is the name of this process? • In a mixture, substances 11. ___________________ their original properties. Mixtures are important in life processes. A 12. ____________________ is a mixture in which one or more substances mix evenly with other substances. A 13. ___________________ is a mixture in which substances spread through a liquid or gas but settle out over time. Water is the compound that makes up a larger part of 14. ____________________ matter than any other. Water helps keep the temperature of cells constant so 15. ____________________ reactions can take place. • particle with a negative • active transport charge • Neutron • particle with a positive • Diffusion charge • Electron • particle with no charge • Producer • salt and water mixture • Proton • Blood • Solution • plant that contains • suspension chlorophyll • movement of minerals into plant root cells • dispersal of air freshener throughout a room Extra Credit • Describe the processes of photosynthesis and respiration. • How do large molecules enter a cell?
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