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Life Science Chapter 3 Study Guide

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  • pg 1
									    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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