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5 Written Questions

5 Matching Questions

  1. hydrogen bonds
  2. carbohydrates
  3. Mitochondria (Eukaryotic cells)
  4. Covalent bonds
  5. Elements
  1. a Combine to form compounds. Are formed of atoms.
  2. b single sugar units such as glucose (= a monosaccharide) are joined to form disaccharides such as maltose which can be joined to other sugars to form polysaccharides such as starch (plants) or glycogen (animals), cellulose is a large polysaccharide made by plants that is not easily broken down, chitin is a polysaccharide used by insects to build their exoskeleton - ________ are important sources of energy, and for building structures in plants and animals
  3. c strong bonds where atoms share electrons - two or more atoms held together by a covalent bond are called a molecule
  4. d found in plants and animals, chemical energy in food such as sugars is converted to an energy source useable in cells called ATP, ___________ have a membrane, an intermembrane space and matrix. Reactions take place in the matrix
  5. e some molecules have charged areas - this makes them polar. Polar areas of molecules can bond with polar areas of other molecules to form weak bonds called hydrogen bonds, hydrogen bonds make water cohesive

5 Multiple Choice Questions

  1. Primary structure = sequence of amino acids
    Secondary structure = coiling to form an alpha helix or folding to form a pleated sheet - hydrogen bonding may be involved
    Tertiary structure - Overall, 3 - D shape, usually described as fibrous or globular
    Quaternary structure - many proteins have multiple peptide chains or subunits - how these fit together is called quaternary structure
  2. chain of carbon atoms in an organic molecule
  3. some atoms lose or gain electrons to form ions. attraction between ions of opposite charge form ionic bonds
  4. a biosynthetic factory, two forms, smooth and rough - Rough - studded with ribosomes, small RNA structures where proteins are manufactured, Smooth - lack ribosomes, wall contains enzymes that make phospholipids, steroids, fatty acids, detoxify poisons, and store minerals used for muscle contraction -________ packages products in tiny sacs called transport vesicles that bud-off
  5. are parts of a molecule that participate in a chemical reaction

5 True/False Questions

  1. RNAreads the genes and helps make proteins


  2. nucleic acidsthese are non-polar, hydrocarbons, which are composed of fat molecules. Fat = glycerol + fatty acid. _______ are 1) important components of cell membranes (phospho_______), 2) molecules (steroids) that regulate cell function, and 3) molecules (waxes) that protect other cells


  3. Atomic Mass=...=...=Mass number=protons+ neutrons


  4. Vacuoles (Eukaryotic cells)houses chromosomes (DNA + chromatin - protein), and nucleolus - site of ribosome parts assembly, in an membrane = nuclear envelope


  5. Lysosomes (Eukaryotic cells)small RNA structures where proteins are manufactured


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