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5 Written questions

5 Matching questions

  1. carbohydrates
  2. Levels of Protein structure
  3. nucleic acids
  4. Endomembrane system (Eukaryotic cells)
  5. Covalent bonds
  1. a a system of interconnected membranes that run throughout the cell for synthesis, storage, and transport of products
  2. b 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
  3. c two types, DNA and RNA. DNA forms our genes, RNA reads the genes and helps make proteins, __________ _____ are composed of joined monomers called nucleotides. These nucleotides are composed of a sugar - deoxyribose (DNA) or ribose (RNA), a nitrogenous base (adenine, thymine, cytosine, guanine, or uracil), and a phosphate group
  4. d 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
  5. e strong bonds where atoms share electrons - two or more atoms held together by a covalent bond are called a molecule

5 Multiple choice questions

  1. some atoms lose or gain electrons to form ions. attraction between ions of opposite charge form ionic bonds
  2. larger vesicles, membranous sacs that help in digestion, storage, or water removal
  3. Order, regulation, growth & development, energy processing, response to the environment, reproduction, evolutionary adaptation
  4. chain of carbon atoms in an organic molecule
  5. small nitrogen containing molecules, amino acids, are joined to form dipeptides which are joined to form polypeptides which may be joined to other polypeptides to from proteins. Proteins have unique 3 dimensional shapes or configurations that enable them to function as enzymes to catalyze reactions and function in other active ways.

5 True/False questions

  1. cytoskeletonchain of carbon atoms in an organic molecule

          

  2. Electronsdetermine chemical properties of atoms = how it will react (bond) with other atoms

          

  3. Hydrocarbons=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

          

  4. Eukaryotic Cellslack a membrane enclosed nucleus
    Nucleoid region, Ribosomes, Plasma membrane, Cell wall, Capsule, Pili, Flagella

          

  5. Lipidsthese 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

          

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