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5 Written questions

5 Matching questions

  1. Distinguish between simple and complex carbohydrates.
  2. Compare the chemical composition of carbohydrates, lipids, proteins, and nucleic acid.
  3. Identify 2 types of macromolecules in which hydrogen bonds are important parts of the structure.
  4. An ionic bond forms when? A covalent bond forms when?
  5. Explain how electrons are distributed within the electron shell of atoms.
  1. a Simple: sugars include monosaccharaides, disaccharides; straight chains or rings.
    Complex: polysaccharides are built of simple carbohydrates made of many bonded glucose molecules chains of sugars, cant digest.
  2. b Carbohydrates: C, H, O
    Lipids: C, H, O (often P)
    Protein: C, H, O, N, ( often S)
    Nucleic acids: C, H, O , N , P
  3. c Ionic: ions with opposite electrical charges attract
    Covalent: a chemical bond between atoms that share electrons.
  4. d Each electron shell can hold a limited # of electrons. The maximum number of electrons that each of the 1st three shells can hold for elements of atomic number 18 and under is ...1st shell ( close to the nucleus) 2 e-, second shell 8 e-, third shell 8 e-. More complex atoms may have as many as 18 e- in the 3rd shell.
  5. e Hydrogen bonding is important to Tertiary & Secondary protein structures.

5 Multiple choice questions

  1. Molecular: consists of the symbols of the elements in the molecule with numerical subscripts that indicate how many atoms of each element are present.
    Structural: representation of the way atoms bond in a molecule.
  2. Primary, Secondary, Tertiary, Quaternary
  3. Water
  4. Because body functions result from cellular functions that in turn, result form chemical change
  5. tracks the number of decimal places in a hydrogen ion concentration without writing them out.

5 True/False questions

  1. Where are electrons, protons, and neutrons located within an atom?the nucleus of an atom.


  2. Explain the difference between saturated & unsaturated fats.Electrolyte: substance that ionizes in a water solution
    Nonelectrolyte: organic compounds that dissolve in water, usually do not release ions.


  3. What are the general difference between an organic molecule and an inorganic molecule?Organic: compounds have carbon and hydrogen.
    Inorganic: all other chemicals, chemicals that does not include both carbon and hydrogen atoms.


  4. Explain why some atoms are chemically inert.Synthesis: when 2 or more atoms, ions, or molecules bond to form a more complex structure A+B->AB
    Decomposition: bonds of a reactant molecule break to form simpler molecules, atoms, or ions AB->A+B
    Exchange: parts of 2 different types of molecular trade positions as bonds are broken and new are formed AB + CD-> AD+ BC
    Reversible: product or products can change back to reactant or reactants A+B<-> AB


  5. What is biochemistry?Chemistry of living organisms, a field of life science.


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