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5 Written questions

5 Matching questions

  1. Compare the characteristics of an acid, a base & a salt.
  2. Explain why some atoms are chemically inert.
  3. How does an enzymes affect a chemical reactions?
  4. List 3 main types of lipids found in cells.
  5. Describe 4 types of chemical reactions.
  1. a Acid: substance that releases hydrogen ion
    Base: substance that release ions that can combine with hydrogen ions
    Salt: substance formed by the reaction between and acid and a base.
  2. b fats, phospholipids, and steroids.
  3. c They bring the reactants close together, chemical bonds may be weakened and reactions will proceed faster and without catalyst. They speed specific chemical reactions without being consumed.
  4. d Atoms whose outermost electron shells are filled already have stable structures and are chemically inactive.
  5. e 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 Multiple choice questions

  1. Primary, Secondary, Tertiary, Quaternary
  2. All matter is composed of fundamental substances.
  3. they are chemicals that resist pH change. They combine with hydrogen ions when these ions are in excess or they donate hydrogen ions when these ions are depleted.
  4. The number of protons equals the number of electrons.
  5. tracks the number of decimal places in a hydrogen ion concentration without writing them out.

5 True/False questions

  1. Distinguish between an ion and a polar molecule.Molecule: two or more atoms may combine to form a distinctive type of particle.
    Compound: substance composed of two or more chemically bonded elements.


  2. Why is a knowledge of chemistry essential to understanding physiology?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.


  3. 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.


  4. What is biochemistry?Atoms that gain or lose electrons because electrically charge.


  5. Compare the chemical composition of carbohydrates, lipids, proteins, and nucleic acid.Carbohydrates: C, H, O
    Lipids: C, H, O (often P)
    Protein: C, H, O, N, ( often S)
    Nucleic acids: C, H, O , N , P


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