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5 Written questions

5 Matching questions

  1. A hydrophilic molecule dissolved in....
  2. What is biochemistry?
  3. Define electrolyte balance.
  4. Explain why some atoms are chemically inert.
  5. Distinguish between an ion and a polar molecule.
  1. a Atoms whose outermost electron shells are filled already have stable structures and are chemically inactive.
  2. b Water
  3. c Ions: atom or molecule with an electrical charge.
    Polar: molecule in which the electrons and protons are not distributed symmetrically.
  4. d The body regularly gains and loses these electrolytes, but they must be present in certain concentrations, both inside and outside cells, to maintain homeostasis.
  5. e Chemistry of living organisms, a field of life science.

5 Multiple choice questions

  1. Electrolyte: substance that ionizes in a water solution
    Nonelectrolyte: organic compounds that dissolve in water, usually do not release ions.
  2. Two atoms of hydrogen can combine with one atom of oxygen to produce a molecule of the compound water.
    Atoms of the same element combine, they produce molecules of that element.
  3. Organic: compounds have carbon and hydrogen.
    Inorganic: all other chemicals, chemicals that does not include both carbon and hydrogen atoms.
  4. Molecule: two or more atoms may combine to form a distinctive type of particle.
    Compound: substance composed of two or more chemically bonded elements.
  5. Carbon, hydrogen, oxygen, nitrogen, sulfur, phosphorus.

5 True/False questions

  1. Compare the chemical composition of carbohydrates, lipids, proteins, and nucleic acid.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. Identify 2 types of macromolecules in which hydrogen bonds are important parts of the structure.Hydrogen bonding is important to Tertiary & Secondary protein structures.


  3. List 3 main types of lipids found in cells.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


  4. What is likely to happen to a protein molecule exposed to intense heat or radiation?All proteins have a special shape and their shape determines what function they will perform. Proteins can become denatured or their shape can change and it'll cause the loss of function. Proteins exposed to heat will most likely become denatured and lose the ability to perform their task.


  5. Identify the 4 levels of protein structure.Primary, Secondary, Tertiary, Quaternary