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5 Written Questions

5 Matching Questions

  1. How does the number of protons in a water molecule compare with the number of electrons?
  2. Identify the 4 levels of protein structure.
  3. An ionic bond forms when? A covalent bond forms when?
  4. What is likely to happen to a protein molecule exposed to intense heat or radiation?
  5. What is atomic radiation?
  1. a Ionic: ions with opposite electrical charges attract
    Covalent: a chemical bond between atoms that share electrons.
  2. b 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.
  3. c Primary, Secondary, Tertiary, Quaternary
  4. d Energy or atomic fragments they emit.
  5. e The number of protons equals the number of electrons.

5 Multiple Choice Questions

  1. 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. All matter is composed of fundamental substances.
  3. Saturated: single carbon-carbon bond link all the carbon atoms; each carbon atom binds as many hydrogen atoms as possible & is thus saturated with hydrogen atoms.
    Unsaturated: have one or more double bond between carbon atoms. Fatty acids with one double bond.
  4. 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.
  5. Ions: atom or molecule with an electrical charge.
    Polar: molecule in which the electrons and protons are not distributed symmetrically.

5 True/False Questions

  1. 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.

          

  2. 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.

          

  3. 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

          

  4. What is a buffer?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.

          

  5. What is an Ion?Atoms that have the same atomic number but different atomic weight.

          

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