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5 Written questions

5 Matching questions

  1. What is likely to happen to a protein molecule exposed to intense heat or radiation?
  2. Where are electrons, protons, and neutrons located within an atom?
  3. A hydrophilic molecule dissolved in....
  4. Compare the chemical composition of carbohydrates, lipids, proteins, and nucleic acid.
  5. How does the hydrogen ion concentration compare between a solution of pH 6.4 and a solution of pH 8.42.
  1. a Water
  2. b The solution at pH 6.4 has 100 times the hydrogen ion concentration of a solution at pH 8.42.
  3. c 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.
  4. d the nucleus of an atom.
  5. e Carbohydrates: C, H, O
    Lipids: C, H, O (often P)
    Protein: C, H, O, N, ( often S)
    Nucleic acids: C, H, O , N , P

5 Multiple choice questions

  1. The body regularly gains and loses these electrolytes, but they must be present in certain concentrations, both inside and outside cells, to maintain homeostasis.
  2. Electrolyte: substance that ionizes in a water solution
    Nonelectrolyte: organic compounds that dissolve in water, usually do not release ions.
  3. 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. 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.
  5. DNA: molecules store the information for protein synthesis.
    RNA: molecules use this information to construct specific protein molecules.

5 True/False questions

  1. An ionic bond forms when? A covalent bond forms when?Ionic: ions with opposite electrical charges attract
    Covalent: a chemical bond between atoms that share electrons.


  2. What is an isotope?Atoms that have the same atomic number but different atomic weight.


  3. Why is a knowledge of chemistry essential to understanding physiology?Because body functions result from cellular functions that in turn, result form chemical change


  4. Which elements are most common in the human body?DNA: molecules store the information for protein synthesis.
    RNA: molecules use this information to construct specific protein molecules.


  5. What is a molecular formula? A structural formula?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.


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