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5 Written questions

5 Matching questions

  1. A hydrophilic molecule dissolved in....
  2. What are the functions of DNA and RNA?
  3. What is an Ion?
  4. What is the difference between an electrolyte and a nonelectrolyte?
  5. How does an enzymes affect a chemical reactions?
  1. a Electrolyte: substance that ionizes in a water solution
    Nonelectrolyte: organic compounds that dissolve in water, usually do not release ions.
  2. b Water
  3. c Atoms that gain or lose electrons because electrically charge.
  4. d DNA: molecules store the information for protein synthesis.
    RNA: molecules use this information to construct specific protein molecules.
  5. e 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.

5 Multiple choice questions

  1. 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. All matter is composed of fundamental substances.
  3. The solution at pH 6.4 has 100 times the hydrogen ion concentration of a solution at pH 8.42.
  4. 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.
  5. 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 True/False questions

  1. 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

          

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

          

  3. What is a molecular formula? A structural formula?Energy or atomic fragments they emit.

          

  4. Where are electrons, protons, and neutrons located within an atom?DNA: molecules store the information for protein synthesis.
    RNA: molecules use this information to construct specific protein molecules.

          

  5. Compare the characteristics of an acid, a base & a salt.DNA: molecules store the information for protein synthesis.
    RNA: molecules use this information to construct specific protein molecules.

          

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