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Bio 110 Final: Chapter 2

Usuario eliminado 10 preguntas Actualizado el 13 dic 2017

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Preguntas del test (10)

  1. 1___________________________________ make(s) up the nucleus of an atom.
    1. AProtons and electrons
    2. BProtons and neutrons
    3. CDNA and RNA
    4. DNeutrons and electrons
    5. EDNA only
  2. 2Living organisms are composed mainly of which atoms?
    1. Acalcium, hydrogen, nitrogen, and oxygen
    2. Bcarbon, hydrogen, nitrogen, and oxygen
    3. Chydrogen, nitrogen, oxygen, and helium
    4. Dcarbon, helium, nitrogen, and oxygen
    5. Ecarbon, calcium, hydrogen, and oxygen
  3. 3The ability of an atom to attract electrons in a bond with another atom is termed its
    1. Ahydrophobicity
    2. Belectronegativity
    3. Csolubility
    4. Dvalence
    5. Eboth a and b
  4. 4Hydrogen bonds differ from covalent bonds in that
    1. Acovalent bonds can form between any type of atom, and hydrogen bonds form only between H and O.
    2. Bcovalent bonds involve sharing of electrons, and hydrogen bonds involve the complete transfer of electrons
    3. Ccovalent bonds result from equal sharing of electrons, but hydrogen bonds involve unequal sharing of electrons.
    4. Dcovalent bonds involve sharing of electrons between atoms, but hydrogen bonds are the result of weak attractions between a hydrogen atom of a polar molecule and an electronegative atom of another polar molecule.
    5. Ecovalent bonds are weak bonds that break easily, but hydrogen ions are strong links between atoms that are not easily broken.
  5. 5A free radical
    1. Ais a positively charged ion.
    2. Bis an atom with one unpaired electron in its outer shell.
    3. Cis a stable atom that is not bonded to another atom
    4. Dcan cause considerable cellular damage
    5. Eboth b and d.
  6. 6Chemical reactions in living organisms
    1. Arequire energy to begin
    2. Busually require a catalyst to speed up the process
    3. Care usually reversible
    4. Doccur in liquid environments, such as water.
    5. Eall of the above
  7. 7Solutes that easily dissolve in water are said to be
    1. Ahydrophobic
    2. Bhydrophilic
    3. Cpolar molecules
    4. Dall of the above
    5. Eb and c only
  8. 8The molecular mass of glucose is about 180 g/mol. If 45g of glucose is dissolved into a final volume of 0.5L of water, what is the molarity of the solution?
    1. A0.125M
    2. B0.25M
    3. C0.5M
    4. D1.0M
    5. E2.0M
  9. 9The sum of the atomic masses of all the atoms of a molecule is its
    1. Aatomic weight
    2. Bmolarity
    3. Cmolecular mass
    4. Dconcentration
    5. Epolarity
  10. 10Reactions in which water is used to break apart other molecules are known as ___________________ reactions.
    1. Ahydrophilic
    2. Bhydrophobic
    3. Cdehydration
    4. Danabolic
    5. Ehydrolysis

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El usuario ha eliminado su información de asignaturas Test sobre Bio 110 Final: Chapter 2, creado por Usuario eliminado el 12/12/2017.
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Usuario eliminado
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English
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Creado el 12 dic 2017 · actualizado el 13 dic 2017

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