BL 150 Final Exam

Which is an example of a nonpolar covalent bond?

• The bond between two hydrogen atoms within one molecule of H_2.

• The bond formed when potassium (K) donates an electron to chlorine (Cl) to become charged K⁺ and Cl^-

• The bond formed between the oxygen and hydrogen of one water molecule (H₂O).

• The bond formed between complementary base pairs in DNA

Which is an example of an ionic bond?

• The bond between two hydrogen atoms within one molecule of H_2.

• The bond formed when potassium (K) donates an electron to chlorine (Cl) to become charged K⁺ and Cl^-

• The bond formed between the oxygen and hydrogen of one water molecule (H₂O).

• The bond formed between complementary base pairs in DNA

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Which is an example of a hydrogen bond?

• The bond between two hydrogen atoms within one molecule of H_2.

• The bond formed when potassium (K) donates an electron to chlorine (Cl) to become charged K⁺ and Cl^-

• The bond formed between the oxygen and hydrogen of one water molecule (H₂O).

• The bond formed between complementary base pairs in DNA

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Which is an example of a polar covalent bond?

• The bond between two hydrogen atoms within one molecule of H_2.

• The bond formed when potassium (K) donates an electron to chlorine (Cl) to become charged K⁺ and Cl^-

• The bond formed between the oxygen and hydrogen of one water molecule (H₂O).

• The bond formed between complementary base pairs in DNA

Which of the following elements forms four covalent bonds and is an important building block for all organic molecules?

• oxygen

• nitrogen

• sulfur

• carbon

• hydrogen

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Sodium hydroxide is a strong base. When dissolved in water, it will produce:

• an equal concentration of H+ and OH- ions

• a higher concentration of H+ than OH- ions

• a higher concentration of OH- than H+ ions

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In the molecule shown, which letter indicates a hydroxyl group? 

• A

• B

• C

• D

• E

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Water molecules are able to form hydrogen bonds because _____________.

• oxygen has two electrons in its outer shell

• the water molecule is shaped like a tetrahedron

• the hydrogen and oxygen unequally share electrons within the water molecule

• the hydrogen and oxygen atoms in water detach easily from each other

Which of the following statements concerning saturated fats are true?  Choose all and only those that apply. Points awarded for correct choices.  Points deducted for incorrect choices.

• 
  

  Saturated fats have multiple double bonds in the carbon chains of their fatty acids. 

• Saturated fats generally solidify at room temperature.

• 
  

  Saturated fats contain more hydrogen than unsaturated fats having the same number of carbon atoms. 

• Saturated fats are hydrophilic

Which of the following is a correct structural representation for the amino acid alanine, which has a –CH₃ group as its “R” group?

• A

• B

• C

• D

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