Biology 110 Lecture Exam 1 Questions
with Verified Answers
Grade I got on this exam with these answers: 32/35
(3 of these answers are wrong) - ANSWERSn/a
If a carbon has 4 bonds and has no net electrical charge, what is true of the atom? -
ANSWERSit has the same # of electrons as protons
A C-C bond is what type of bond? (polarity, bond type) - ANSWERSnonpolar, covalent
A C-O bond is what type of bond? (polarity, bond type) - ANSWERSpolar, covalent
In the molecule C2H3O2 (acetate), there are 3 hydrogens positioned around a central
carbon. The 4th bond to the central carbon is made to another carbon, which is double
bonded to one oxygen and single bonded to one oxygen.
If the hydrogen atoms around the central carbon are labeled 1, 2, and 3 going counter-
clockwise starting with 1 at the top, which atom would be most likely to be able to
participate in a hydrogen bond? - ANSWERSI got this question wrong by answering
Hydrogen #2.
What would be the net electrical charge of an atom with 5 protons, 5 neutrons, and 4
electrons be? - ANSWERS+1
In the bonding of NaCl, chlorine "steals" and electron from sodium. What describes this
chemical attraction? - ANSWERSan ionic bond
Put these in order from smallest to largest in size:
viruses, atoms, macromolecules, prokaryotic cells, eukaryotic cells - ANSWERSatoms,
macromolecules, viruses, prokaryotic cells, eukaryotic cells
Using electronegativities (given on the test), which of the following is nonpolar?
a) Se-Cl
b) C-Cl
c) B-Cl
d) C-Se2
e) more information is needed - ANSWERSd) C-Se2
Which of the following characterizes a single water molecule?
with Verified Answers
Grade I got on this exam with these answers: 32/35
(3 of these answers are wrong) - ANSWERSn/a
If a carbon has 4 bonds and has no net electrical charge, what is true of the atom? -
ANSWERSit has the same # of electrons as protons
A C-C bond is what type of bond? (polarity, bond type) - ANSWERSnonpolar, covalent
A C-O bond is what type of bond? (polarity, bond type) - ANSWERSpolar, covalent
In the molecule C2H3O2 (acetate), there are 3 hydrogens positioned around a central
carbon. The 4th bond to the central carbon is made to another carbon, which is double
bonded to one oxygen and single bonded to one oxygen.
If the hydrogen atoms around the central carbon are labeled 1, 2, and 3 going counter-
clockwise starting with 1 at the top, which atom would be most likely to be able to
participate in a hydrogen bond? - ANSWERSI got this question wrong by answering
Hydrogen #2.
What would be the net electrical charge of an atom with 5 protons, 5 neutrons, and 4
electrons be? - ANSWERS+1
In the bonding of NaCl, chlorine "steals" and electron from sodium. What describes this
chemical attraction? - ANSWERSan ionic bond
Put these in order from smallest to largest in size:
viruses, atoms, macromolecules, prokaryotic cells, eukaryotic cells - ANSWERSatoms,
macromolecules, viruses, prokaryotic cells, eukaryotic cells
Using electronegativities (given on the test), which of the following is nonpolar?
a) Se-Cl
b) C-Cl
c) B-Cl
d) C-Se2
e) more information is needed - ANSWERSd) C-Se2
Which of the following characterizes a single water molecule?
