BIO 212 Test 1 Questions and Answers Fully Solved Latest Update 2025-2026
From its atomic number of 15, it is possible to predict that the phosphorus atom has - Answers
15 protons and 15 electrons
Which answer correctly ranks the atoms in terms of decreasing electronegativity (the highest
electronegativity first?) - Answers O, N, C, H
Which atom in the pictured molecule will have the strongest partial positive charge? - Answers
The C that's in C=O
Dr. Haxton says the O-O bond is polar and the C-C bond is nonpolar. A good student would say ...
a. Yes. O attracts electrons more strongly than C
b. Wrong again, Ralph. Both bonds are nonpolar
c. Right! O is electronegative, so O2 is polar
d. No way. C is more electronegative than O
e. No, both bonds are highly polar - Answers Wrong again, Ralph. Both bonds are nonpolar
Use your knowledge of electronegativity to pick out the most polar bond in the list below.
a. C-H
b. O-N
c. O-H
d. N-H
e. O-C - Answers O-H
O and H are at opposite ends of the electronegativity scale, so the polarity is very large
If you want a molecule that is highly polar, look for one that contains:
a. C-H
b. O-N
c. H-N
, d. S-H
e. C-S - Answers H-N
N and H differ in electronegativity more than any other bonded pair of atoms in the list, making
the N-H bond most polar
amino - Answers NH2
phosphate group - Answers one that contains phosphorus
hydroxyl group - Answers OH-
carboxyl group - Answers COOH
alchohol - Answers R-OH
is polar and makes compounds more soluble in water
which of the functional groups behaves as a base? - Answers amino group
Which of these groups is characteristic of thiols? - Answers -SH
Which of these groups plays a major role in energy transfer? - Answers Phosphate groups are a
component of ATP
carbonyl group - Answers C=O
Which functional groups can act as acids? - Answers carboxyl and phosphate
In a neutral solution the concentration of - Answers hydrogen ions is equal to the concentration
of hydroxide ions
What process exerts the pull on water molecules that is relayed from leaf to root via cohesion? -
Answers evaporation
The brackets are indicating a(n) _ bond - Answers hydrogen
A hydrogen atom with a net positive charge is attracted to an oxygen atom with a net negative
charge.
What name is given to the bond between water molecules? - Answers hydrogen
A hydrogen atom with a net positive charge is attracted to an oxygen atom with a net negative
charge.
From its atomic number of 15, it is possible to predict that the phosphorus atom has - Answers
15 protons and 15 electrons
Which answer correctly ranks the atoms in terms of decreasing electronegativity (the highest
electronegativity first?) - Answers O, N, C, H
Which atom in the pictured molecule will have the strongest partial positive charge? - Answers
The C that's in C=O
Dr. Haxton says the O-O bond is polar and the C-C bond is nonpolar. A good student would say ...
a. Yes. O attracts electrons more strongly than C
b. Wrong again, Ralph. Both bonds are nonpolar
c. Right! O is electronegative, so O2 is polar
d. No way. C is more electronegative than O
e. No, both bonds are highly polar - Answers Wrong again, Ralph. Both bonds are nonpolar
Use your knowledge of electronegativity to pick out the most polar bond in the list below.
a. C-H
b. O-N
c. O-H
d. N-H
e. O-C - Answers O-H
O and H are at opposite ends of the electronegativity scale, so the polarity is very large
If you want a molecule that is highly polar, look for one that contains:
a. C-H
b. O-N
c. H-N
, d. S-H
e. C-S - Answers H-N
N and H differ in electronegativity more than any other bonded pair of atoms in the list, making
the N-H bond most polar
amino - Answers NH2
phosphate group - Answers one that contains phosphorus
hydroxyl group - Answers OH-
carboxyl group - Answers COOH
alchohol - Answers R-OH
is polar and makes compounds more soluble in water
which of the functional groups behaves as a base? - Answers amino group
Which of these groups is characteristic of thiols? - Answers -SH
Which of these groups plays a major role in energy transfer? - Answers Phosphate groups are a
component of ATP
carbonyl group - Answers C=O
Which functional groups can act as acids? - Answers carboxyl and phosphate
In a neutral solution the concentration of - Answers hydrogen ions is equal to the concentration
of hydroxide ions
What process exerts the pull on water molecules that is relayed from leaf to root via cohesion? -
Answers evaporation
The brackets are indicating a(n) _ bond - Answers hydrogen
A hydrogen atom with a net positive charge is attracted to an oxygen atom with a net negative
charge.
What name is given to the bond between water molecules? - Answers hydrogen
A hydrogen atom with a net positive charge is attracted to an oxygen atom with a net negative
charge.
