|
|
94' SBIOA Exam
|
|
| 93
Exam Part A: M/C Part B: Short Answers Part C: Essay Question 94 Exam 95
Exam 97
Exam
|
Part A: Multiple Choices Page
1 Page
2 Page
3 Page 4
1. The number of electrons that an atom must acquire, lose, or
share, to reach a stable outer configuration is called its
a.
combining capacity (valence).
b.
electronegativity.
c.
bond energy.
d.
isotope.
e.
mass number. 2.
All the atoms of a given element contain, within their nuclei,
the same number of
a.
protons and neutrons.
b.
neutrons.
c.
electrons and neutrons.
d.
protons.
e.
electrons and protons. 3.
Atoms of a single element which have a different number of
neutrons in the nucleus are called
a.
isotopes.
b.
ions.
c.
electronegative atoms.
d.
electropositive atoms.
e.
isomers. 4.
In which of the following functional groups would you find a
hydrogen atom bonded to a nitrogen atom?
a.
carboxyl
b.
amino
c.
carbonyl
d.
hydroxyl
e.
sulfhydryl 5.
Some of the following might be characteristics of an acid.
I. It is a proton donor.
II. It is a proton acceptor.
III. It reacts with a base to produce a salt.
IV. It consists of a solution of hydronium ions and ions of a
non‑metal.
V. It can participate in a neutralization reaction
to produce a base.
Which of the following groupings is correct?
a.
I, III, and V
b.
I, III, and IV
c.
II, III, and IV
d.
III, IV, and V
e.
II, IV, and V 6.
Buffers in living organisms
a.
maintain cytoplasm in a fluid condition.
b.
maintain pH in the cells within a narrow range, allowing
enzymes to function efficiently.
c.
allow the pH of cells to change without affecting the action of
the enzymes.
d.
neutralize the effect of enzymes.
e.
prevent charged particles from entering the cells. 7.
What type of chemical reaction is illustrated by the following
reaction?
C6H12O6 + 6H2O + 6O2
‑‑‑‑> 12H2O + 6CO2
a.
hydrolysis
b.
substitution
c.
oxidation‑reduction
d.
neutralization
e.
dehydration synthesis (condensation) 8.
A transfer of electrons from one atom to another results in a
bond which is
a.
covalent.
b.
a peptide.
c.
polyvalent.
d.
isotopic.
e.
ionic. 9.
The C‑H bond is a very important chemical bond, present in
many biochemical molecules. The
bond could be described as:
a.
a strong ionic bond.
b.
a hydrogen bond.
c.
a covalent bond.
d.
a weak ionic bond.
e.
both ionic and covalent. 10.
Which
of the following is NOT a polymer?
a.
protein
b.
fat
c.
RNA
d.
starch
<-93 Exam --- Page1 --- Page 2->
|
