94' SBIOA Exam
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93
Exam Part A: M/C Part B: Short Answers Part C: Essay Question 94 Exam 95
Exam 97
Exam
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Part A: Multiple Choices Page
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11.
The
synthesis of carbohydrates, fats, and proteins from smaller units
involves the
a.
temporary bonding to DNA.
b.
removal of nitrogen.
c.
removal of water.
d.
addition of water.
e.
production of ATP. 12.
The
great diversity of structure in proteins is mainly due to
a.
different numbers, kinds, and sequences of amino acids.
b.
different kinds of bonds between successive amino acids.
c.
the action of the ribosomes.
d.
the precise location of specific amino acids, common to all
proteins.
e.
the disulphide and hydrogen bonds which determine molecular
shape. 13.
In
using the analogy of a key and a lock to explain enzyme action,
I.
the key is analogous to the enzyme and the lock to the substrate.
II.
the key is analogous to the substrate and the lock to the enzyme.
III.
the stem of the key is analogous to the protein part of an
enzyme.
IV.
the stem of the key is analogous to the non‑protein part of
the enzyme.
V.
a key which will open only one lock is analogous to an enzyme
which has a high degree of specificity.
Which of the above statements are correct?
a.
II, III, and V
b.
I and III only
c.
I, IV, and V
d.
II and IV only
e.
I, III, and V 14.
All
but one of the following are functions of proteins within a cell.
Which one is NOT a function of proteins?
a.
switching genes on and off
b.
providing structure
c.
controlling osmosis
d.
catalyzing chemical change
e.
facilitating active transport 15.
Which
of the following is NOT true about enzymes?
a.
They function best at specific temperatures but break down at
high temperatures.
b.
Some enzymes require activators.
c.
They are essential to the metabolism of cells for the conversion
of energy.
d.
They function best at a particular pH.
e.
They undergo a major chemical change after reacting with
their specific substrate. 16.
Many
individuals of the same species living together in a defined area form
a/an
a.
community.
b.
genus.
c.
population.
d.
ecosystem.
e.
variety. 17.
When
two different species overlap in the same biological niche, they are
a.
unaffected by one another.
b.
dependent on one another.
c.
in co‑operation with one another.
d.
in competition with one another.
e.
dependent on different food supplies. 18.
The
progressive series of changes that eventually produce a climax community
on what was once a bare rocky island is an example of
a.
speciation.
b.
primary succession.
c.
secondary succession.
d.
evolution.
e.
eutrophication. 19.
The
sequence of energy flow through a food chain is
a.
primary consumers‑ producers‑ higher order consumers.
b.
higher order consumers‑ primary consumers‑ producers.
c.
primary consumers‑ higher order consumers‑ producers.
d.
producers‑ higher order consumers‑ primary consumers.
e.
producers‑ primary consumers‑ higher order
consumers. 20.
In
a terrestrial ecosystem, the trophic level that would contain the
largest biomass would be the
a.
producers.
b.
highest order consumers.
c.
primary consumers.
d.
secondary consumers.
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