CST Biology UPDATED ACTUAL Questions and CORRECT Answers
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Course
CST Biology
Institution
CST Biology
CST Biology UPDATED ACTUAL
Questions and CORRECT Answers
In most stable freshwater environments,
populations of Daphnia are almost entirely female and reproduce asexually. However, males
are observed in low oxygen environments or when food is scarce. Based on these
observations, a researche...
CST Biology UPDATED ACTUAL
Questions and CORRECT Answers
In most stable freshwater environments,
populations of Daphnia are almost entirely female and reproduce asexually. However, males
are observed in low oxygen environments or when food is scarce. Based on these
observations, a researcher suggests that male Daphnia develop in response to unfavorable
environmental conditions. This is an example of a
A result.
B theory.
C procedure.
D hypothesis. - CORRECT ANSWER✔✔- B theory
Two students were testing the amount of
fertilizer that would best promote the growth of strawberries in a garden. Which of the
following could be an unavoidable source of experimental error?
A length of the study
B variation in the strawberry plants
C the cost of watering the plants
D fertilization during the study - CORRECT ANSWER✔✔- D fertilization during the study
Which of the following best describes the use of
population models in biology?
A They are generally easy to construct.
B They can represent reality precisely.
C They are used when no observations have
been made. D They can help predict outcomes. - CORRECT ANSWER✔✔- A They are
generally easy to construct
A computer model of cellular mitosis
,can simulate the aspects of cellular division quite well. However, microscopic observation of
actual cellular mitosis can improve understanding because actual observations
A may reveal greater unknown complexities.
B are easier than a computer model to view.
C are the same each time.
D may provide division events in sequence. - CORRECT ANSWER✔✔- A may reveal
greater unknown complexities.
After a volcanic eruption has covered an area
with lava, which of the following is the most likely order of succession in the repopulation of
the area?
A lichens →grasses →shrubs →trees
B mosses →grasses →lichens →trees
C grasses →trees →mosses →lichens
D shrubs →grasses →trees →lichens - CORRECT ANSWER✔✔- A lichens-grasses-shrubs-
trees
Which information was most important to the development of genetic engineering
techniques?
A the observation of nondominant alleles
B the discovery of lethal genes
C the formulation of Punnett squares
D the structure of a DNA molecule - CORRECT ANSWER✔✔- D the structure of a DNA
molecule
The cell membrane of the red blood cell
will allow water, oxygen, carbon dioxide, and glucose to pass through. Because other
substances are blocked from entering, this membrane is called
A perforated.
B semi-permeable.
C non-conductive.
D permeable. - CORRECT ANSWER✔✔- B semi-permeable
, The plasma membrane of a cell consists of
A protein molecules arranged in two layers with polar areas forming the outside of the
membrane.
B two layers of lipids organized with the nonpolar tails forming the interior of the membrane.
C lipid molecules positioned between two carbohydrate layers.
D protein - CORRECT ANSWER✔✔- B two layers of lipids organized with the nonpolar
tails forming the interior of the membrane
What causes tomatoes to ripen much more
slowly in a refrigerator than they do if left on a table at room temperature?
A Tomatoes need sunlight to ripen.
B Humidity accelerates the ripening process.
C Low temperatures reduce the action of
ripening enzymes.
D Enzymes produced by bacteria inhibit ripening. - CORRECT ANSWER✔✔- C Low
temperatures reduce the action of ripening enzymes
There are many different enzymes located in
the cytoplasm of a single cell. How is a specific
enzyme able to catalyze a specific reaction?
A Different enzymes are synthesized in specific areas of the cytoplasm.
B Most enzymes can catalyze many different reactions.
C An enzyme binds to a specific substrate (reactant) for the reaction catalyzed.
D Enzymes are transported to specific substrates (reactants) by ribosomes. - CORRECT
ANSWER✔✔- C An enzyme binds to specific substrate (reactant) for the reaction catalyzed.
Some snake venoms are harmful because they
contain enzymes that destroy blood cells or tissues. The damage caused by such a snakebite
could best be slowed by
A applying ice to the bite area.
B drinking large amounts of water.
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