[CliffsTestPrep] American BookWorks Corporation - CliffsTestPrep PCAT_ 5 Practice Tests (2006, Cliffs Notes)

PCAT Practice Test 1
Biology
59. Which of the following processes must occur in
order for an individual to express a particular
characteristic (for example, blue eye color)?
A. Genes must be transcribed directly into
proteins.
B. Genes must be transcribed onto tRNA and
then translated into proteins.
C. Genes must be transcribed onto mRNA and
then translated into proteins.
D. Genes must be translated directly into
proteins.
60. A DNA molecule that is composed of 30%
adenine molecules will also contain
A. 30% thymine molecules.
B. 70% thymine molecules.
C. 30% guanine molecules.
D. 30% cytosine molecules.
61. An organism that contains a segment of DNA
from a different organism inserted into its own
DNA is referred to as a
A. transgenic organism.
B. vector.
C. plasmid.
D. hybrid.
64. Which of the following is NOT a characteristic of
all living cells?
A. All cells are self-contained (surrounded by a
plasma membrane).
B. All cells contain DNA.
C. All cells contain a nucleus.
D. All cells contain cytoplasm.
65. Which of the following statements regarding cell
structure is FALSE?
A. Plant cells have chloroplasts, while animal
cells do not.
B. Animal cells have mitochondria, while plant
cells do not.
C. Animal cells lack cell walls surrounding
their plasma membranes.
D. Plant cells typically have a large central
vacuole, while animal cells typically have
one or more small vacuoles.
66. Which of the following cellular organelles serves
as the primary site of protein synthesis?
A. nucleus
B. mitochondria
C. ribosome
D. peroxisome
PCAT Practice Test 1
62. If a small amount of DNA (for example, a drop of
blood) is found at a crime scene, large quantities
of identical DNA can be produced for analysis
through the use of
A. DNA fingerprinting techniques.
B. restriction fragment length polymorphism
(RFLP) techniques.
C. DNA hybridization techniques.
D. polymerase chain reaction (PCR) techniques.
67. In humans, dermal tissue serves which of the
following functions?
A. provides the outer covering of the body
B. provides a defense mechanism against
invading microorganisms
C. serves as a sensory organ
D. all of the above
63. Which of the following statements best describes
the process of evolution?
A. changes in the genetic composition of a
population over time
B. natural selection
C. genetic drift
D. failure of a population to change in genetic
composition over time
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