USABO PRACTICE EXAM WITH GUARANTEED ACCURATE ANSWERS
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What enzyme does HIV use to convert RNA to DNA? - ACCURATE ANSWERS Reverse Transcriptase
The promoter region of a prokaryotic gene is located ______ to the gene and is the binding site for ______. - ACCURATE ANSWERS 5'...RNA polymerase
Which of the following is TRUE of prokaryotes?
I. Simul...
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USABO PRACTICE EXAM
USABO PRACTICE EXAM WITH GUARANTEED ACCURATE ANSWERS
What enzyme does HIV use to convert RNA to DNA? - ACCURATE
ANSWERS✔✔ Reverse Transcriptase
The promoter region of a prokaryotic gene is located ______ to the gene
and is the binding site for ______. - ACCURATE ANSWERS✔✔
5'...RNA polymerase
Which of the following is TRUE of prokaryotes?
I. Simultaneous transcription and translation
II. Presence of intron sequences
III. Circular DNA - ACCURATE ANSWERS✔✔ I and III only
,Integral transmembrane proteins are proteins imbedded in the cell
membrane. Which of the following amino acids would you MOST
expect to find in the transmembrane region of such proteins? -
ACCURATE ANSWERS✔✔ Tryptophan
When the base composition of DNA from bacterium Mycobacterium
tuberculosis was determined, 18% of the bases were found to be
adenine. What is the G + C content in M. tuberculosis? - ACCURATE
ANSWERS✔✔ 64%
The frequency of individuals affected with an autosomally recessive
inherited disorder is 1 in 4. Assuming that the population affected by this
disease is in Hardy-Weinberg equilibrium, what is the proportion of
carrier individuals in this population? - ACCURATE ANSWERS✔✔
50%
The velocity of action potential conduction across a nerve axon is
increased by the presence of the myelin sheath. In the peripheral nervous
system, what cell myelinates the axon? - ACCURATE ANSWERS✔✔
schwann cell
The cell bodies of afferent (sensory) nerves involved in somatic reflexes
are located in the - ACCURATE ANSWERS✔✔ Dorsal root ganglion
Rods and cones are associated with _____ and _____ vision,
respectively. - ACCURATE ANSWERS✔✔ Light/dark...color
,Populations that are likely to be living at a density near the limit of their
resources, are characterized as - ACCURATE ANSWERS✔✔ K-
selected
In many types of cancer, the function of the p53 gene is lost. Wild-type
p53 is MOST likely to be a - ACCURATE ANSWERS✔✔ tumor
suppressor
What glycolytic product is shuttled to the mitochondria in aerobic
respiration? - ACCURATE ANSWERS✔✔ Pyruvate
During human development, which process leads to the formation of
three germ layers? - ACCURATE ANSWERS✔✔ gastrulation
Telomerase is responsible for _____ the size of telomeres, and its
function is often ____ in carcinogenesis. - ACCURATE ANSWERS✔✔
maintaining ... increased
Which of the following is NOT a mode of natural selection? -
ACCURATE ANSWERS✔✔ sexual selection
Protostomes have _____ and _____ types of cleavage. - ACCURATE
ANSWERS✔✔ spiral ... determinate
Which of the following is NOT a characteristic of all chordates? -
ACCURATE ANSWERS✔✔ vertebrae
, In cardiac muscle, calcium ions can move freely between adjacent cells
through which of the following? - ACCURATE ANSWERS✔✔ gap
junctions
Unlike most polypeptide hormones, steroid hormones are unique in that
they - ACCURATE ANSWERS✔✔ Diffuse across cell membranes
In superoxide dismutase 1, an enzyme implicated in amyotrophic lateral
sclerosis (Lou Gehrig's disease), a copper ion is bound to the active site
and is important for enzyme activity. In this enzyme, copper most likely
functions as a(n) - ACCURATE ANSWERS✔✔ cofactor
The order of normal blood flow through the human heart is -
ACCURATE ANSWERS✔✔ right atrium, right ventricle, lungs, left
atrium, left ventricle, body
Allopatric speciation refers to species formed after which type of
separation: - ACCURATE ANSWERS✔✔ geographic
Which two functional groups are always found in amino acids? -
ACCURATE ANSWERS✔✔ Carboxyl and amine
Movement of ions across the membrane from higher to lower
concentrations through a channel protein is an example of - ACCURATE
ANSWERS✔✔ Facilitated diffusion
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