02/07/2025, 11:10 USABO Open Exam 2025 COMPREHENSIVE QUESTIONS WITH MULTIPLE CHOICES |VERIFIED & REVISED ANSWERS (NE…
USABO Open Exam 2025 COMPREHENSIVE
QUESTIONS WITH MULTIPLE CHOICES |VERIFIED
& REVISED ANSWERS (NEW) 2025
Save
Terms in this set (48)
Both amino acids and C. Both contain nitrogen.
nucleotides form complex E. The sequence of chains both form from preexisting
chains. Select all the templates.
answers below that are
accurate.
A. The chains formed by
both have polar
phosphate groups.
B. Both contain peptide
bonds.
C. Both contain nitrogen.
D. The chains formed by
both can be lysed by
trypsin.
E. The sequence of chains
both form from
preexisting templates.
https://quizlet.com/1058098252/usabo-open-exam-2025-comprehensive-questions-with-multiple-choices-verified-revised-answers-new-2025-flash-ca… 1/39
,02/07/2025, 11:10 USABO Open Exam 2025 COMPREHENSIVE QUESTIONS WITH MULTIPLE CHOICES |VERIFIED & REVISED ANSWERS (NE…
When a population is in E. The frequencies of genotypes in the population are
Hardy-Weinberg stable over time.
equilibrium, which of the
following is true?
A. All of its recessive lethal
genes are wiped out,
leaving only healthy
dominant genes.
B. dN/dt = 0, N =
population size.
C. Mutations occur at five
times the normal rate to
balance the loss of genes
by way of natural
selection.
D. The frequencies of the
alleles in the population
change over time.
E. The frequencies of
genotypes in the
population are stable over
time.
https://quizlet.com/1058098252/usabo-open-exam-2025-comprehensive-questions-with-multiple-choices-verified-revised-answers-new-2025-flash-ca… 2/39
,02/07/2025, 11:10 USABO Open Exam 2025 COMPREHENSIVE QUESTIONS WITH MULTIPLE CHOICES |VERIFIED & REVISED ANSWERS (NE…
Which of the following is C. The 3D shape of a protein is determined largely by
NOT an accurate its amino acid sequence.
description of protein
synthesis and folding?
A. All protein synthesis is
initiated in the cytoplasm.
B. Many copies of a
protein can be
synthesized
simultaneously from the
same mRNA.
C. The 3D shape of a
protein is determined
largely by its amino acid
sequence.
D. The entire chain of
amino acids exits the
ribosome before it begins
folding into its 3D shape.
E. The first encoded amino
acid in every protein is
methionine.
https://quizlet.com/1058098252/usabo-open-exam-2025-comprehensive-questions-with-multiple-choices-verified-revised-answers-new-2025-flash-ca… 3/39
, 02/07/2025, 11:10 USABO Open Exam 2025 COMPREHENSIVE QUESTIONS WITH MULTIPLE CHOICES |VERIFIED & REVISED ANSWERS (NE…
Neurotransmitter released A. Metabotropic receptors that do not form an ion
at the synapse binds to pore are linked with signal transduction mechanisms
two classes of receptors. and can alter neuron function for seconds to minutes.
Select the correct D. Ionotropic receptors that are directly linked to an
response(s). ion pore and are opened within milliseconds in
response to neurotransmitter.
A. Metabotropic
receptors that do not form
an ion pore are linked with
signal transduction
mechanisms and can alter
neuron function for
seconds to minutes.
B. Receptor tyrosine
kinases that activate signal
transduction mechanisms
and change gene
transcription that can last
for hours to days.
C. Ionotropic receptors
that do not form an ion
pore are linked with signal
transduction mechanisms
and can alter neuron
function for seconds to
minutes.
D. Ionotropic receptors
that are directly linked to
an ion pore and are
opened within
milliseconds in response
to neurotransmitter.
E. Steroid hormone
receptors that can activate
changes in gene
transcription that can last
for hours to days.
https://quizlet.com/1058098252/usabo-open-exam-2025-comprehensive-questions-with-multiple-choices-verified-revised-answers-new-2025-flash-ca… 4/39
USABO Open Exam 2025 COMPREHENSIVE
QUESTIONS WITH MULTIPLE CHOICES |VERIFIED
& REVISED ANSWERS (NEW) 2025
Save
Terms in this set (48)
Both amino acids and C. Both contain nitrogen.
nucleotides form complex E. The sequence of chains both form from preexisting
chains. Select all the templates.
answers below that are
accurate.
A. The chains formed by
both have polar
phosphate groups.
B. Both contain peptide
bonds.
C. Both contain nitrogen.
D. The chains formed by
both can be lysed by
trypsin.
E. The sequence of chains
both form from
preexisting templates.
https://quizlet.com/1058098252/usabo-open-exam-2025-comprehensive-questions-with-multiple-choices-verified-revised-answers-new-2025-flash-ca… 1/39
,02/07/2025, 11:10 USABO Open Exam 2025 COMPREHENSIVE QUESTIONS WITH MULTIPLE CHOICES |VERIFIED & REVISED ANSWERS (NE…
When a population is in E. The frequencies of genotypes in the population are
Hardy-Weinberg stable over time.
equilibrium, which of the
following is true?
A. All of its recessive lethal
genes are wiped out,
leaving only healthy
dominant genes.
B. dN/dt = 0, N =
population size.
C. Mutations occur at five
times the normal rate to
balance the loss of genes
by way of natural
selection.
D. The frequencies of the
alleles in the population
change over time.
E. The frequencies of
genotypes in the
population are stable over
time.
https://quizlet.com/1058098252/usabo-open-exam-2025-comprehensive-questions-with-multiple-choices-verified-revised-answers-new-2025-flash-ca… 2/39
,02/07/2025, 11:10 USABO Open Exam 2025 COMPREHENSIVE QUESTIONS WITH MULTIPLE CHOICES |VERIFIED & REVISED ANSWERS (NE…
Which of the following is C. The 3D shape of a protein is determined largely by
NOT an accurate its amino acid sequence.
description of protein
synthesis and folding?
A. All protein synthesis is
initiated in the cytoplasm.
B. Many copies of a
protein can be
synthesized
simultaneously from the
same mRNA.
C. The 3D shape of a
protein is determined
largely by its amino acid
sequence.
D. The entire chain of
amino acids exits the
ribosome before it begins
folding into its 3D shape.
E. The first encoded amino
acid in every protein is
methionine.
https://quizlet.com/1058098252/usabo-open-exam-2025-comprehensive-questions-with-multiple-choices-verified-revised-answers-new-2025-flash-ca… 3/39
, 02/07/2025, 11:10 USABO Open Exam 2025 COMPREHENSIVE QUESTIONS WITH MULTIPLE CHOICES |VERIFIED & REVISED ANSWERS (NE…
Neurotransmitter released A. Metabotropic receptors that do not form an ion
at the synapse binds to pore are linked with signal transduction mechanisms
two classes of receptors. and can alter neuron function for seconds to minutes.
Select the correct D. Ionotropic receptors that are directly linked to an
response(s). ion pore and are opened within milliseconds in
response to neurotransmitter.
A. Metabotropic
receptors that do not form
an ion pore are linked with
signal transduction
mechanisms and can alter
neuron function for
seconds to minutes.
B. Receptor tyrosine
kinases that activate signal
transduction mechanisms
and change gene
transcription that can last
for hours to days.
C. Ionotropic receptors
that do not form an ion
pore are linked with signal
transduction mechanisms
and can alter neuron
function for seconds to
minutes.
D. Ionotropic receptors
that are directly linked to
an ion pore and are
opened within
milliseconds in response
to neurotransmitter.
E. Steroid hormone
receptors that can activate
changes in gene
transcription that can last
for hours to days.
https://quizlet.com/1058098252/usabo-open-exam-2025-comprehensive-questions-with-multiple-choices-verified-revised-answers-new-2025-flash-ca… 4/39
