USABO Exam Questions With 100%
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In the extracellular matrix of an animal cell, you would like to test
the binding partner of integrins in vitro. Integrins would most likely
require firm attachment to which of the above option? -
correct answer ✅Actin
You are working with Dr. Lee at University of Wisconsin-Madison to
investigate cytokinesis in a newly discovered marine worm. You
generated antibodies to conserved proteins involved in cell division
in other organism to look for proteins that localize to important
structures during cell division. What molecular motor protein
should you look for in the contractile ring? -
correct answer ✅Myosin
An unnamed acid has a pKa value of 4.76. Which of the following is
closest to the ratio of the concentration of its protonated to
deprotonated forms in a pH environment of 6.8? -
correct answer ✅1:100
Select the answer choice that correctly describes which chemical
species are oxidized, reduced, and phosphorylated in the process of
oxidative phosphorylation. -
correct answer ✅Oxidized: NADH & FADH2
Reduced: O2
, USABO Exam Questions With 100%
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Phosphorylated: ADP
Which scientist(s) is incorrectly matched with his/her/their
discoveries?
A. Frederick Griffith - discovery of transformation through
bacteriophages.
B. Hershey and Chase - discovery of DNA as the hereditary material
of cells. C. Chargaff - discovery that relative amounts of nucleotide
bases varies among organisms.
D. Watson and Crick - discovery of the double-helix structure of
DNA.
E. Meselson and Stahl - discovery of the semi-conservative
replication of DNA. -
correct answer ✅Frederick Griffith - discovery of transformation
through bacteriophages.
You discover a transmembrane protein ALPHA that, like most
transmembrane proteins, exhibits a transmembrane domain
composed of alpha helices. You next discover that ALPHA serves as
a channel. What is a likely amino acid sequence for some portion of
the transmembrane domain? (See chart below for one-letter
abbreviations).
Verified Answers
In the extracellular matrix of an animal cell, you would like to test
the binding partner of integrins in vitro. Integrins would most likely
require firm attachment to which of the above option? -
correct answer ✅Actin
You are working with Dr. Lee at University of Wisconsin-Madison to
investigate cytokinesis in a newly discovered marine worm. You
generated antibodies to conserved proteins involved in cell division
in other organism to look for proteins that localize to important
structures during cell division. What molecular motor protein
should you look for in the contractile ring? -
correct answer ✅Myosin
An unnamed acid has a pKa value of 4.76. Which of the following is
closest to the ratio of the concentration of its protonated to
deprotonated forms in a pH environment of 6.8? -
correct answer ✅1:100
Select the answer choice that correctly describes which chemical
species are oxidized, reduced, and phosphorylated in the process of
oxidative phosphorylation. -
correct answer ✅Oxidized: NADH & FADH2
Reduced: O2
, USABO Exam Questions With 100%
Verified Answers
Phosphorylated: ADP
Which scientist(s) is incorrectly matched with his/her/their
discoveries?
A. Frederick Griffith - discovery of transformation through
bacteriophages.
B. Hershey and Chase - discovery of DNA as the hereditary material
of cells. C. Chargaff - discovery that relative amounts of nucleotide
bases varies among organisms.
D. Watson and Crick - discovery of the double-helix structure of
DNA.
E. Meselson and Stahl - discovery of the semi-conservative
replication of DNA. -
correct answer ✅Frederick Griffith - discovery of transformation
through bacteriophages.
You discover a transmembrane protein ALPHA that, like most
transmembrane proteins, exhibits a transmembrane domain
composed of alpha helices. You next discover that ALPHA serves as
a channel. What is a likely amino acid sequence for some portion of
the transmembrane domain? (See chart below for one-letter
abbreviations).
