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USABO Bundled Exams with Complete Solution | Verified Answers | 2024
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USABO Bundled Exams with Complete Solution | Verified Answers | 2024
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USABO Open Exam 2024 | 100% Correct Answers | Verified | Latest 2024 Version
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Why is myelin important in the nervous system? 
A. It allows signals to travel faster along axons because depolarization occurs only at myelinated 
locations. 
B. It allows signals to travel faster along axons because depolarization occurs only at nonmyelinated 
locations. 
C. It bundles the dendrites of adjacent neurons together. 
D. It increases capacitance across the cell membrane, which helps electrical signals to leave the axons. 
E. It traps neurotransmitters, increasing their concentratio...
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USABO TOP Exam Guide Questions and CORRECT Answers
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Eukaryote - An organism whose cells contain complex structures enclosed within 
membranes. The defining membrane bound structure thats sets them apart from prokaryotic 
cells is the nucleas or nuclear envelope within which the genetic material is carried. All 
species of large complex species are eukaryotes, including animals, plants and funghi. 
Euchromatin - This shows as pale areas in the nucleas under electro magnification. It is 
a less densly packed form of chromatin; 10% is even less ...
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USABO UPDATED Exam Questions and CORRECT Answers
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iodine deficiency - goiter 
ethane - C2H6 
propane - C3H8 
butane - C4H10 
methane - CH4 
enantiomers - mirror image isomers 
hydroxyl - -OH
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USABO TOP Study Guide Questions and CORRECT Answers
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What enzyme does HIV use to convert RNA to DNA? - Reverse Transcriptase 
The promoter region of a prokaryotic gene is located ______ to the gene and is the binding 
site for ______. - 5'...RNA polymerase 
Which of the following is TRUE of prokaryotes? 
I. Simultaneous transcription and translation 
II. Presence of intron sequences 
III. Circular DNA - I and III only 
Integral transmembrane proteins are proteins imbedded in the cell membrane. Which of the 
following amino acids would you MO...
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USABO Certification Exam Questions and CORRECT Answers
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The cell bodies of afferent (sensory) nerves involved in somatic reflexes are located in the - 
dorsal root ganglion 
efferent fibers (motor) are located in the - ventral root ganglion 
Integral (transmembrane) proteins - -the majority of proteins; they extend entirely 
through the membrane 
-tryptophan is primary amino acid 
In the absence of active transport, the passive sodium and potassium ion fluxes across the 
plasma membrane are still coupled. What makes these two passive ion fluxes dep...
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USABO Practice Correctly Answered Questions pack UpToDate | Already Graded A+
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USABO Practice Correctly Answered Questions pack UpToDate | Already Graded A+
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USABO-Review Correctly Answered Questions| UpToDate | Already Graded A+
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insterstitial fluid 
: fluid located between cells and among tissues 
cuboidal epithelium 
: cube shaped epithelial cells that function in secretion, and are located in various 
endocrine glands 
simple columnar epithelium 
: lines intestines, secretes digestive juices and absorbs nutrients, one cell thick 
pseudostratified ciliated columnar epithelium 
: forms a mucous membrane in portions of the respiratory tract; contains cilia that 
move the film of mucous 
stratified squamous epithelium 
...
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USABO Correctly Answered Questions| UpToDate | Already Graded A+
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Eukaryote 
: An organism whose cells contain complex structures enclosed within 
membranes. The defining membrane bound structure thats sets them apart from 
prokaryotic cells is the nucleas or nuclear envelope within which the genetic material is 
carried. All species of large complex species are eukaryotes, including animals, plants 
and funghi. 
Euchromatin 
: This shows as pale areas in the nucleas under electro magnification. It is a less 
densly packed form of chromatin; 10% is even l...
-
USABO 2022 mass deck Correctly Answered Questions| UpToDate | Already Graded A+
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Mycorrhizae 
: Symbiotic organisms (aka symbionts) with plants that live on their roots, helping 
the plant gain nutrients 
Nerve net 
: A nervous system that moves neural signals in all directions from the stimuli, 
found in invertebrates like hydra 
Malpighian tubules 
: Tubes in an insect that help with osmoregulation and excretion; they move waste 
into the main gut for removal. "Kidneys" of arthropods, they absorb ammonium and 
convert it into uric acid, then into the main gut for rem...
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USABO Open Exam Correctly Answered Questions| UpToDate | Already Graded A+
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Both amino acids and nucleotides form complex chains. Select all the 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. 
: C. Both contain nitrogen. 
E. The sequence of chains both form from preexisting templates. 
When a population is in Hardy-Weinberg equilibrium, which of th...
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USABO Practice Correctly Answered Questions | UpToDate | Already Graded A+
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What enzyme does HIV use to convert RNA to DNA? 
: Reverse Transcriptase 
The promoter region of a prokaryotic gene is located ______ to the gene and is the 
binding site for ______. 
: 5'...RNA polymerase 
Which of the following is TRUE of prokaryotes? 
I. Simultaneous transcription and translation 
II. Presence of intron sequences 
III. Circular DNA 
: I and III only 
Integral transmembrane proteins are proteins imbedded in the cell membrane. Which of 
the following amino acids would you...