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USABO Open Exam 2025 questions and CORRECT VERIFIED answers (graded A+) GUARANTEED PASS

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USABO Open Exam 2025 questions and CORRECT VERIFIED answers (graded A+) GUARANTEED PASS

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USABO OPEN EXAM 2025 QUESTIONS AND CORRECT VERIFIED ANSWERS (GRADED A+)
GUARANTEED PASS






Integrins - (ANSWER)Cell surface receptors for extracellular matrix proteins.



Actin - (ANSWER)Protein involved in cell motility and muscle contraction.



Myosin - (ANSWER)Motor protein involved in muscle contraction and cytokinesis.



Dynein - (ANSWER)Motor protein involved in intracellular transport and ciliary/flagellar movement.



Kinesin - (ANSWER)Motor protein involved in intracellular transport and mitotic spindle formation.



Cyclin - (ANSWER)Regulatory protein involved in cell cycle control.



Extracellular matrix - (ANSWER)Non-cellular component providing structural support and biochemical
signaling to surrounding cells.



Cytokinesis - (ANSWER)Division of the cytoplasm following nuclear division.



pKa - (ANSWER)Negative base-10 logarithm of the acid dissociation constant.



Oxidative phosphorylation - (ANSWER)Process of ATP synthesis in mitochondria using oxygen as the final
electron acceptor.



Frederick Griffith - (ANSWER)Discovered transformation through pneumococcal bacteria.



Hershey and Chase - (ANSWER)Confirmed DNA as the hereditary material using bacteriophages.



Chargaff - (ANSWER)Discovered the complementary base pairing in DNA.

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