2026 USABO Open Practice Exam study
guide COMPLETE PRACTICE EXAM
Questions and Correct Answers
(Verified) (Latest Update 2026) Already
Graded A+ | Guaranteed Pass | Brand
New Version!!!!!!
Integrins - CORRECT ANSWER Cell surface receptors for extracellular matrix proteins.
Actin - CORRECT ANSWER Protein involved in cell motility and muscle contraction.
Myosin - CORRECT ANSWER Motor protein involved in muscle contraction and cytokinesis.
Dynein - CORRECT ANSWER Motor protein involved in intracellular transport and
ciliary/flagellar movement.
Kinesin - CORRECT ANSWER Motor protein involved in intracellular transport and mitotic
spindle formation.
Cyclin - CORRECT ANSWER Regulatory protein involved in cell cycle control.
, Extracellular matrix - CORRECT ANSWER Non-cellular component providing structural support
and biochemical signaling to surrounding cells.
Cytokinesis - CORRECT ANSWER Division of the cytoplasm following nuclear division.
pKa - CORRECT ANSWER Negative base-10 logarithm of the acid dissociation constant.
Oxidative phosphorylation - CORRECT ANSWER Process of ATP synthesis in mitochondria using
oxygen as the final electron acceptor.
Frederick Griffith - CORRECT ANSWER Discovered transformation through pneumococcal
bacteria.
Hershey and Chase - CORRECT ANSWER Confirmed DNA as the hereditary material using
bacteriophages.
Chargaff - CORRECT ANSWER Discovered the complementary base pairing in DNA.
Watson and Crick - CORRECT ANSWER Proposed the double-helix structure of DNA.
Meselson and Stahl - CORRECT ANSWER Demonstrated semi-conservative replication of DNA.
Transmembrane protein - CORRECT ANSWER Protein spanning the cell membrane and
facilitating molecular transport.
Transmembrane domain - CORRECT ANSWER Region of a transmembrane protein that crosses
the lipid bilayer.
guide COMPLETE PRACTICE EXAM
Questions and Correct Answers
(Verified) (Latest Update 2026) Already
Graded A+ | Guaranteed Pass | Brand
New Version!!!!!!
Integrins - CORRECT ANSWER Cell surface receptors for extracellular matrix proteins.
Actin - CORRECT ANSWER Protein involved in cell motility and muscle contraction.
Myosin - CORRECT ANSWER Motor protein involved in muscle contraction and cytokinesis.
Dynein - CORRECT ANSWER Motor protein involved in intracellular transport and
ciliary/flagellar movement.
Kinesin - CORRECT ANSWER Motor protein involved in intracellular transport and mitotic
spindle formation.
Cyclin - CORRECT ANSWER Regulatory protein involved in cell cycle control.
, Extracellular matrix - CORRECT ANSWER Non-cellular component providing structural support
and biochemical signaling to surrounding cells.
Cytokinesis - CORRECT ANSWER Division of the cytoplasm following nuclear division.
pKa - CORRECT ANSWER Negative base-10 logarithm of the acid dissociation constant.
Oxidative phosphorylation - CORRECT ANSWER Process of ATP synthesis in mitochondria using
oxygen as the final electron acceptor.
Frederick Griffith - CORRECT ANSWER Discovered transformation through pneumococcal
bacteria.
Hershey and Chase - CORRECT ANSWER Confirmed DNA as the hereditary material using
bacteriophages.
Chargaff - CORRECT ANSWER Discovered the complementary base pairing in DNA.
Watson and Crick - CORRECT ANSWER Proposed the double-helix structure of DNA.
Meselson and Stahl - CORRECT ANSWER Demonstrated semi-conservative replication of DNA.
Transmembrane protein - CORRECT ANSWER Protein spanning the cell membrane and
facilitating molecular transport.
Transmembrane domain - CORRECT ANSWER Region of a transmembrane protein that crosses
the lipid bilayer.
