DNA helicase breaks which type of bond in the DNA molecule?
A) Covalent bonds
B) Hydrogen bonds
C) Ionic bonds
D) Peptide bonds
B
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Males never give an X chromosome to any of their sons
a. True b. False Indicate whether the statement is true or false
In cell signal propagation, what does dimerization do?
a. moves water across the plasma membrane in large quantities b. allows activated receptors to interact extracellularly with the surrounding environment c. enables the intracellular domains of the receptors to activate each other d. shuts down the signaling pathway
Vertebrate colonization of terrestrial habitats
increased dramatically with the evolution of a. lungs. b. paired appendages. c. shelled eggs. d. the four-chambered heart. e. scales.
Muscles produce and resist movement
Indicate whether the statement is true or false