AP Biology: Unit 1: Chemistry of Life

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Question 1 · Unit 1: Chemistry of Life · foundation

Which property of water helps explain its cohesion?A. Covalent bonds form between separate water molecules.B. Hydrogen bonds form between neighboring water molecules.C. Water molecules have no partial charges.D. Water molecules cannot interact with one another.

Question 9 · Unit 1: Chemistry of Life · standard

Two proteins have identical amino acid sequences but are placed in solutions with different pH values. Their activities differ. Which explanation is most plausible?A. pH changes the genetic code in every cell.B. Different pH can change side-chain charges and protein folding.C. Identical sequences guarantee identical shape in all conditions.D. Every pH change breaks all peptide bonds.

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