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Hesi A2 Biology - Basics, Water, and Molecules Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
What is the main function of enzymes in biological systems?✔✔They speed up chemical reactions by lowering activation energy.
Why is water considered a polar molecule?✔✔Because it has a partial positive charge on hydrogen and a partial negative charge on oxygen.
What property of water allows it to move upward in plant stems through capillary action?✔✔Cohesion and adhesion.
What is the primary building block of proteins?✔✔Amino acids.
Which molecule is the main source of quick energy for cells?✔✔Glucose. 1 / 2
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Why does ice float on liquid water?✔✔Because ice has a lower density due to hydrogen bond spacing.
What type of bond forms between two water molecules?✔✔Hydrogen bond.
What is the universal solvent in biology?✔✔Water.
What type of macromolecule stores genetic information?✔✔Nucleic acids.
What elements are found in carbohydrates?✔✔Carbon, hydrogen, and oxygen.
Which property of water helps regulate Earth’s climate?✔✔High specific heat capacity.
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