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Biology HESI A2 Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
Which macromolecule is primarily used for long-term energy storage in animals?✔✔Lipids store energy and provide insulation.
Which organelle is responsible for protein synthesis in a cell?✔✔Ribosomes translate mRNA into amino acid chains.
What is the basic structural and functional unit of life?✔✔The cell is the smallest unit capable of independent life.
Which process produces gametes with half the chromosome number?✔✔Meiosis ensures genetic diversity in offspring.
Which organelle contains digestive enzymes to break down cellular waste?✔✔Lysosomes recycle macromolecules and damaged organelles.
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Which process moves water across a semipermeable membrane?✔✔Osmosis balances solute concentrations in and out of cells.
Which molecule carries genetic instructions from DNA to ribosomes?✔✔mRNA conveys the code for protein synthesis.
Which nitrogenous base pairs with adenine in DNA?✔✔Thymine forms hydrogen bonds with adenine.
Which structure gives plant cells rigidity and shape?✔✔The cell wall is composed mainly of cellulose.
Which organelle generates ATP through cellular respiration?✔✔Mitochondria produce energy for the cell.
Which type of RNA transports amino acids to the ribosome?✔✔tRNA delivers amino acids during translation.
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Which pigment is essential for photosynthesis in plants?✔✔Chlorophyll absorbs light energy to produce glucose.
Which type of junction allows direct communication between adjacent cells?✔✔Gap junctions permit passage of ions and small molecules.
Which cytoskeletal structure provides tracks for vesicle transport?✔✔Microtubules assist in intracellular movement.
Which organelle is responsible for modifying and packaging proteins for export?✔✔Golgi apparatus processes proteins and lipids.
Which organelle stores water, nutrients, and waste products in plant cells?✔✔The central vacuole maintains turgor pressure.
Which process converts glucose into pyruvate in the cytoplasm?✔✔Glycolysis generates ATP and pyruvate for cellular respiration.
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