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HESI A2 Biology Multiple Choice Questions and Answers | Latest Version | 2025/2026 | Correct & Verified

Which organelle is responsible for producing ATP through cellular respiration?

• Ribosome

✔✔B) Mitochondrion

• Golgi apparatus
• Lysosome

Which biomolecule is the primary source of quick energy for cells?✔✔A) Carbohydrates

• Proteins
• Lipids
• Nucleic acids

Which structure regulates the movement of substances into and out of the cell?

• Cytoplasm
• Nucleus 1 / 4

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✔✔C) Plasma membrane

• Ribosome

Which base pairs with adenine in DNA?

• Cytosine

✔✔B) Thymine

• Guanine
• Uracil

Which type of RNA carries amino acids to the ribosome during protein synthesis?

• mRNA

✔✔B) tRNA

• rRNA
• snRNA

What is the main function of chloroplasts in plant cells?

• Protein synthesis

✔✔B) Photosynthesis 2 / 4

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• Energy release from glucose
• Storage of genetic material

Which phase of the cell cycle involves DNA replication?✔✔A) S phase

• G1 phase
• G2 phase
• M phase

Which macromolecule stores genetic information?

• Protein
• Carbohydrate
• Lipid

✔✔D) Nucleic acid

Which part of the brain controls balance and coordination?

• Cerebrum

✔✔B) Cerebellum 3 / 4

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• Medulla oblongata
• Hypothalamus

Which of the following is an example of active transport?✔✔A) Sodium-potassium pump

• Diffusion
• Osmosis
• Facilitated diffusion

Which phase of meiosis leads to the separation of homologous chromosomes?✔✔A) Anaphase I

• Anaphase II
• Telophase I
• Prophase II

Which nitrogenous base is found only in RNA and not in DNA?

• Thymine

✔✔B) Uracil

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