Original HESI A2 biology practice with written answers. Try the free samples below, then practise every section in the full timed exam.
Biology focuses on the foundations: the cell and its parts, cellular respiration and photosynthesis, metabolism, the major molecules of life, basic genetics and DNA, and how living things are classified. These are the building blocks a nursing science sequence assumes you already understand, so a clear grasp of each concept pays off later.
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1. Which organelle is the primary site of ATP production through aerobic respiration in eukaryotic cells?
Answer: B. Mitochondria carry out the citric acid cycle and oxidative phosphorylation, generating most of the cell's ATP.
2. A human somatic cell with 46 chromosomes undergoes mitosis. How many chromosomes will each daughter cell contain?
Answer: B. Mitosis produces two genetically identical diploid daughter cells, each with the same chromosome number as the parent (46).
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1. Which organelle is the primary site of ATP production through aerobic respiration in eukaryotic cells?
A. Golgi apparatusB. MitochondrionC. LysosomeD. Rough endoplasmic reticulumAnswer: B. Mitochondria carry out the citric acid cycle and oxidative phosphorylation, generating most of the cell's ATP.
2. A human somatic cell with 46 chromosomes undergoes mitosis. How many chromosomes will each daughter cell contain?
A. 23B. 46C. 92D. 69Answer: B. Mitosis produces two genetically identical diploid daughter cells, each with the same chromosome number as the parent (46).
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Biology focuses on the foundations: the cell and its parts, cellular respiration and photosynthesis, metabolism, the major molecules of life, basic genetics and DNA, and how living things are classified. These are the building blocks a nursing science sequence assumes you already understand, so a clear grasp of each concept pays off later.