Original ATI TEAS science practice with written answers. Try the free samples below. On the real exam the Science section has 50 questions.
Science is the largest and, for most applicants, the hardest section. Roughly a third of it is human anatomy and physiology — the organ systems and how they work together — with the rest covering life science (cells, genetics, basic biology), physical science (chemistry and physics basics), and scientific reasoning (designing and interpreting a simple experiment). Breadth is the challenge, so a systems-level map of the body beats memorising isolated facts.
Tap an answer to check it instantly. All 4 questions are free.
1. What is the primary function of red blood cells?
Answer: A. Red blood cells contain hemoglobin, which binds and transports oxygen to tissues. Fighting infection and producing antibodies are roles of white blood cells; clotting involves platelets.
2. The heart is the central organ of which body system?
Answer: B. The heart pumps blood through vessels, making it the central organ of the cardiovascular (circulatory) system.
3. Which cell organelle is primarily responsible for producing energy (ATP)?
Answer: C. The mitochondrion generates most of a cell's ATP through cellular respiration, which is why it is often called the powerhouse of the cell.
4. On the pH scale, a solution with a pH of 3 is best described as:
Answer: D. The pH scale runs from 0 to 14; values below 7 are acidic. A pH of 3 is acidic. Pure water is neutral at pH 7.
Nice work. Practise every section →
1. What is the primary function of red blood cells?
A. To carry oxygen to body tissuesB. To fight infectionC. To form blood clotsD. To produce antibodiesAnswer: A. Red blood cells contain hemoglobin, which binds and transports oxygen to tissues. Fighting infection and producing antibodies are roles of white blood cells; clotting involves platelets.
2. The heart is the central organ of which body system?
A. Respiratory systemB. Cardiovascular (circulatory) systemC. Digestive systemD. Nervous systemAnswer: B. The heart pumps blood through vessels, making it the central organ of the cardiovascular (circulatory) system.
3. Which cell organelle is primarily responsible for producing energy (ATP)?
A. NucleusB. RibosomeC. MitochondrionD. Golgi apparatusAnswer: C. The mitochondrion generates most of a cell's ATP through cellular respiration, which is why it is often called the powerhouse of the cell.
4. On the pH scale, a solution with a pH of 3 is best described as:
A. strongly basicB. neutralC. the same as pure waterD. acidicAnswer: D. The pH scale runs from 0 to 14; values below 7 are acidic. A pH of 3 is acidic. Pure water is neutral at pH 7.
5. Which of the following is a primary function of the skeletal system?
A. Providing structural support and protecting organsB. Producing digestive enzymesC. Filtering the bloodD. Regulating body temperature through sweatAnswer: A. The skeletal system supports the body and protects internal organs (for example, the skull protects the brain). The other functions belong to the digestive, urinary, and integumentary systems.
Yes. These sample Science questions are free with full explanations, and there is no sign-up. On the real ATI TEAS 7 the Science section has 50 questions.
Science is the largest and, for most applicants, the hardest section. Roughly a third of it is human anatomy and physiology — the organ systems and how they work together — with the rest covering life science (cells, genetics, basic biology), physical science (chemistry and physics basics), and scientific reasoning (designing and interpreting a simple experiment). Breadth is the challenge, so a systems-level map of the body beats memorising isolated facts.