Free TEAS Science Practice Test
50 questions — the same length as the real ATI TEAS 7 Science section (44 scored, 60 minutes). The largest TEAS section. About 40% is anatomy & physiology, plus biology, chemistry and scientific reasoning.
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- Question 1 of 50Human Anatomy & PhysiologyA patient is placed on their right side with the left side facing upward for a dressing change. Which anatomical position is this?
- Question 2 of 50Human Anatomy & PhysiologyA premature newborn has respiratory distress syndrome due to insufficient surfactant. Which change in alveolar function most directly results from low surfactant levels?
- Question 3 of 50Human Anatomy & PhysiologyA nursing student is tracing the pathway of oxygenated blood after it leaves the lungs. Which structure carries oxygenated blood from the lungs back to the heart?
- Question 4 of 50Human Anatomy & PhysiologyA nurse is reviewing where most nutrient absorption occurs in the small intestine. Which digestive-tract region is the primary site for absorption of digested nutrients into the bloodstream and lymph?
- Question 5 of 50Human Anatomy & PhysiologyA patient touches a hot surface and withdraws the hand before consciously perceiving pain. Which neuron type is primarily responsible for integrating the sensory input and generating the immediate motor response in this reflex arc?
- Question 6 of 50Human Anatomy & PhysiologyDuring a musculoskeletal assessment, a nurse asks a student to identify the bony prominence on the posterior elbow where the triceps brachii tendon inserts. Which structure is this?
- Question 7 of 50Human Anatomy & PhysiologyA nurse explains that the hormone surge just before ovulation causes the oocyte to resume meiosis. Which oogenesis event is directly stimulated by the LH surge?
- Question 8 of 50Human Anatomy & PhysiologyA nurse is teaching a patient why a medication patch is placed on skin with adequate subcutaneous tissue. Which skin layer primarily contains adipose tissue that cushions the body and helps reduce heat loss?
- Question 9 of 50Human Anatomy & PhysiologyA patient with a history of recurrent bacterial infections is found to have low levels of immunoglobulins. Immunoglobulins are best classified as which type of protein by function?
- Question 10 of 50Human Anatomy & PhysiologyA patient has damage to the glomerular filtration barrier. Which substance would most likely begin appearing in the urine due to decreased size/charge selectivity during filtration?
- Question 11 of 50Human Anatomy & PhysiologyWhich immune cell type is part of the adaptive immune system and can differentiate into plasma cells that secrete antibodies?
- Question 12 of 50Human Anatomy & PhysiologyA nurse is reviewing differences between cartilage, bone, and dense connective tissue. Which statement best describes how cartilage is able to resist compressive forces?
- Question 13 of 50Human Anatomy & PhysiologyA provider makes an incision along the body’s midline to expose structures in a way that would separate the body into equal left and right halves. This incision most closely follows which anatomical plane?
- Question 14 of 50Human Anatomy & PhysiologyA patient develops metabolic alkalosis after prolonged vomiting. In systemic tissues, this change in blood pH would most directly affect oxygen transport by causing hemoglobin to:
- Question 15 of 50Human Anatomy & PhysiologyVenous blood from the brain most directly drains into which vessel after passing through the internal jugular vein?
- Question 16 of 50Human Anatomy & PhysiologyA patient has celiac disease with villous atrophy of the small intestine. Which process is most directly impaired, leading to nutrient deficiencies despite normal enzyme secretion?
- Question 17 of 50Human Anatomy & PhysiologyA nurse is teaching a patient about skin pigmentation. After melanin is produced in the skin, where is it most likely to be found forming a protective “cap” over the nucleus to reduce UV-related DNA damage?
- Question 18 of 50Human Anatomy & PhysiologyA nurse is reviewing anatomy for a patient with lateral hip pain. The gluteus medius muscle inserts on which bony landmark of the femur?
- Question 19 of 50Human Anatomy & PhysiologyA nurse is reviewing the male reproductive tract. Which structure is the primary site where sperm acquire progressive motility and are stored prior to ejaculation?
- Question 20 of 50Human Anatomy & PhysiologyA patient with vitiligo asks why their affected skin patches lose color even though the outer epidermal cells are still present. Which cell type is primarily responsible for producing the pigment that is later transferred to keratinocytes?
- Question 21 of 50BiologyA mutation prevents a cell from forming clathrin-coated pits at the plasma membrane. Which step of vesicular transport is most directly impaired?
- Question 22 of 50BiologyA nursing student is reviewing DNA base-pairing to understand how replication maintains genetic accuracy. In a double-stranded DNA molecule, adenine most commonly forms hydrogen bonds with which base on the opposite strand?
- Question 23 of 50BiologyA biomolecule is composed mainly of carbon, hydrogen, and oxygen, has a glycerol backbone bonded to three long hydrocarbon chains, and is used for long-term energy storage and insulation. Which macromolecule class best fits this description?
- Question 24 of 50BiologyA patient’s genetic report shows genotype EE for a gene in which allele E produces a functional enzyme that helps break down a specific medication, and allele e produces a nonfunctional enzyme. The patient is currently taking a drug that strongly inhibits this enzyme. Which statement best distinguishes the patient’s genotype from phenotype in this situation?
- Question 25 of 50BiologyWhich structure is present in many bacteria and helps them attach to host tissues, but is not found in viruses or prions?
- Question 26 of 50BiologyA patient has chronic asthma with increased mucus production in the bronchi. Which specialized cell type is primarily responsible for secreting mucus in the airway epithelium?
- Question 27 of 50BiologyDuring transcription, an mRNA strand is synthesized using a DNA template. If the DNA template sequence is 3′-T A C G G-5′, which mRNA sequence will be produced (written 5′ to 3′)?
- Question 28 of 50BiologyWhich carbohydrate is correctly classified as a polysaccharide?
- Question 29 of 50BiologyIn a family, an affected father and an unaffected mother have three children: two daughters and one son. Both daughters are affected, and the son is unaffected. The affected daughters later have children with unaffected partners; about half of each affected daughter’s sons and daughters are affected. Which inheritance pattern is MOST consistent with this information?
- Question 30 of 50BiologyA student is identifying boundary features on a diagram of an animal cell. Which structure is a carbohydrate-rich coating on the outside of the plasma membrane that helps with cell-to-cell recognition and adhesion?
- Question 31 of 50ChemistryA student is comparing how strongly different atoms attract shared electrons when forming polar covalent bonds in medications. Which element is expected to have the HIGHEST electronegativity?
- Question 32 of 50ChemistryA nurse notices that a drop of saline spreads more easily across a patient’s skin after soap is applied. Which intermolecular interaction best explains how soap helps water wet and spread over oily skin?
- Question 33 of 50ChemistryIn the single-replacement reaction , which species is reduced?
- Question 34 of 50ChemistryA patient has a genetic variant that reduces the activity of an enzyme in a metabolic pathway. Compared with the normal enzyme, the variant enzyme has a higher activation energy for the same reaction. Which statement best describes how this change affects the reaction and overall thermodynamics?
- Question 35 of 50ChemistryA nursing student is comparing two substances at room temperature. Which observation most strongly suggests a substance is primarily covalently bonded rather than ionically bonded?
- Question 36 of 50ChemistryA patient is hypoventilating for several minutes due to respiratory muscle fatigue. Which immediate change in the blood buffer system best explains the resulting drop in blood pH?
- Question 37 of 50ChemistryIn a renal physiology review, a student compares several ions that are isoelectronic (each has 10 electrons). Which ion is expected to have the LARGEST ionic radius?
- Question 38 of 50ChemistryFour pure liquids are compared at the same temperature. Which liquid is expected to have the LOWEST vapor pressure (evaporate the least), based on intermolecular forces?
- Question 39 of 50ChemistryWhat type of chemical reaction is shown?
- Question 40 of 50ChemistryIn a lab demonstration, the enzyme catalase is added to a solution of hydrogen peroxide under controlled conditions. Compared with the uncatalyzed reaction, which statement best describes the effect of catalase on the reaction?
- Question 41 of 50Scientific ReasoningA nursing student tests whether different doses of intranasal oxytocin affect breastfeeding milk let-down time in a simulation lab. Lactating volunteers receive either 0 IU (saline spray), 10 IU, or 20 IU oxytocin spray 10 minutes before pumping. All participants use the same pump model and settings, and pumping occurs in the same room at the same time of day. Each participant completes all three conditions on separate days. What is the dependent variable?
- Question 42 of 50Scientific ReasoningAfter a magnitude 6.0 earthquake occurs near a coastal city, a patient tells a nurse, “Scientists should be able to stop earthquakes if they really understood them.” Which statement best reflects the nature and limits of scientific knowledge?
- Question 43 of 50Scientific ReasoningA nursing student wants to visualize the internal ultrastructure of mitochondria (e.g., cristae) in a biopsy sample. Which microscope is most appropriate for this purpose?
- Question 44 of 50Scientific ReasoningA medical-surgical unit uses an early-warning scoring model to predict which patients are likely to deteriorate within the next 12 hours. Which action best addresses a key limitation of predictive models when applying them to real patients?
- Question 45 of 50Scientific ReasoningA nursing student investigates how the concentration of a disinfectant affects bacterial growth on agar plates. The student prepares plates with 0%, 1%, 2%, and 4% disinfectant, incubates all plates for 24 hours at the same temperature, and then measures the diameter of the clear zone (zone of inhibition) around each sample. Which correctly identifies the independent variable, dependent variable, and a control group?
- Question 46 of 50Scientific ReasoningA public health department uses a computer model to forecast next month’s heat-related emergency department visits. Which statement best describes the nature and limits of this scientific model?
- Question 47 of 50Scientific ReasoningA lab report lists the diameter of a ribosome as 25. Which unit is most appropriate to complete the measurement?
- Question 48 of 50Scientific ReasoningA nurse reads a study that uses a compartment model to predict how quickly a patient’s body temperature will change after receiving warmed IV fluids. Which statement best explains a key limitation to consider when using this model to make predictions?
- Question 49 of 50Scientific ReasoningA nurse researcher is testing whether a new probiotic taken daily for 4 weeks reduces the frequency of antibiotic-associated diarrhea in hospitalized adults receiving the same antibiotic. Which outcome should be measured as the dependent variable?
- Question 50 of 50Scientific ReasoningA student writes: "After a patient takes an over-the-counter antacid, their heartburn decreases within 30 minutes. Therefore, the antacid relieves heartburn by neutralizing stomach acid." Which statement is the reasoning?
0 of 50 answered · real test: 60 min
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