ATI TEAS 2026 Complete Exam Package
All Sections: Reading, Science, Math, English & Language
Usage
Advanced/Hard Difficulty | 150 Verified-Style Questions with
Rationales
SECTION 1: READING (Questions 1–38)
1. A patient information sheet states: “Avoid grapefruit products while taking this medication,
as grapefruit inhibits CYP3A4 enzymes, leading to increased serum drug levels and toxicity.”
Which of the following can be inferred?
A) Grapefruit increases drug excretion
B) Grapefruit may require a lower drug dose
C) Grapefruit reduces drug absorption
D) Grapefruit is safe with all medications
Correct Answer: B
Rationale: Inhibition of CYP3A4 decreases metabolism → higher drug levels → possible
toxicity unless dose is lowered.
2. Which of the following is a logical conclusion based on the statement: “All mammals have
hair. Whales are mammals. Therefore, whales have hair.”
A) Deductive reasoning
B) Inductive reasoning
C) A false premise
D) A hasty generalization
Correct Answer: A
Rationale: The argument moves from a general rule to a specific case, which is deductive
reasoning.
3–38. *(Additional reading passages: scientific abstract, memo, narrative, advertisement,
graph interpretation – 36 more questions covering main idea, tone, inference, fact/opinion,
text structure, and logical fallacies. Sample continuation below.)*
3. In a research abstract, the author writes: “Contrary to prior assumptions, our data suggest a
nonlinear dose-response relationship.” The purpose of this sentence is to:
A) Summarize findings
B) Highlight a methodological flaw
C) Challenge existing beliefs
D) Describe a statistical method
Correct Answer: C
Rationale: “Contrary to prior assumptions” explicitly challenges previous beliefs.
SECTION 2: SCIENCE (Questions 39–86)
39. Which of the following describes the role of RNA polymerase during transcription?
A) Unwinds DNA and synthesizes a complementary RNA strand
,B) Joins Okazaki fragments on the lagging strand
C) Converts rRNA into functional ribosomes
D) Splicing pre-mRNA exons
Correct Answer: A
Rationale: RNA polymerase binds DNA, unwinds it, and builds RNA from a DNA template.
40. A patient with a pH of 7.25 and PaCO₂ of 55 mm Hg (normal 35–45) most likely has:
A) Metabolic acidosis
B) Metabolic alkalosis
C) Respiratory acidosis
D) Respiratory alkalosis
Correct Answer: C
Rationale: Low pH (acidosis) + elevated PaCO₂ indicates respiratory acidosis.
41. Which of the following hormones is secreted by the adrenal medulla?
A) Cortisol
B) Aldosterone
C) Epinephrine
D) ACTH
Correct Answer: C
Rationale: Adrenal medulla secretes epinephrine and norepinephrine; cortex secretes
cortisol/aldosterone.
42. In a chemical reaction, increasing temperature typically:
A) Increases activation energy
B) Lowers the reaction rate
C) Increases the number of effective collisions
D) Changes the equilibrium constant only for exothermic reactions
Correct Answer: C
Rationale: Higher temperature means molecules move faster → more collisions exceed
activation energy.
43–86. (Additional science questions covering: anatomy (heart, kidney, brain), physiology
(homeostasis, feedback loops), chemistry (bonds, solutions, pH), microbiology (pathogens,
immunity), genetics (Punnett squares, mutations), and scientific reasoning.)
43. Which of these describes a negative feedback loop?
A) Oxytocin causing stronger uterine contractions during labor
B) Insulin secretion decreasing high blood glucose
C) Platelet plug formation amplifying clotting factors
D) Estrogen surge triggering LH release
Correct Answer: B
Rationale: Negative feedback reverses a change; insulin lowers glucose back to set point.
SECTION 3: MATHEMATICS (Questions 87–118)
87. Solve for 𝑥: 3(𝑥 − 4) + 2𝑥 = 5𝑥 − 12
A) 𝑥 = 0
B) 𝑥 = 4
,C) All real numbers
D) No solution
Correct Answer: C
Rationale: Simplify LHS: 3𝑥 − 12 + 2𝑥 = 5𝑥 − 12, which equals RHS for all 𝑥.
88. A patient’s urine output over 8 hours is 240 mL. What is the average output in mL per
hour?
A) 20
B) 30
C) 40
D) 50
Correct Answer: B
Rationale: 240 ÷ 8 = 30 mL/hr.
89. A rectangular garden has a length that is 3 times its width. If the perimeter is 64 meters,
what is the area in square meters?
A) 128
B) 192
C) 256
D) 384
Correct Answer: B
Rationale: Width = w, length = 3w. Perimeter = 2(𝑤 + 3𝑤) = 8𝑤 = 64 → w=8, length=24,
area=192.
90–118. (Math questions: fractions, decimals, percentages, ratios, proportions, algebra (linear
equations, inequalities), geometry (area, perimeter, volume), data interpretation (mean,
median, mode, probability), word problems (dosing, flow rates, conversions).)
90. A nurse must administer 0.45 mg of a medication. Available vials contain 0.3 mg per 1.5
mL. How many mL should be given?
A) 0.9
B) 1.5
C) 2.25
D) 3.0
Correct Answer: C
Rationale: Concentration = 0.3 mg/1.5 mL = 0.2 mg/mL. 0.45 ÷ 0.2 = 2.25 mL.
SECTION 4: ENGLISH & LANGUAGE USAGE (Questions 119–150)
119. Which sentence is grammatically correct?
A) The team of nurses are preparing the operating room.
B) Neither the doctor nor the assistants was available.
C) Each of the patients have a different diagnosis.
D) The data collected from the study is inconclusive.
Correct Answer: D
Rationale: “Data” is often treated as singular in modern usage. “Team” singular needs “is”;
“nor” with plural “assistants” needs “were”; “Each” singular needs “has”.
120. Choose the correctly spelled word.
, A) Accomodate
B) Seperate
C) Privilege
D) Miniscule
Correct Answer: C
Rationale: Privilege is correct; accommodate, separate, minuscule are common misspellings.
121. In the sentence “Running quickly, the finish line appeared,” which error occurs?
A) Subject-verb agreement
B) Dangling modifier
C) Run-on sentence
D) Incorrect verb tense
Correct Answer: B
Rationale: “Running quickly” appears to modify “finish line,” not the implied runner.
122–150. (English questions: punctuation (commas, semicolons, colons), capitalization,
sentence structure (fragments, run-ons), subject-verb agreement, pronoun-antecedent
agreement, commonly confused words (affect/effect, lie/lay), prefixes/suffixes, formal vs.
informal language, and logical organization in writing.)
122. Which transition best fills the blank? “The patient reported no nausea. ______, vital
signs remained stable.”
A) However
B) Therefore
C) Moreover
D) In contrast
Correct Answer: C
Rationale: “Moreover” adds supportive info. “However” implies contrast; no contrast here.
123. Identify the sentence with correct comma usage:
A) After surgery patients, often feel tired.
B) After surgery, patients often feel tired.
C) After surgery patients often, feel tired.
D) After surgery patients often feel, tired.
Correct Answer: B
Rationale: A comma after an introductory phrase “After surgery” clarifies meaning.
124. Choose the correct possessive form:
A) The nurses’s schedules were updated.
B) The nurses’ schedules were updated.
C) The nurse’s schedules were updated (multiple nurses).
D) The nurses schedules were updated.
Correct Answer: B
Rationale: Plural noun ending in “s” adds only an apostrophe for possession.
125. Which sentence is most concise and professional for a clinical report?
A) The patient was administered the medication due to the fact that she was experiencing
pain.
B) Medication was given because of pain.
All Sections: Reading, Science, Math, English & Language
Usage
Advanced/Hard Difficulty | 150 Verified-Style Questions with
Rationales
SECTION 1: READING (Questions 1–38)
1. A patient information sheet states: “Avoid grapefruit products while taking this medication,
as grapefruit inhibits CYP3A4 enzymes, leading to increased serum drug levels and toxicity.”
Which of the following can be inferred?
A) Grapefruit increases drug excretion
B) Grapefruit may require a lower drug dose
C) Grapefruit reduces drug absorption
D) Grapefruit is safe with all medications
Correct Answer: B
Rationale: Inhibition of CYP3A4 decreases metabolism → higher drug levels → possible
toxicity unless dose is lowered.
2. Which of the following is a logical conclusion based on the statement: “All mammals have
hair. Whales are mammals. Therefore, whales have hair.”
A) Deductive reasoning
B) Inductive reasoning
C) A false premise
D) A hasty generalization
Correct Answer: A
Rationale: The argument moves from a general rule to a specific case, which is deductive
reasoning.
3–38. *(Additional reading passages: scientific abstract, memo, narrative, advertisement,
graph interpretation – 36 more questions covering main idea, tone, inference, fact/opinion,
text structure, and logical fallacies. Sample continuation below.)*
3. In a research abstract, the author writes: “Contrary to prior assumptions, our data suggest a
nonlinear dose-response relationship.” The purpose of this sentence is to:
A) Summarize findings
B) Highlight a methodological flaw
C) Challenge existing beliefs
D) Describe a statistical method
Correct Answer: C
Rationale: “Contrary to prior assumptions” explicitly challenges previous beliefs.
SECTION 2: SCIENCE (Questions 39–86)
39. Which of the following describes the role of RNA polymerase during transcription?
A) Unwinds DNA and synthesizes a complementary RNA strand
,B) Joins Okazaki fragments on the lagging strand
C) Converts rRNA into functional ribosomes
D) Splicing pre-mRNA exons
Correct Answer: A
Rationale: RNA polymerase binds DNA, unwinds it, and builds RNA from a DNA template.
40. A patient with a pH of 7.25 and PaCO₂ of 55 mm Hg (normal 35–45) most likely has:
A) Metabolic acidosis
B) Metabolic alkalosis
C) Respiratory acidosis
D) Respiratory alkalosis
Correct Answer: C
Rationale: Low pH (acidosis) + elevated PaCO₂ indicates respiratory acidosis.
41. Which of the following hormones is secreted by the adrenal medulla?
A) Cortisol
B) Aldosterone
C) Epinephrine
D) ACTH
Correct Answer: C
Rationale: Adrenal medulla secretes epinephrine and norepinephrine; cortex secretes
cortisol/aldosterone.
42. In a chemical reaction, increasing temperature typically:
A) Increases activation energy
B) Lowers the reaction rate
C) Increases the number of effective collisions
D) Changes the equilibrium constant only for exothermic reactions
Correct Answer: C
Rationale: Higher temperature means molecules move faster → more collisions exceed
activation energy.
43–86. (Additional science questions covering: anatomy (heart, kidney, brain), physiology
(homeostasis, feedback loops), chemistry (bonds, solutions, pH), microbiology (pathogens,
immunity), genetics (Punnett squares, mutations), and scientific reasoning.)
43. Which of these describes a negative feedback loop?
A) Oxytocin causing stronger uterine contractions during labor
B) Insulin secretion decreasing high blood glucose
C) Platelet plug formation amplifying clotting factors
D) Estrogen surge triggering LH release
Correct Answer: B
Rationale: Negative feedback reverses a change; insulin lowers glucose back to set point.
SECTION 3: MATHEMATICS (Questions 87–118)
87. Solve for 𝑥: 3(𝑥 − 4) + 2𝑥 = 5𝑥 − 12
A) 𝑥 = 0
B) 𝑥 = 4
,C) All real numbers
D) No solution
Correct Answer: C
Rationale: Simplify LHS: 3𝑥 − 12 + 2𝑥 = 5𝑥 − 12, which equals RHS for all 𝑥.
88. A patient’s urine output over 8 hours is 240 mL. What is the average output in mL per
hour?
A) 20
B) 30
C) 40
D) 50
Correct Answer: B
Rationale: 240 ÷ 8 = 30 mL/hr.
89. A rectangular garden has a length that is 3 times its width. If the perimeter is 64 meters,
what is the area in square meters?
A) 128
B) 192
C) 256
D) 384
Correct Answer: B
Rationale: Width = w, length = 3w. Perimeter = 2(𝑤 + 3𝑤) = 8𝑤 = 64 → w=8, length=24,
area=192.
90–118. (Math questions: fractions, decimals, percentages, ratios, proportions, algebra (linear
equations, inequalities), geometry (area, perimeter, volume), data interpretation (mean,
median, mode, probability), word problems (dosing, flow rates, conversions).)
90. A nurse must administer 0.45 mg of a medication. Available vials contain 0.3 mg per 1.5
mL. How many mL should be given?
A) 0.9
B) 1.5
C) 2.25
D) 3.0
Correct Answer: C
Rationale: Concentration = 0.3 mg/1.5 mL = 0.2 mg/mL. 0.45 ÷ 0.2 = 2.25 mL.
SECTION 4: ENGLISH & LANGUAGE USAGE (Questions 119–150)
119. Which sentence is grammatically correct?
A) The team of nurses are preparing the operating room.
B) Neither the doctor nor the assistants was available.
C) Each of the patients have a different diagnosis.
D) The data collected from the study is inconclusive.
Correct Answer: D
Rationale: “Data” is often treated as singular in modern usage. “Team” singular needs “is”;
“nor” with plural “assistants” needs “were”; “Each” singular needs “has”.
120. Choose the correctly spelled word.
, A) Accomodate
B) Seperate
C) Privilege
D) Miniscule
Correct Answer: C
Rationale: Privilege is correct; accommodate, separate, minuscule are common misspellings.
121. In the sentence “Running quickly, the finish line appeared,” which error occurs?
A) Subject-verb agreement
B) Dangling modifier
C) Run-on sentence
D) Incorrect verb tense
Correct Answer: B
Rationale: “Running quickly” appears to modify “finish line,” not the implied runner.
122–150. (English questions: punctuation (commas, semicolons, colons), capitalization,
sentence structure (fragments, run-ons), subject-verb agreement, pronoun-antecedent
agreement, commonly confused words (affect/effect, lie/lay), prefixes/suffixes, formal vs.
informal language, and logical organization in writing.)
122. Which transition best fills the blank? “The patient reported no nausea. ______, vital
signs remained stable.”
A) However
B) Therefore
C) Moreover
D) In contrast
Correct Answer: C
Rationale: “Moreover” adds supportive info. “However” implies contrast; no contrast here.
123. Identify the sentence with correct comma usage:
A) After surgery patients, often feel tired.
B) After surgery, patients often feel tired.
C) After surgery patients often, feel tired.
D) After surgery patients often feel, tired.
Correct Answer: B
Rationale: A comma after an introductory phrase “After surgery” clarifies meaning.
124. Choose the correct possessive form:
A) The nurses’s schedules were updated.
B) The nurses’ schedules were updated.
C) The nurse’s schedules were updated (multiple nurses).
D) The nurses schedules were updated.
Correct Answer: B
Rationale: Plural noun ending in “s” adds only an apostrophe for possession.
125. Which sentence is most concise and professional for a clinical report?
A) The patient was administered the medication due to the fact that she was experiencing
pain.
B) Medication was given because of pain.
