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MCAT® Exam practice questions

248 free questions with answers and explanations.

Practice test
  1. 151.A marketing researcher is conducting a focus group for a new energy drink. During the discussion, one participant enthusiastically praises the drink, claiming it gives them 'unprecedented focus and energy.' Following this statement, several other participants, who had previously been noncommittal or mildly positive, begin to express similar, more intense positive sentiments, often echoing the initial participant's claims. This shift in the group's expressed opinions is most consistent with which social psychological phenomenon?Critical Analysis and Reasoning Skills
  2. 152.Passage: The concept of 'moral relativism' asserts that moral judgments are true or false only relative to some particular standpoint, such as a cultural or individual perspective, and that no single standpoint is uniquely privileged over others. For example, if a culture believes that eating meat is morally wrong, then for members of that culture, eating meat is morally wrong, and there is no objective, universal moral truth that overrides this cultural belief. This contrasts with moral absolutism, which holds that there are universal moral principles that apply to everyone, everywhere. Consider a society where it is considered morally acceptable for individuals to harvest organs from deceased family members without explicit prior consent, provided the family agrees. A visitor from another society, where explicit consent is always required, argues that this practice is inherently immoral. From the perspective of moral relativism, which of the following is the most accurate statement regarding this situation?Critical Analysis and Reasoning Skills
  3. 153.A technician is troubleshooting a complex machine. They systematically test each component in a linear fashion, starting from the power supply and moving through the system's various modules until the faulty part is identified. This diagnostic approach, characterized by breaking down the problem into sequential, manageable steps, is an example of:Critical Analysis and Reasoning Skills
  4. 154.A city council is debating whether to fund a new public park. One council member argues that since the city already has several parks, and the existing ones are not always at full capacity, there is no real 'need' for another. This argument, by focusing solely on existing capacity rather than potential new demand or alternative benefits, might be overlooking which aspect of urban planning?Critical Analysis and Reasoning Skills
  5. 155.A community outreach program aims to reduce littering by placing prominent signs that say, 'Most people in this community dispose of their waste properly.' After implementing these signs, surveys indicate a decrease in littering behavior. This intervention strategy is most likely leveraging which principle of social psychology?Critical Analysis and Reasoning Skills
  6. 156.A research team is studying the impact of a new educational program on student performance. They observe that students who voluntarily enroll in the program show significantly higher test scores than those who do not. However, the researchers are concerned that this observed difference might not solely be due to the program's effectiveness, but rather to an inherent motivation difference between the two groups. This concern best reflects an awareness of which common research challenge?Critical Analysis and Reasoning Skills
  7. 157.A physician is evaluating a patient presenting with symptoms that could indicate either a common infection or a rare autoimmune disorder. Given the patient's demographic information, the physician initially leans towards the common infection, despite some atypical findings. This initial diagnostic inclination, based on the prevalence of the conditions, best exemplifies which cognitive bias?Critical Analysis and Reasoning Skills
  8. 158.Passage: The Sapir-Whorf hypothesis posits that the structure of a language affects its speakers' worldview or cognition. There are two main versions: the strong version, which states that language determines thought, and the weaker version, which argues that language influences thought. For example, cultures with many words for 'snow' might perceive snow differently than cultures with only one word. An anthropologist observes that a particular indigenous group, whose language lacks specific terms for 'past' and 'future' and instead uses spatial metaphors to describe events (e.g., 'behind me' for past events, 'in front of me' for future events), also tends to exhibit a cultural focus on the present moment, with less emphasis on long-term planning or historical record-keeping. This observation provides the strongest support for which aspect of the Sapir-Whorf hypothesis?Critical Analysis and Reasoning Skills
  9. 159.A team of researchers is developing a new diagnostic test for a rare disease. They conduct a study where 100 individuals known to have the disease and 100 healthy individuals are tested. The test correctly identifies 95 of the diseased individuals and incorrectly identifies 5 of the healthy individuals as having the disease. Which of the following best describes the ability of the test to correctly identify individuals who do not have the disease?Critical Analysis and Reasoning Skills
  10. 160.Passage: The placebo effect is a phenomenon in which a patient's physical or mental health appears to improve after taking a 'treatment' that has no pharmacological effect. This improvement is not due to the treatment itself but to the patient's belief in the treatment or the expectation of improvement. The nocebo effect is the opposite: a patient's health worsens due to negative expectations about a treatment or situation, even if the treatment is inert or harmless. A clinical trial administers a new pain medication to one group and a sugar pill to a control group. Both groups are told they might experience mild nausea as a side effect. Even though the sugar pill has no active ingredients, a significant number of patients in the control group report experiencing nausea. This outcome is best described as an example of the:Critical Analysis and Reasoning Skills
  11. 161.A historian is analyzing primary sources from the American Civil War. They notice that many accounts from soldiers on both sides, while differing in their political justifications, often share remarkably similar descriptions of the physical hardships, the psychological toll of combat, and the camaraderie among troops. The historian attributes this similarity to the shared human experience of warfare, transcending ideological divides. This approach to understanding human behavior across different contexts is most aligned with which perspective?Critical Analysis and Reasoning Skills
  12. 162.Passage: In linguistics, a 'false cognate' refers to a pair of words in different languages that seem to be cognates (i.e., they look or sound similar and appear to have related meanings) but actually do not share a common etymological origin. For example, the English word 'much' and the Spanish word 'mucho' (meaning 'much' or 'a lot') are true cognates, both deriving from Proto-Indo-European *megʰ-. However, the English word 'embarrassed' and the Spanish word 'embarazada' (meaning 'pregnant') are false cognates, as they developed from different linguistic roots. Based on the passage, which of the following pairs is most likely a false cognate?Critical Analysis and Reasoning Skills
  13. 163.A medical student is analyzing a research paper that concludes a new drug significantly reduces symptom severity. However, the study only included participants from a single, highly specialized clinic, all of whom shared a very similar demographic profile. Which of the following concepts best describes a potential limitation of this study's findings?Critical Analysis and Reasoning Skills
  14. 164.A marketing team is designing a new advertisement for a health drink. They decide to emphasize that '9 out of 10 doctors recommend this product for daily hydration.' However, they omit the information that the survey was conducted among doctors who already specialize in sports medicine and regularly endorse hydration products. This omission, while not a direct lie, leverages which of the following cognitive biases to persuade consumers?Critical Analysis and Reasoning Skills
  15. 165.A group of friends is discussing their recent vacation to a new city. One friend, recounting their experience at a particular restaurant, states, 'That place was amazing! The service was impeccable, the food was gourmet, and the ambiance was perfect.' Another friend, who visited the same restaurant, agrees wholeheartedly, adding, 'Yes, I felt the same way! It was truly a five-star experience.' However, a third friend, who had a less positive experience at the same restaurant, remains silent and does not voice their dissenting opinion. What social psychological phenomenon is most likely at play with the third friend's silence?Critical Analysis and Reasoning Skills
  16. 166.A participant in a psychological experiment is asked to recall a list of words. They remember the first few words and the last few words on the list much better than the words in the middle. This phenomenon is an example of which of the following cognitive biases?Critical Analysis and Reasoning Skills
  17. 167.A patient reports experiencing a sudden, intense sensation of fear, accompanied by heart palpitations, shortness of breath, dizziness, and a feeling of impending doom. These episodes occur unpredictably and reach a peak within minutes. After ruling out medical causes, a psychiatrist notes that the patient has experienced several such episodes and is now constantly worried about having another one, leading to avoidance of certain situations. What is the most appropriate diagnosis?Psychological, Social, and Biological Foundations of Behavior
  18. 168.A student is investigating the properties of a hypothetical element, 'X', which has an electron configuration ending in 4d⁷. Based on its position in the periodic table, what is the most likely charge that element 'X' will form in its most common stable ion?Chemical and Physical Foundations of Biological Systems
  19. 169.An elderly patient with widespread cerebral atrophy is evaluated for cognitive decline. Neuropsychological testing reveals significant deficits in executive functions, including planning, problem-solving, and working memory, but relatively preserved long-term memory for remote events and procedural skills. This pattern of cognitive impairment is most characteristic of damage to which of the following brain regions?Psychological, Social, and Biological Foundations of Behavior
  20. 170.A sociologist observes a small, isolated community that has maintained its traditional customs, language, and social structures for centuries, despite being geographically located within a larger, modern nation-state. The community members exhibit strong ingroup loyalty and resist external influences. This situation is an example of what type of social organization?Psychological, Social, and Biological Foundations of Behavior
  21. 171.A student is performing a calorimetry experiment to determine the enthalpy of neutralization for a reaction between a strong acid and a strong base. They mix 50.0 mL of 1.0 M HCl with 50.0 mL of 1.0 M NaOH in a coffee-cup calorimeter. The initial temperature of both solutions is 22.0 °C, and the final temperature of the mixture is 28.7 °C. Assuming the density of the solution is 1.00 g/mL and the specific heat capacity of the solution is 4.18 J/g·°C, what is the molar enthalpy of neutralization (ΔH_neut) for this reaction? (Assume negligible heat capacity of the calorimeter).Chemical and Physical Foundations of Biological Systems
  22. 172.A patient arrives at the emergency room exhibiting sudden, severe symptoms including difficulty breathing, chest pain, dizziness, and a feeling of impending doom, despite no apparent medical cause. These symptoms rapidly subside after about 20 minutes. The patient reports similar episodes occurring unexpectedly over the past month. What psychological disorder is most consistent with these symptoms?Psychological, Social, and Biological Foundations of Behavior
  23. 173.A cognitive psychologist conducts an experiment where participants are briefly shown a series of common objects (e.g., a chair, a table, a lamp) and then immediately asked to recall them. They find that participants tend to remember the first few items and the last few items in the list more accurately than the items in the middle. This phenomenon is known as the:Psychological, Social, and Biological Foundations of Behavior
  24. 174.A patient with a history of stroke presents with visual agnosia, specifically an inability to recognize faces (prosopagnosia), despite having intact visual acuity and no general intellectual impairment. Damage to which of the following brain regions is most likely responsible for this specific deficit?Psychological, Social, and Biological Foundations of Behavior
  25. 175.A researcher is studying the effects of a new medication on memory recall. They administer the medication to one group of participants and a placebo to another group. After a set period, they test both groups on their ability to recall a list of words. The 'list of words' used in the recall test represents which of the following components of the experimental design?Psychological, Social, and Biological Foundations of Behavior
  26. 176.A researcher conducts an experiment where participants are asked to identify a target letter (e.g., 'X') embedded within a string of other letters. In one condition, the target letter is presented alone (e.g., 'X'). In another condition, the target letter is presented within a string of identical letters (e.g., 'XXXXX'). In a third condition, the target letter is presented within a string of different letters (e.g., 'ABCXD'). If participants are generally faster at identifying the target in the 'XXXXX' condition compared to the 'ABCXD' condition, this phenomenon is best explained by which of the following perceptual processes?Psychological, Social, and Biological Foundations of Behavior
  27. 177.A sociologist observes a family where the parents, despite working long hours at low-wage jobs, emphasize the importance of education and hard work to their children, believing that upward mobility is achievable through individual effort. However, the children attend underfunded schools and lack access to resources that would support their academic success. This situation best illustrates the concept of:Psychological, Social, and Biological Foundations of Behavior
  28. 178.A patient with a history of chronic pain is admitted for a new, acute injury. During their hospital stay, nurses notice that the patient frequently reports pain levels of '10/10' even for minor discomforts, and often requests strong opioid medications. Family members report that the patient often exaggerates symptoms at home to gain attention. This behavior is most consistent with which of the following psychological concepts?Psychological, Social, and Biological Foundations of Behavior
  29. 179.A researcher is studying the phenomenon of stereotype threat among female students in STEM fields. They hypothesize that informing female students that their gender typically performs worse on a particular math test will lead to lower scores compared to a control group not given this information. The scores on the math test for both groups represent the:Psychological, Social, and Biological Foundations of Behavior
  30. 180.A patient experiences a sudden onset of symptoms including muscle paralysis, blindness, and difficulty speaking, but medical examinations reveal no underlying physical cause for these neurological deficits. The patient reports significant psychological stress preceding these symptoms. This presentation is most consistent with which of the following diagnoses?Psychological, Social, and Biological Foundations of Behavior
  31. 181.A clinical trial investigates the efficacy of a new antidepressant. Participants are randomly assigned to either a treatment group receiving the new drug or a control group receiving a placebo. To avoid bias, neither the participants nor the researchers administering the drug know who is receiving which treatment. However, the head researcher, who designed the study and will analyze the data, is aware of the group assignments. This study design is an example of what type of experimental control?Psychological, Social, and Biological Foundations of Behavior
  32. 182.A student is analyzing a ¹H NMR spectrum of an unknown organic compound. They observe a triplet at approximately 1.2 ppm and a quartet at approximately 3.5 ppm. These signals are characteristic of which of the following proton environments?Chemical and Physical Foundations of Biological Systems
  33. 183.A sociologist is studying a community where the majority group holds significant power and resources, while a minority group experiences systemic discrimination and limited opportunities for upward mobility. The minority group, in response, develops a strong sense of collective identity and actively challenges the existing social hierarchy through protests and advocacy. This scenario best illustrates which sociological perspective?Psychological, Social, and Biological Foundations of Behavior
  34. 184.A research team is investigating the genetic basis of a rare neurological disorder. They identify a specific gene mutation consistently present in all affected individuals within several families, but absent in unaffected family members and the general population. The researchers hypothesize that this mutation is directly responsible for the disorder. Which of the following terms best describes the relationship between the identified gene mutation and the neurological disorder?Psychological, Social, and Biological Foundations of Behavior
  35. 185.A 75-year-old patient who recently suffered a stroke exhibits difficulty forming new memories, although he can still recall events from his childhood with vivid detail. He struggles to remember what he had for breakfast an hour ago or the names of new people he meets. Which brain region is most likely affected by the stroke?Psychological, Social, and Biological Foundations of Behavior
  36. 186.A marketing team is designing an advertisement for a new health supplement. They decide to feature a famous, respected doctor endorsing the product, claiming it will significantly boost energy and immunity. This advertising strategy primarily leverages which of the following principles of social influence?Psychological, Social, and Biological Foundations of Behavior
  37. 187.A cognitive psychologist is studying how individuals perceive the completeness of shapes. Participants are shown a series of incomplete figures, such as a circle with a small gap or a square with one corner missing. Most participants report seeing the full, complete shapes despite the missing segments. This phenomenon is best explained by which Gestalt principle of perception?Psychological, Social, and Biological Foundations of Behavior
  38. 188.A research team is investigating the effectiveness of a new therapy for anxiety disorders. They randomly assign participants to either a treatment group receiving the new therapy or a control group receiving a placebo. To ensure that neither the participants nor the researchers administering the therapy know who is receiving which treatment, which of the following research designs is being employed?Psychological, Social, and Biological Foundations of Behavior
  39. 189.A research study aims to investigate the influence of socioeconomic status (SES) on educational attainment. The researchers collect data on parental income, occupation, education level, and the highest degree achieved by children in those families. They then analyze how these different measures of SES correlate with educational outcomes. Which of the following best describes the sociological perspective being utilized in this study?Psychological, Social, and Biological Foundations of Behavior
  40. 190.A researcher is studying the phenomenon of 'learned helplessness' in a group of rats. The rats are initially subjected to unavoidable electric shocks. Later, these same rats are placed in a shuttle box where they can escape the shock by jumping over a barrier. Compared to a control group of rats that did not receive unavoidable shocks, the experimental group is expected to exhibit which of the following behaviors?Psychological, Social, and Biological Foundations of Behavior
  41. 191.A sociologist studies a community where economic opportunities are scarce, leading to high unemployment and poverty. Despite these challenges, there is a strong sense of collective identity and mutual support among residents, with informal networks for sharing resources and childcare. According to Merton's strain theory, which of the following adaptations to strain is most evident in this community?Psychological, Social, and Biological Foundations of Behavior
  42. 192.A researcher is investigating the impact of classical music on plant growth. They expose one group of plants to classical music for 8 hours daily, while a control group grows in silence. All other environmental factors, such as light, water, and temperature, are kept constant. After two months, the researcher measures the average height of the plants in both groups. Which of the following best describes the independent variable in this experiment?Psychological, Social, and Biological Foundations of Behavior
  43. 193.A biochemist is studying a novel enzyme that catalyzes a specific reaction. They find that the enzyme's activity is significantly reduced in the presence of a molecule that binds to a site distinct from the active site, inducing a conformational change that lowers the enzyme's affinity for its substrate. Which type of inhibition is being described?Chemical and Physical Foundations of Biological Systems
  44. 194.A researcher is investigating the impact of a specific neurotransmitter on mood regulation. They measure the levels of this neurotransmitter in different brain regions of participants and correlate these levels with self-reported mood scores. Which type of research method is this?Psychological, Social, and Biological Foundations of Behavior
  45. 195.A patient undergoing therapy for depression is asked to identify and challenge their negative automatic thoughts, such as 'I am a failure' or 'Nothing good ever happens to me.' The therapist helps the patient reframe these thoughts into more balanced and realistic perspectives. This therapeutic approach is characteristic of which of the following?Psychological, Social, and Biological Foundations of Behavior
  46. 196.A student is asked to determine the number of possible stereoisomers for a compound with the formula C₄H₈Br₂ that contains two chiral centers. What is the maximum number of stereoisomers possible for such a compound?Chemical and Physical Foundations of Biological Systems
  47. 197.A patient complains of difficulty falling asleep, frequent awakenings during the night, and feeling unrested despite spending adequate time in bed. These symptoms have been present for several months and are causing significant distress and impairment in daily functioning. Before diagnosing a sleep disorder, a clinician would typically rule out other medical conditions and substance use. This constellation of symptoms is most consistent with which of the following primary sleep disorders?Psychological, Social, and Biological Foundations of Behavior
  48. 198.A patient with a history of recurrent depressive episodes presents to a psychiatrist. During the diagnostic interview, they report feeling persistently sad, having lost interest in previously enjoyable activities, experiencing significant weight loss despite not dieting, and having difficulty concentrating for the past two months. They also mention feeling worthless and having recurrent thoughts of death. Which of the following DSM-5 criteria, if met, would be most critical for diagnosing Major Depressive Disorder in this scenario?Psychological, Social, and Biological Foundations of Behavior
  49. 199.A researcher is studying the mechanism of a complex reaction with two elementary steps: Step 1: A + B → C (fast) Step 2: C + D → E (slow) Which of the following would be the most appropriate rate law for the overall reaction?Chemical and Physical Foundations of Biological Systems
  50. 200.An immigrant family moves to a new country. They maintain their native language at home, celebrate their traditional holidays, and often cook traditional foods. However, they also learn the host country's language, send their children to local schools, and adopt some of the host country's social customs in public. This process of adapting to a new culture while maintaining aspects of one's original culture is best described as:Psychological, Social, and Biological Foundations of Behavior