Total 285 Questions |
Updated On: Aug 19, 2026
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100% Free PCAT Practice Exam Questions (2026)
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Question 1
What fractional part of an hour is 400 seconds?
Answer: D
Question 2
If a substance has a constant half-life of 10 weeks, how many grams of a 12 g sample would remain after 30
weeks?
Answer: D
Question 3
What is the molecular formula of acetic acid?
Answer: A
Question 4
On a bad day, have you ever been irritable? Have you ever used a harsh tone or even been verbally
disrespectful to your parents or teachers? Everyone has a short temper from time to time, but current statistics
indicate that between 16% and 20% of a school population suffer from a psychological condition known as
Oppositional Defiance Disorder, or ODD.
ODD symptoms include difficulty complying with adult requests, excessive arguments with adults, temper
tantrums, difficulty accepting responsibility for actions, low frustration tolerance, and behaviors intended to
annoy or upset adults. Parents of children with ODD can often feel as though their whole relationship is based
on conflict after conflict.
Unfortunately, ODD can be caused by a number of factors. Some students affected by ODD suffer abuse,
neglect, and severe or unpredictable discipline at home. Others have parents with mood disorders or have
experienced family violence. Various types of therapy are helpful in treating ODD, and some drugs can treat
particular symptoms. However, no single cure exists.
The best advice from professionals is directed toward parents. Therapists encourage parents to avoid
situations that usually end in power struggles, to try not to feed into oppositional behavior by reacting
emotionally, to praise positive behaviors, and to discourage negative behaviors with timeouts instead of harsh
discipline.
As used in this passage, the phrase feed into most nearly means:
Answer: A
Question 5
Coughs that linger after a cold or sinus problem cause constant disruption in the home, school, and workplace.
Often, these dry, nonproductive coughs become increasingly troublesome although other symptoms – fever,
congestion, and fatigue – resolved days or weeks ago. This stubborn cough persists for weeks, and plagues its
victim and the victim’s family night and day. The diagnosis might be a common, but overlooked cause of
lingering cough: atypical pneumonia caused by mycoplasma. Mycoplasma – pleomorphic bacteria that lack a
cell wall – are the smallest and simplest self-replicating organisms known to humans. They probably evolved
from gram-positive, walled eubacteria by degenerative evolution. Smaller than amoebas, these 0.1-micrometer
organisms grow and reproduce slowly and require no oxygen or host cell. They also change shapes
asymmetrically, appearing as long, thin filaments, tiny spheres, or branches. Scientists have identified more
than 100 mycoplasma species. Fifteen species are known to live in humans, most as normal symbiotic flora.
Mycoplasma pneumoniae, previously called “walking pneumonia,” is pathogenic in humans. Mycoplasma
pneumoniae glides freely and uses its specialized filamentous tips to burrow between cilia within the respiratory
epithelium, causing the respiratory epithelial cells to slough. It also produces hydrogen peroxide, which causes
initial cell disruption in the respiratory tract and damages erythrocyte membranes. Researchers have
determined that more than 40% of infants younger than 1 year old have had a mycoplasma infection. By age 5,
approximately 65% of children have been infected. Nearly all adults have been infected at least once, often
repeatedly. Mycoplasma pneumonia usually affects people younger than 40 years of age. The highest
incidence is found in the 5- to 9-year age group. The risk of contracting mycoplasma pneumonia is greatest for
people who live or work in crowded areas, such as daycare facilities, schools, homeless shelters, long-term
care units, and military and prison environments. However, many people who develop mycoplasma infections
have no identifiable risk factor. Most mycoplasma infections cause mild to moderate clinical symptoms, but the
infection incubates over 3 weeks and can last weeks without treatment. This infection cannot be diagnosed
based on symptoms alone; laboratory testing is essential. Infection can also cause ear infections, sinus
infections, bronchitis, croup, severe sore throats, infectious asthma, and 1 type of the common cold. When
mycoplasma infects children, about 25% of them develop nausea, vomiting, or diarrhea.
Which of the following is NOT true about mycoplasma infection?
Answer: C
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Total 285 Questions |
Updated On: Aug 19, 2026
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