OAT Online Practice Questions and Answers

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.

According to the passage, which of the following is a cause of ODD?

A. Poor diet

B. Low IQ

C. Excessive television viewing

D. Severe or unpredictable punishment

A bat uses echolocation to identify objects. A bat is traveling to west emits a sound (also heading towards the west) to a stationary object. Which of the following is most accurate in regards to the Doppler effect?

A. Frequency will be the same.

B. Frequency will be higher than the originally emitted one.

C. Frequency will be lower than the originally emitted one.

D. Frequency will not return.

E. Cannot determine.

Rank the following in ascending order of wavelength magnitude:

I. Gamma rays

II. X-Rays

III. Visible light

IV.

Radio waves

A.

III –andgt; I –andgt; II –andgt; IV

B.

I –andgt; II –andgt; III –andgt; IV

C.

II –andgt; I –andgt; IV –andgt; III

D.

IV –andgt; III –andgt; II –andgt; I

E.

II –andgt; I –andgt; III –andgt; IV

Two cars driving in opposite directions collide. If you ignore friction and any other outside interactions, which of the following statements is always true?

A. The total momentum is conserved.

B. The sum of the potential and kinetic energy is conserved.

C. The total velocity of the cars is conserved.

D. The total impulse is conserved.

In a classroom of 189 students, the ratio of boys to girls is 5 : 4. How many boys are there in the classroom?

A. 38

B. 84

C. 105

D. 120

E. 155

Two even integers and one odd integer are multiplied together. Which of the following could be their product?

A. 3.75

B. 9

C. 16.2

D. 24

A red flower is crossed with a white flower and produces a progeny consisting of 100% pink flowers. This is an example of?

A. Incomplete dominance

B. Co-dominance

C. Epistasis

D. Pleitropy

E. Complementation

Which of the following functions is NOT controlled by the hypothalamus?

A. Hunger

B. Thirst

C. Sex drive

D. Blood pressure

E. Balance

The hydrolysis of maltose yields 2 monosaccharide molecules. Which monosaccharides are they?

A. Glucose and fructose

B. 2 molecules of glucose

C. Galactose and glucose

D. Galactose and fructose

E. 2 molecules of fructose

Leaves have parallel veins:

A. Monocots

B. Nonvascular plants

C. Gymnosperms

D. Dicots

E. Angiosperms

Darwin's idea that evolution occurs by the gradual accumulation of small changes can be summarized as:

A. Convergent evolution

B. Adaptive radiation

C. Punctuated equilibrium

D. Phyletic gradualism

E. Sympatric speciation

Which of the following functions is the kidneys NOT responsible for?

A. Excretion

B. Tissue osmolarity homeostasis

C. Producing hormones (endocrine function)

D. Plasma pH homeostasis

E. Kidney is responsible for all of the above.

Which of the following phase changes leads to a positive change in entropy value?

A. Fusion

B. Melting

C. Sublimation

D. Vaporization

E. All of the above

Which of the following, when reacted with benzene, will direct an ortho/para configuration?

A. -COOH

B. -Cl

C. -CH3

D. NO2

E. 2 of the above

Predict the product of the following reaction: A. Option A

B. Option B

C. Option C

D. Option D

E. Option E