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.

As used in this passage, the phrase low frustration tolerance most nearly means:

A. The ability to cope with frustration

B. Patience

C. Low IQ

D. Difficulty dealing with frustration

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.

A lead sphere 10 centimeters in diameter is attached to a 10-meter wire and suspended from a beam in a large warehouse. A lead sphere 1 meter in diameter is hung next to the smaller sphere, almost touching. Ignoring friction, which statement is true?

A. The small sphere will move slightly towards the big sphere, but the big sphere will not move.

B. The big sphere will move slightly toward the small sphere, but the small sphere will not move.

C. Neither sphere will move.

D. Both spheres will move slightly towards each other.

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

Which of the following is a component of bacterial cell wall?

A. Chitin

B. Cellulose

C. Peptidoglycan

D. All of the above

E. None of the above

Which of the following is false in regards to food pyramids?

A. As the pyramid ascends, there is less energy.

B. As the pyramid ascends, there is less mass.

C. As the pyramid descends, there is more mass.

D. As the pyramid descends, there is fewer organisms.

E. Algae would be found at the bottom of the pyramid.

Which of the following relationships is an example of commensalism?

A. Virus – Host cell

B. Bacteria in intestines of humans

C. Nitrogen-fixing bacteria in legumes

D. Spider crab and algae

E. Suckerfish and shark

A segment of DNA contains the following code: ATGGCGCCTTA. What would the sequence of its transcribed mRNA be?

A. ATTCCGCGGTA

B. TACCGCGGAAT

C. UACCGCGGAAU

D. AUCCGCGGAAT

E. ATGGCGCCTTA

What is the relationship between the following two molecules?

A. Enantiomers

B. Identical compounds

C. Meso compounds

D. Diastereomers

E. Structural isomers

In numbering and naming a chain, which of the following functional groups receives the highest priority?

A. Carboxylic acids

B. Aldehydes

C. Ketones

D. Amines

E. Alkynes