Test Prep OAT Online Practice Questions and Exam Preparation

Test Prep OAT Online Questions & Answers

• Question 1:

  For the following equation: 2x2 - 10x + 12 = 0, find the roots.

  A. x = 1, x = 4
  B. x = 2, x = 6
  C. x = 0, x = 1
  D. x = 2, x = 3
  E. None of the above
  D. x = 2, x = 3

• Question 2:

  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
  A. Incomplete dominance

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  When the progeny is a hybrid characteristic of the parentals, this is indeed incomplete dominance. Co-dominance can refer to blood types (A and B) whereas epistasis is one gene making the phenotypic expression of a second gene.

• Question 3:

  Identify the missing reagent in the reaction below:

  

  A. 1) BH3, THF; 2) H2O2, OH
  B. CH2N2, Heat
  C. Cl2, CCl4
  D. 1) OsO4; 2) NaHSO3
  E. 1) O3; 2) Zn, H2O
  C. Cl2, CCl4

• Question 4:

  Which of the following is defined by the 2nd law of thermodynamics?

  A. In any spontaneous process, the entropy of the universe always increases.
  B. Energy cannot be created or destroyed.
  C. The entropy of a perfect crystal approaches 0 as temperature approaches absolute 0.
  D. Any object in motion will remain in motion unless a force is acted upon it.
  E. For every action, there is an equal and opposite reaction.
  A. In any spontaneous process, the entropy of the universe always increases.

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  Answer choice [Energy cannot be created or destroyed.] is the 1st law of thermodynamics and [The entropy of a perfect crystal approaches...] is the 3rd law. Choices [Any object in motion will remain in...] and [For every action, there is...] are part of Newton's laws of motion.

• Question 5:

  Which of the following is false regarding SN2 reactions?

  A. SN2 occurs in one step.
  B. Common solvents include DMSO and acetone.
  C. Steric hindrance increases from primary to secondary to tertiary.
  D. SN2 prefers to proceed with strong nucleophiles.
  E. None of the above.
  E. None of the above.

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  All of the answer choices accurately represent SN2 reactions.

• Question 6:

  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
  E. Suckerfish and shark

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  The sucker fish (also known as Remora) attaches to the shark and eats what the shark discards and gets protection at the same time, all while the shark doesn't get any benefit (nor harm) from this attachment. The virus and host cell is a form of parasitism, and the other examples are all mutualism, where both organisms involved in the relationship benefit.

• Question 7:

  What corresponds to the amplitude of a sound wave?

  A. loudness
  B. pressure differential of fluctuations
  C. magnitude of motion of air molecules
  D. power
  B. pressure differential of fluctuations

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  When a tuning fork vibrates it creates areas of condensation (higher pressure) and rarefactions (lower pressure) that propagate through the air because of the air's elasticity. The distance between the condensations or rarefactions is the wavelength of the sound. The amplitude of the sound is half the difference between the pressure of the condensation and the pressure of the rarefaction. Loudness and power are both logarithmic measures that depend on the amplitude, but are not directly proportional to it. For example, doubling the amplitude will not double the loudness or power; those quantities will increase just slightly.

• Question 8:

  Hormones composed of steroids are synthesized in which of the following organelles in the cell?

  A. Smooth ER
  B. Rough ER
  C. Golgi apparatus
  D. Ribosomes
  E. Peroxisomes
  A. Smooth ER

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  The smooth ER is responsible for synthesizing components of the plasma membrane along with lipids (steroids) such as testosterone that act as hormones in the body. It is critical to be familiar with the cell organelles and their function as it is expected to be a question in the biology section.

• Question 9:

  If 8 people can eat 6 bags of chips, how many people will it take to eat 15 bags of chips?

  A. 22
  B. 18
  C. 16
  D. 20
  D. 20

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  Use a proportion to solve the problem. 8/6 = x/15, 60 = 3x, x = 20.

• Question 10:

  Carbohydrate digestion begins in the ______, while protein digestion begins in the ______?

  A. Mouth / Mouth
  B. Stomach / Mouth
  C. Stomach / Stomach
  D. Small Intestine / Stomach
  E. Mouth / Stomach
  E. Mouth / Stomach

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  Carbohydrate digestion begins in the mouth with the initial breakdown via salivary amylase. Proteins begin being denatured in the stomach via hydrochloric acid and the enzyme pepsin.