Test Prep OAT Online Practice Questions and Exam Preparation

Test Prep OAT Online Questions & Answers

• Question 181:

  In times of starvation, which of the following would NOT be expected to be seen in high quantity in the blood?

  A. Glucagon
  B. Ghrelin
  C. Ketone bodies
  D. Insulin
  E. B and D
  D. Insulin

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  In times of starvation, glucagon is released by the alpha cells of the pancreas to signal to the liver to break down stored glycogen into free glucose molecules that can enter the blood stream where they are lacking. Ghrelin plays a role in signaling the urge to be `hungry'. Ketone bodies are released by the liver in times of starvation (especially carbohydrate starvation) where they are picked up by cells, converted into acetyl-CoA, entering the TCA cycle.

• Question 182:

  

  A. Option A
  B. Option B
  C. Option C
  D. Option D
  E. Option E
  A. Option A

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  If an aldehyde is treated with ammonia (first step) along with a hydrogen and a metal catalyst, the end product is a primary amine.

• Question 183:

  Which of the following leukocytes function in releasing histamine as an inflammatory response and possesses large cytoplasmic granules?

  A. Neutrophil
  B. Eosinophil
  C. Lymphocyte
  D. Monocyte
  E. Basophil
  E. Basophil

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  Basophils are indeed responsible for releasing histamine as an inflammatory response. Their structure is also indeed of having large cytoplasmic granules.

• Question 184:

  In a sample with 46 homologous pairs of chromosomes, what is the total number of chromatids present in the sample?

  A. 23
  B. 46
  C. 92
  D. 184
  E. 256
  D. 184

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  If there are 46 homologous chromosomes present, it means there is a total of 92 chromosomes. 46 come from the father, 46 from the mother. Thus with 92 chromosomes, there is a total of 184 chromatids.

• Question 185:

  For the following vector, if was 60? what will be the measure of the 'x' component of this vector?

  

  A. 0.87
  B. 0.5
  C. 50
  D. 8.7
  E. None of the above
  E. None of the above

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  Without the magnitude of the vector itself, one cannot calculate the x or y components of the vector. You would need the angle (provided) and the magnitude (not provided) to calculate either components.

• Question 186:

  All of the following are characteristics of a galvanic cell EXCEPT:

  A. It is spontaneous.
  B. Anode is the site of oxidation.
  C. Anions flow to the anode via the salt bridge.
  D. The cathode is negative.
  E. All of the above are true.
  D. The cathode is negative.

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  The cathode is positive in an galvanic cell. It is negative in a non-spontaneous electrolytic cell.

• Question 187:

  Which of the following proteins are incorrectly matched to their functions?

  A. DNA Topoisomerase: relaxes supercoiling.
  B. Helicase: Unwinds the double helix of the DNA by breaking the hydrogen bonds.
  C. DNA Polymerase I: Removes and replaces the RNA primer with DNA.
  D. DNA Ligase: Joins DNA segments together, as seen with Okazaki fragments.
  E. None of the above.
  E. None of the above.

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  All of the answer choices are correct. These proteins are components of DNA replication and should be known.

• Question 188:

  Which of the following demonstrations best illustrates Newton's first law?

  A. Giving a billiard ball at rest on a smooth level table a small push and letting it roll on the table.
  B. Dragging a box in a table at a constant speed by exerting a force just enough to overcome the force of friction.
  C. Trying without success to move a heavy bureau or filing cabinet on the floor.
  D. Running a current through two parallel wires.
  A. Giving a billiard ball at rest on a smooth level table a small push and letting it roll on the table.

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  Newton's first law (inertia) says an object in motion stays in motion, and an object at rest stays at rest, unless external forces act on them. Answer [Giving a billiard ball at rest on...] is an excellent demonstration because it shows the ball at rest and in motion. At rest, the ball stays at rest until a force acts on it. When the ball is moving, there is no force acting on the ball in the direction of motion. Thus, the natural state of the ball is to be at rest or moving with a constant speed. Answer [Trying without success to...] is not a good demonstration because the force of friction is what makes it hard to move the heavy object. Answer [Dragging a box in a table at...] is a good demonstration of equilibrium and friction. Answer "running a current through wires" has nothing to do with Newton's first law.

• Question 189:

  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.

  Based on the passage, which of the following statements seems most true?

  A. Harsh disciplinary measures must be used to control children with ODD.
  B. Parents of children with ODD often engage in risk-taking activities.
  C. A variety of parenting techniques can be used to help children with ODD.
  D. Children with ODD must be physically aggressive to be diagnosed.
  C. A variety of parenting techniques can be used to help children with ODD.

• Question 190:

  A person walks 4 meters in a single direction. He or she then changes directions and walks an additional 9 meters. What is the total magnitude of the displacement of the person?

  A. It is 13 meters.
  B. It is always larger than 9 meters but less than 13 meters.
  C. It is less than 13 meters and as small as 5 meters.
  D. It is less than 5 meters.
  C. It is less than 13 meters and as small as 5 meters.

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  Displacement is a vector that indicates the change in the location of an object. Answer 1 would be correct if the question asked for the total distance the person walked or if the person didn't change direction. If the person turned around 180? the displacement could be as small as 5 meters. If the person changed directions only a fraction of a degree, its magnitude would be less than 13 meters, not as large as 13 meters.