Test Prep OAT Online Practice Questions and Exam Preparation

Test Prep OAT Online Questions & Answers

• Question 191:

  Mary's karate class has 7 students with white belts and 21 students with green belts. What is the ratio of students with white belts to all the students in the class?

  A. 7 to 21
  B. 4 to 1
  C. 1 to 3
  D. 1 to 4
  D. 1 to 4

  ---

  7/28 = 1/4.

• Question 192:

  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
  E. All of the above

  ---

  All of the answer choices lead to a positive change of entropy value. Also note, Fusion and Melting are the same thing.

• Question 193:

  With a standard deck, what are the odds of drawing a 8 of hearts followed by a 2 of diamonds, without replacement?

  A. 1/2652
  B. 1/2704
  C. 1/50
  D. 1/3042
  E. 1/1064
  A. 1/2652

  ---

  The chance of drawing a 8 of hearts in a standard deck (52 cards) is simply 1/52. There is only one 8 of hearts in a deck. Without replacement of the 8 of hearts, the chance of drawing a 2 of diamonds is 1/51 (again, 51 because we did not put the 8 of hearts back in the deck, and there is only one 2 of diamonds in a deck). These 2 events are then multiplied because the questions asks for the chance of BOTH happening, not EITHER happening.

  Thus: 1/52 × 1/51 = 1/2652

• Question 194:

  Juliet gets 78, 84, 98, 94 on her first 4 genetics exam. What grade must she receive on her final and fifth exam, in order to attain a 'A' in the class?

  A. 92
  B. 93
  C. 94
  D. 95
  E. 96
  E. 96

  ---

  Make this an algebra type problem as you find the averages of the exam scores to total 450. (Because 450/500 is 90% = A)

  78 + 84 + 98 + 94 + x = 450

  Solving for x: 354 + x = 450 x = 96

• Question 195:

  Which of the following represents the most accurate passageway for air in humans?

  A. Mouth –andgt; Pharynx –andgt; Trachea –andgt; Bronchi –andgt; Bronchioles –andgt; Alveoli
  B. Mouth –andgt; Pharynx –andgt; Alveoli –andgt; Bronchi –andgt; Bronchioles
  C. Mouth –andgt; Esophagus –andgt; Bronchi –andgt; Bronchioles –andgt; Alveoli
  D. Mouth –andgt; Pharynx –andgt; Larynx –andgt; Esophagus –andgt; Alveoli –andgt; Bronchi
  E. Mouth –andgt; Alveoli –andgt; Bronchi –andgt; Trachea
  A. Mouth –andgt; Pharynx –andgt; Trachea –andgt; Bronchi –andgt; Bronchioles –andgt; Alveoli

  ---

  This is the most correct answer choice.

• Question 196:

  If (3a + a) - (2b - 3) = 7, find the values for 'a' and 'b'.

  A. a = 2, b = 3
  B. a = 2, b = 4
  C. a = 4, b = 6
  D. a = 2, b = 2
  E. More than 1 answer choice is correct.
  E. More than 1 answer choice is correct.

  ---

  The easiest way to solve these is NOT to perform step by step algebra solutions that practice test makers put in their solutions manual, but to simply (and quickly) plugin the answer choices and see if it works! Especially for a short, simple algebra problem like this one. In this scenario, both answer choices C and D work.

• Question 197:

  Which of the following arises from the mesoderm?

  A. Pancreas
  B. Lining of digestive system
  C. Skin
  D. Skeletal muscles
  E. Nervous system
  D. Skeletal muscles

  ---

  The mesoderm gives rise to muscle, bone and connective tissue.

• Question 198:

  Which part of the pancreas functions as the endocrine system of the organ?

  A. Gall bladder
  B. Islets of Langerhans
  C. Islets of Granada
  D. Calyx
  E. Hilum
  B. Islets of Langerhans

  ---

  Islets of Langerhans contain the alpha and beta cells, responsible for releasing the hormones glucagon and insulin, respectively.

• Question 199:

  A vessel contains 0.50 moles of nitrogen, 0.40 moles of carbon and 0.10 moles of chlorine at a total pressure of 4.0 atm. What is the partial pressure of the chlorine?

  A. 0.40 atm
  B. 2.00 atm
  C. 1.60 atm
  D. 1.00 atm
  E. Cannot be calculated with this information.
  A. 0.40 atm

  ---

  Begin by calculating the mole fraction of the chlorine: Moles of Cl / Total Moles –andgt; 0.10 mol Cl / 1.0 mol = 0.10 Then multiply the fraction by the total pressure of the system: 0.10 × 4 atm = 0.4 atm

• Question 200:

  In the food chain below, vultures represent grass ?gt; cow ?gt; wolf ?gt; vulture:

  A. Scavengers
  B. Primary carnivores
  C. Detritivores
  D. Secondary consumers
  E. Herbivores
  A. Scavengers

  ---

  Vultures eat carrion, or dead animals, so they are considered scavengers. Detritivores are heterotrophs that eat decomposing organic matter such as leaf litter. They are usually small.