Test Prep OAT Online Practice Questions and Exam Preparation

Test Prep OAT Online Questions & Answers

• Question 111:

  Which of the following accurately states the products of the citric acid cycle?

  A. 6 NADH, 2 FADH2, 2 ATP, 4 CO2
  B. 12 NADH, 4 FADH2, 4 ATP, 8 CO2
  C. 3 NADH, 1 FADH2, 1 ATP, 2CO2
  D. 6 NADH, 4 FADH2, 4 ATP, 4 CO2
  E. 6 NADH, 2 FADH2, 8 ATP, 4 CO2
  A. 6 NADH, 2 FADH2, 2 ATP, 4 CO2

  ---

  6 NADH, 2 FADH2, 2 ATP, 4 CO2 indeed describes the products of the citric acid cycle (Krebs cycle). This is a conceptual question dealing with respiration. One should know the general reactants and products of the various aerobic and anaerobic cycles dealing with respiration.

• Question 112:

  Which hormone is responsible for red blood cell production?

  A. Prolactin
  B. Aldosterone
  C. ACTH
  D. Oxytocin
  E. Erythropoietin
  E. Erythropoietin

  ---

  Erythropoietin is produced in the kidneys and travels to the bone marrow signaling the production of RBC.

• Question 113:

  Sutures are:

  A. Bone to bone connectors, such as the knee joint
  B. Points of attachment for skeletal muscle to bone
  C. Immovable joints, such as in the human skull
  D. The replacement of cartilage by bone
  E. None of the above
  C. Immovable joints, such as in the human skull

  ---

  This is the definition of sutures. Tendons are what attaches muscle to bone. Endochondral ossification is replacing existing cartilage with bone

• Question 114:

  If red hair is dominant over black hair, what is the expected phenotypic ratio of the F1 generation of red hair to black hair if a homozygous dominant breed with a heterozygous?

  A. 100% black hair
  B. 75% red hair; 25% black hair
  C. 50% red hair; 50% black hair
  D. 75% black hair; 25% red hair
  E. 100% red hair
  E. 100% red hair

  ---

  This is a simple monohybrid cross. Assume `R' for the dominant red hair and `r' for the recessive black hair.

  

  From this cross, it is obvious to see all the offspring will have red hair.

• Question 115:

  A charged particle is traveling to the right with its magnetic field coming into the page (or screen). Which direction does its force face?

  A. Out of the page
  B. Into the page
  C. Left
  D. Right
  E. Up
  E. Up

  ---

  Using the right-hand rule, thumb is velocity (pointing right, as particle travels to the right), fingers are magnetic field (point away from you) and thus the force (palm) points up.

• Question 116:

  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
  D. Difficulty dealing with frustration

• Question 117:

  Which of the following best describes the relationship between the 2 products below?

  

  A. Enantiomers
  B. Diastereoisomers
  C. Identical compounds
  D. Constitutional isomers
  E. 2 of the above
  C. Identical compounds

  ---

  Simply flipping anyone of the products will make it look identical to the other, thus they are simply the same compound.

• Question 118:

  Which of the following molecules is thought to have acted as the first enzyme in early life on earth?

  A. Protein
  B. RNA
  C. Triglycerides
  D. Phospholipids
  E. DNA
  B. RNA

  ---

  Some RNA molecules in extant organisms have enzymatic activity; for example, the formation of peptide bonds on ribosomes is catalyzed by an RNA molecule. This and other information have led scientists to believe that the most likely molecules to first demonstrate enzymatic activity were RNA molecules.

• Question 119:

  What is the hybridization of this atom?

  

  A. sp
  B. sp2
  C. sp3
  D. s
  E. 2s2
  B. sp2

  ---

  Pay special attention to the `+' symbol indicating a cation. If it lacked a positive or negative sign, it would be a sp3 hybridization.

• Question 120:

  Spermatogenesis occurs in which of the following?

  A. Vas Deferens
  B. Epididymis
  C. Seminiferous tubules
  D. Urethra
  E. Ovum
  A. Vas Deferens