Test Prep Test Prep Certifications OAT Questions & Answers

• Question 111:

  Which of the following violates the conditions of a population under Hardy-Weinberg equilibrium?

  A. Population is large.

  B. There are no mutations occurring.

  C. Sexual selection

  D. There is no immigration or emigration occurring.

  E. Random mating

  Correct Answer: C

  Hardy-Weinberg conditions must satisfy a large population, with no mutations, random mating, no migration and no natural selection. Sexual selection goes against random mating, and thus, is an incorrect answer choice.

• Question 112:

  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

  Correct Answer: C

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

• Question 113:

  Which of the following is incorrect in regards to mitosis and meiosis?

  A. Both mitosis and meiosis have 1 round of replication.

  B. Meiosis has 2 rounds of division.

  C. Mitosis has 1 round of division.

  D. There is no crossing over in mitosis.

  E. None of the above.

  Correct Answer: E

  All of the answer choices are indeed correct.

• Question 114:

  The contractile ring of cytokinesis begins during which phase?

  A. Telophase

  B. Prophase

  C. Telophase I

  D. Anaphase

  E. Metaphase II

  Correct Answer: D

  Although cytokinesis occurs after telophase, the initiation (forming of contractile ring) begins during the late anaphase.

• Question 115:

  A couple have 3 children between them, all of them boys. If they were to have another baby, what is the chance the gender will be a male?

  A. 1/16

  B. 1/4

  C. 1/2

  D. 1/32

  E. Cannot be determined.

  Correct Answer: C

  This is a simple question that can lead to confusion if you over think. It simply asks what is the chance of having a boy. The background information of their current kids is just additional, unnecessary details. If the question had asked to incorporate the chances from their first kid, it would be different.

• Question 116:

  Bile is produced in which of the following organ(s):

  A. Liver

  B. Kidney

  C. Gallbladder

  D. Pancreas

  E. A and C

  Correct Answer: A

  Bile is produced in the liver and stored in the gallbladder for later secretion.

• Question 117:

  Which of the following functions is NOT controlled by the hypothalamus?

  A. Hunger

  B. Thirst

  C. Sex drive

  D. Blood pressure

  E. Balance

  Correct Answer: E

  With the exception of the balance, all of the following are controlled by the hypothalamus. Balance is controlled by the cerebellum.

• Question 118:

  At which trophic level would you find the greatest amount of biomass?

  A. Producers

  B. Primary Consumers

  C. Secondary Consumers

  D. Tertiary Consumers

  E. Quaternary Consumers

  Correct Answer: A

  Producers have the greatest amount of biomass, whereas the quaternary consumers have the least amount of biomass. Biomass is lost as you go up the food pyramid.

• Question 119:

  The hydrolysis of maltose yields 2 monosaccharide molecules. Which monosaccharides are they?

  A. Glucose and fructose

  B. 2 molecules of glucose

  C. Galactose and glucose

  D. Galactose and fructose

  E. 2 molecules of fructose

  Correct Answer: B

  Sucrose is hydrolyzed into glucose and fructose. Lactose is hydrolyzed into galactose and glucose. Maltose is hydrolyzed into 2 moles of glucose.

• Question 120:

  Spermatogenesis occurs in which of the following?

  A. Vas Deferens

  B. Epididymis

  C. Seminiferous tubules

  D. Urethra

  E. Ovum

  Correct Answer: A