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Praxis Academic

Test Prep & Tutoring

DAT

Practice Questions

Survey of Natural Sciences

1) All of the following are connective tissues EXCEPT?

blood

muscle

subcutaneous layer of skin

cartilage

tendons

2) Who may an individual with the blood genotype Z^AZ^O donate blood to and receive blood from, respectively?

A, AB type; A, AB type

A type only; A type only

A, AB type; A, O type

A type only; O type only

A, O type; A, AB, O type

3) A solution of bacterial cell membrane components contained antigenic and transport membrane proteins, glycoprotein receptors, and phospholipids. An enzyme was added to the solution and incubated for 30 minutes in ambient temperature. Afterward, the solution was analyzed, and it was found that all the components above were still in solution except for the glycoprotein receptors. It can be concluded that the enzyme was a(n):

aminopeptidase.

pepsin.

carboxypeptidase.

isomerase.

glycoprotease.

4) Freckles is an autosomal dominant trait. What is the frequency of the dominant allele in a family whereby 25% of its members do not have freckles?

0.95

0.75

0.50

0.25

0.13

5) Which structure in the brain synthesizes Antidiuretic Hormone (ADH)?

Hypothalamus

Anterior Pituitary Gland

Posterior Pituitary Gland

Pineal Gland

Renal Medulla of Kidney

6) In which of the following reactions is water acting as an acid?

Cu_(s) + 2H₃O⁺ –> Cu²⁺ + H_2(g) + H₂O

HCl_(g) + H₂O –> H₃O⁺ + Cl^–

HC₃H₅O₂ + H₂O <–> H₃O⁺ + C₃H₅O_2(g)^–

NH₃ + H₂O <–> NH₄⁺ + OH^–

NH₃ + + 2H₃O⁺ –> NH₄⁺ + H₂O

7) Which of the following pairs of atoms would form an ionic bond with the greatest ionic character?

P and Br

Zn and K

O and H

F and Ca

H and H

8) The reverse reaction of sublimation whereby gas transmutes directly into solid, bypassing the liquid phase, is called:

vaporization.

deposition.

fusion.

crystallization.

evaporation.

9) What is the oxidation number of the Sulfur atom in the compound S₂O₃^2– ?

–1

–2

10) What is the name of the functional group on this hydrocarbon?

amine

amide

carboxylic acid

ketone

aldehyde

11) What is the name of the functional group on this hydrocarbon?

cis

trans

It is not isomeric.

Reading Comprehension coming soon… promise!

Quantitative Reasoning

1) If a soccer ball weighs 434 g, what is its weight in kg?

4.34

0.434

0.343

43.4

0.0434

2) Which of the following is the length of side W in the right triangle given below?

3) Which of the following is the value of x if (4x+1)² = 4?

1/4

–1/4

3/4

–3/4

–2/5

4) Which of the following is equivalent to this fraction?

[2–(2/3)] / [2+(1/3)]

4/3

5/3

4/7

4/5

5/4

5) What is the distance between points (–2,3) and (1,7) in the standard coordinate plane?

6) An isosceles triangle has a height of 5cm and a base of 12cm. What would be the measure of the sum of the equivalent angles?

Tan(12/5)

Tan(5/12)

2Tan(6/5)

Arctan(6/5)

2Arctan(6/5)

7) A manufacturer sells 12 dozen dresses at $11 each, 3 dozen sweaters at $8.50 each, 2½ dozen hats at $7 each, and 8 dozen sock pairs at $1.50 each. What is the best approximation for the manufacturer’s gross sales?

$187

$714

$924

$2,200

$3,000

8) If two 4-sided die like the one shown below (each dice-face numbered 1, 2, 3, and 4) are rolled, what is the probability that the sum of the numbers rolled will be 7?