fill in the blank with the correct subordinating c 2397037

ATI TEAS 7

TEAS English Practice Test

1. Fill in the blank with the correct subordinating conjunction: '... the class was difficult, Allison passed with flying colors.'

A. If
B. Since
C. Because
D. Although

Correct answer: D

Rationale: The correct conjunction is 'Although.' In this sentence, there is a contrast being made between the difficulty of the class and Allison's success, indicating that despite the class being difficult, she excelled. 'If' implies a condition, 'Since' indicates a reason, and 'Because' shows causation, which do not fit the context of the sentence where a contrast is being expressed.

2. What is hemoglobin?

A. an enzyme
B. a protein
C. a lipid
D. an acid

Correct answer: B

Rationale: Hemoglobin is a protein found in red blood cells that plays a crucial role in transporting oxygen from the lungs to the tissues and organs in the body. It is composed of four protein subunits, each containing a heme group that binds to oxygen molecules. Choice A is incorrect as hemoglobin is not an enzyme, but rather a protein. Choice C is incorrect as hemoglobin is not a lipid, but a protein. Choice D is incorrect as hemoglobin is not an acid, but a protein.

3. Which statement is true about the pH of a solution?

A. A solution cannot have a pH less than 0.
B. A solution always has a pH of 7.
C. A solution's pH is not influenced by its chemical composition.
D. A solution with a pH of 14 is considered acidic.

Correct answer: A

Rationale: The pH scale ranges from 0 to 14, with 0 being the most acidic, 7 neutral, and 14 the most basic. A solution with a pH less than 0 would be outside the defined pH range, as 0 is the lower limit. Therefore, a solution cannot have a pH less than 0. Choice B is incorrect because a pH of 7 is considered neutral, not always the pH of a solution. Choice C is incorrect because a solution's pH is influenced by its chemical composition. Choice D is incorrect as a solution with a pH of 14 is considered highly basic, not acidic.

4. Which type of blood cell is primarily responsible for fighting infections?

A. Red blood cell
B. White blood cell
C. Platelet
D. Plasma

Correct answer: B

Rationale: The correct answer is B: White blood cell. White blood cells are the primary cells responsible for fighting infections and foreign invaders in the body. Red blood cells carry oxygen to tissues, platelets help in blood clotting to prevent excessive bleeding, and plasma is the liquid component of blood that carries cells and nutrients. White blood cells, also known as leukocytes, play a crucial role in the immune system by identifying and destroying pathogens, such as bacteria, viruses, and other harmful substances. Therefore, they are the key players in the body's defense against infections, making them the correct answer in this scenario. While red blood cells, platelets, and plasma have essential functions in the body, they are not primarily responsible for combating infections like white blood cells.

5. The chemical equation below is unbalanced. When it is properly balanced, how many molecules of carbon dioxide (CO2) are produced for each molecule of propane (C3H8) in the reaction? 3C3H8 + 5O2 â†’ 3CO2 + 4H2O

A. One Half.
B. Two.
C. Three.
D. Five.

Correct answer: B

Rationale: The balanced chemical equation for the combustion of propane is: 3C3H8 + 5O2 â†’ 3CO2 + 4H2O. This equation shows that for every 3 molecules of propane (C3H8) consumed, 3 molecules of carbon dioxide (CO2) are produced. Therefore, when properly balanced, 3CO2 are produced for each molecule of propane used. Thus, the correct answer is B: Two. Choices A, C, and D are incorrect because they do not reflect the correct stoichiometry as determined by the balanced equation.