Practice TEAS Science Test

Correct Answer: C

Rationale: The correct answer is C because not all macromolecules contain phosphorus. Macromolecules such as proteins, carbohydrates, and lipids contain carbon, hydrogen, and oxygen but not necessarily phosphorus. Proteins and carbohydrates can exist as single chains or be branched, so choices A and B are not characteristics that exclude a macromolecule. Choice D is also incorrect because not all macromolecules are used by the body, as some like cellulose are not digestible by humans.

Correct Answer: A

Rationale: The correct answer is A: Collecting patient narratives. Qualitative research aims to understand individuals' experiences and perceptions in-depth. Collecting patient narratives allows for capturing subjective insights, emotions, and personal perspectives. This method helps uncover themes, patterns, and nuances in participants' stories, providing rich data for analysis. B: Tracking drug dosage and blood levels is quantitative research, focusing on numerical data. C: Observing physical changes is more suitable for quantitative or observational research. D: Writing journal notes about the research experience is reflective and may provide insights but does not capture the essence of qualitative research, which is to explore subjective experiences.

Correct Answer: D

Rationale: The correct answer is D: Cardiovascular. The cardiovascular system is responsible for transporting dissolved oxygen from the lungs to the spleen. Step 1: Oxygen is inhaled into the lungs during respiration. Step 2: Oxygen diffuses into the bloodstream through the alveoli in the lungs. Step 3: The oxygen-rich blood is pumped by the heart to the spleen and other body tissues. The immune system (A) is responsible for fighting off infections, not oxygen transport. The endocrine system (B) regulates hormones, not oxygen transport. The respiratory system (C) is involved in the exchange of gases in the lungs but does not transport oxygen to the spleen.

Correct Answer: D

Rationale: The correct answer is D: Recessive Inheritance. Mendelian inheritance follows the principles proposed by Gregor Mendel, where traits are determined by pairs of genes, with one being dominant and the other recessive. In recessive inheritance, an individual must inherit two copies of the recessive allele to exhibit the trait. This type of inheritance follows Mendel's laws of segregation and independent assortment. In contrast, incomplete dominance (A) shows blending of traits, polygenic alleles (B) involve multiple genes contributing to a single trait, and combination inheritance (C) is not a recognized term in Mendelian genetics.

Correct Answer: B

Rationale: The correct answer is B: To filter waste from the blood. The kidneys are responsible for filtering waste products and excess fluids from the bloodstream to form urine. This process helps maintain the body's overall balance of fluids and electrolytes. Regulating body temperature is primarily controlled by the skin and sweat glands, not the kidneys (choice A). While the kidneys do produce hormones like erythropoietin and renin, their primary function is waste filtration, not hormone production (choice C). Transporting oxygen is primarily the role of the respiratory and circulatory systems, not the kidneys (choice D).