Practice Science TEAS Test

Correct Answer: B

Rationale: The correct answer is B: Cell membranes. Mesosomes are internal extensions of the cell membrane in prokaryotic cells. They are involved in cell division, DNA replication, and formation of respiratory enzymes. Choice A (Capsule) is incorrect because capsules are external structures surrounding the cell membrane. Choice C (Cell wall) is incorrect as mesosomes are not related to the cell wall, which provides structural support. Choice D (Chromatin body) is incorrect because chromatin bodies are found in eukaryotic cells, not prokaryotic cells where mesosomes are present.

Correct Answer: B

Rationale: The correct answer is B: Pancreas. The pancreas produces digestive enzymes such as amylase, lipase, and proteases that help break down carbohydrates, fats, and proteins in the small intestine. The liver (A) produces bile but not digestive enzymes. The gallbladder (C) stores bile produced by the liver. The esophagus (D) is responsible for transporting food from the mouth to the stomach, not for producing digestive enzymes.

Correct Answer: B

Rationale: Cytokinesis refers to the division of the cytoplasm during cell division, specifically following the separation of chromosomes. This process results in two daughter cells being formed. The correct answer is B because it accurately describes the final step in cell division where the cytoplasm is divided to complete the formation of two separate daughter cells. Choices A, C, and D are incorrect as they do not specifically pertain to the process of cytokinesis. Choice A refers to the division of the nucleus, which is known as mitosis. Choice C refers to the separation of chromosomes, which is part of the earlier stages of cell division. Choice D refers to the formation of spindle fibers, which are involved in chromosome movement during mitosis but not directly related to cytokinesis.

Correct Answer: D

Rationale: The correct answer is D because anatomical terms use specific directions to describe relationships between body parts. In this case, "lateral" refers to the side of the body, so the thumb being on the lateral aspect of the hand is accurate. The other choices are incorrect because they do not follow anatomical terminology standards. Choice A incorrectly compares the shoulder joint to the neck using proximity, not specific directional terms. Choice B uses "superior" incorrectly to describe the elbow joint in relation to the shoulder. Choice C inaccurately compares the thoracic and cervical vertebrae using the term "superior," which is not anatomically correct in this context.

Correct Answer: B

Rationale: The correct answer is B: Glucose. Glucose is a monosaccharide because it is a single sugar molecule, the simplest form of carbohydrates. Starch (A) is a polysaccharide made up of multiple glucose units. Cellulose (C) is also a polysaccharide, not a monosaccharide. Sucrose (D) is a disaccharide composed of glucose and fructose molecules. So, only glucose (B) fits the definition of a monosaccharide in this question.