Practice Science TEAS Test

Practice Science TEAS Test Related

Review Practice Science TEAS Test related questions and content

Which of the following has a smaller genetic scale than a chromosome?

  • A. Genome
  • B. Gene
  • C. DNA
  • D. All of the above
Correct Answer: B

Rationale: The correct answer is 'B: Gene.' A gene is a segment of DNA and is smaller in scale than a chromosome. Genes are the fundamental units of heredity, containing the instructions for building and maintaining an organism. While a chromosome is a larger structure that carries many genes, each gene is a specific segment of DNA responsible for encoding a particular protein or RNA molecule. Choices A, C, and D are incorrect. The 'Genome' (Choice A) refers to the complete set of an organism's genetic material, including all of its genes, while 'DNA' (Choice C) is the molecule that carries the genetic instructions. 'All of the above' (Choice D) is incorrect because not all options have a smaller genetic scale than a chromosome.

You may also like to solve these questions

What does cytokinesis refer to?

  • A. Division of the nucleus
  • B. Division of the cytoplasm
  • C. Separation of chromosomes
  • D. Formation of spindle fibers
Correct Answer: B

Rationale: Cytokinesis refers to the division of the cytoplasm of a parental cell between two daughter cells during cell division. It ensures that each daughter cell receives its share of organelles and cytoplasmic components necessary for cellular functions. Choice A, division of the nucleus, is incorrect as this process is known as mitosis. Choice C, separation of chromosomes, is incorrect as it refers to the process of chromatid separation during mitosis. Choice D, formation of spindle fibers, is incorrect as spindle fibers are involved in mitosis to separate chromosomes, not in cytokinesis.

Which of the following organs is responsible for producing bile?

  • A. Pancreas
  • B. Liver
  • C. Gallbladder
  • D. Stomach
Correct Answer: B

Rationale: The correct answer is B: Liver. The liver is responsible for producing bile, which aids in fat digestion. The pancreas produces digestive enzymes, the gallbladder stores bile produced by the liver, and the stomach primarily secretes gastric acid for digestion. Therefore, choices A, C, and D are incorrect as they do not directly produce bile.

Which of the following joints is an example of a hinge joint?

  • A. Hip joint
  • B. Elbow joint
  • C. Shoulder joint
  • D. Knee joint
Correct Answer: B

Rationale: The correct answer is B: Elbow joint. A hinge joint allows movement primarily in one plane, enabling bending and straightening actions. The elbow joint specifically functions as a hinge joint, facilitating the bending and straightening of the arm. The other options, such as the hip joint (A), shoulder joint (C), and knee joint (D), are not examples of hinge joints as they allow movement in multiple planes with more complex motions.

Which structure in the body is responsible for detecting light and converting it into signals for the brain?

  • A. Iris
  • B. Retina
  • C. Lens
  • D. Pupil
Correct Answer: B

Rationale: The correct answer is the Retina. The retina in the eye contains specialized cells called photoreceptors that detect light and convert it into neural signals. These signals are then transmitted to the brain via the optic nerve for visual processing. The iris is responsible for controlling the amount of light entering the eye by adjusting the size of the pupil, while the lens helps focus light onto the retina. The pupil is simply the opening in the center of the iris that allows light to enter the eye.

Which type of tissue protects the respiratory system's trachea?

  • A. Bone
  • B. Cartilage
  • C. Collagen
  • D. Keratin
Correct Answer: B

Rationale: Cartilage is the correct answer as it provides flexible support and protection in the trachea. Cartilage is specifically designed to maintain the trachea's shape and prevent it from collapsing during breathing. Bone is a rigid tissue, not found in the trachea, and would not provide the necessary flexibility for breathing. Collagen is a structural protein but does not offer the same support and flexibility as cartilage in this context. Keratin is a protein that forms structures like hair and nails, and it is not present in the trachea to provide protection.

Copyright © 2025 Nokea. All rights reserved.