Mometrix TEAS 7 science practice test

Mometrix TEAS 7 science practice test Related

Review Mometrix TEAS 7 science practice test related questions and content

Which of the following structures plays a crucial role in controlling the cell cycle and preventing uncontrolled cell growth?

  • A. The centrioles
  • B. The nucleolus
  • C. The Golgi apparatus
  • D. The endoplasmic reticulum
Correct Answer: A

Rationale: The correct answer is A: The centrioles. Centrioles are cylindrical structures found in animal cells that are crucial in organizing the spindle fibers during cell division (mitosis). They play a vital role in separating chromosomes during cell division, ensuring each daughter cell receives the correct number of chromosomes. Additionally, centrioles are involved in the formation of cilia and flagella, essential for cell motility and sensory functions. The nucleolus is responsible for ribosome production, the Golgi apparatus processes and packages proteins, and the endoplasmic reticulum is involved in protein synthesis and lipid metabolism. These structures do not have a direct role in controlling the cell cycle and preventing uncontrolled cell growth.

You may also like to solve these questions

What controls the involuntary, rhythmic contractions of the heart muscle?

  • A. Lungs
  • B. Brain
  • C. Spinal cord
  • D. Sinoatrial node (located within the heart)
Correct Answer: D

Rationale: The correct answer is D: Sinoatrial node (located within the heart). The involuntary, rhythmic contractions of the heart muscle are controlled by a specialized group of cells located within the heart called the sinoatrial node (SA node). The SA node acts as the heart's natural pacemaker, producing electrical impulses that regulate the heart rate and synchronize the contractions of the heart muscle. Choices A, B, and C (Lungs, Brain, Spinal cord) are not responsible for directly influencing the rhythmic contractions of the heart muscle.

Where does bile, a substance that aids in digesting fats, originate from?

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

Rationale: Bile is produced by the liver to aid in the digestion and absorption of fats. The liver produces bile, which is then stored and concentrated in the gallbladder before being released into the small intestine to facilitate fat digestion. The stomach (option A) is responsible for the initial digestion of food through gastric juices but does not produce bile. The pancreas (option B) secretes digestive enzymes like lipase to further break down fats in the small intestine but does not produce bile. The gallbladder (option D) stores and concentrates bile but does not produce it.

Which enzyme plays a crucial role in DNA replication during the S phase of interphase?

  • A. Helicase
  • B. DNA polymerase
  • C. Ligase
  • D. Topoisomerase
Correct Answer: B

Rationale: During the S phase of interphase, DNA replication takes place. DNA polymerase is the enzyme responsible for synthesizing new DNA strands by adding nucleotides in a complementary manner to the template strand. It plays a pivotal role in accurately replicating the entire genome. While helicase unwinds the double-stranded DNA for replication, topoisomerase relieves the tension in the DNA strands, and ligase joins the Okazaki fragments on the lagging strand. However, DNA polymerase directly participates in the synthesis of new DNA strands during replication, making it the correct answer.

What is the name for the hard, protective protein that makes up hair and nails?

  • A. Collagen
  • B. Keratin
  • C. Elastin
  • D. Fibrin
Correct Answer: B

Rationale: Keratin is the correct answer as it is the hard, protective protein that comprises hair and nails. Collagen is a different type of protein found in connective tissues, providing structure and support. Elastin imparts elasticity to tissues, allowing them to stretch and recoil. Fibrin is a protein involved in the blood clotting process and is not related to the structure of hair and nails. Therefore, choices A, C, and D are incorrect in the context of the question.

Following successful heart transplant surgery, the patient's body will need to take medications to:

  • A. Suppress the immune system and prevent rejection of the new heart.
  • B. Reduce overall blood pressure.
  • C. Dissolve any remaining blood clots.
  • D. Stimulate the growth of new heart tissue.
Correct Answer: A

Rationale: After heart transplant surgery, the patient's body will need to take medications to suppress the immune system and prevent rejection of the new heart. This is essential to ensure that the body does not identify the transplanted heart as a foreign entity and mount an immune response against it, which could lead to transplant rejection and failure. Choices B, C, and D are incorrect because post-heart transplant medications primarily focus on preventing rejection by suppressing the immune system, rather than reducing blood pressure, dissolving blood clots, or stimulating the growth of new heart tissue.

Copyright © 2025 Nokea. All rights reserved.