Mometrix TEAS 7 science practice test

Mometrix TEAS 7 science practice test Related

Review Mometrix TEAS 7 science practice test related questions and content

How can bacteria acquire new genetic material from their environment?

  • A. Transformation
  • B. Transduction
  • C. Conjugation
  • D. All of the above
Correct Answer: D

Rationale: A) Transformation: Transformation is the process by which bacteria can take up free DNA from their environment and incorporate it into their own genome, leading to the acquisition of new genetic material and traits.

B) Transduction: Transduction involves the transfer of genetic material from one bacterium to another by a bacteriophage, a virus that infects bacteria. The bacteriophage carries bacterial DNA from one host cell to another, facilitating the transfer of genetic material.

C) Conjugation: Conjugation is a mechanism of horizontal gene transfer in bacteria where genetic material is transferred between two bacterial cells in direct contact. This transfer is facilitated by a conjugative plasmid carrying the genetic information.

Therefore, all the processes mentioned (transformation, transduction, and conjugation) are ways in which bacteria can acquire new genetic material from their environment.

You may also like to solve these questions

What is the structure that attaches to each chromosome during mitosis?

  • A. Centromere
  • B. Telomere
  • C. Spindle apparatus
  • D. Nucleolus
Correct Answer: A

Rationale: The correct answer is the centromere. It is the structure that attaches to each chromosome during mitosis. The centromere serves as the attachment point for spindle fibers during cell division, ensuring proper distribution of chromosomes to daughter cells. Telomeres are found at the ends of chromosomes, providing protection and stability. The spindle apparatus is responsible for separating chromosomes during cell division. The nucleolus, located within the nucleus, is involved in ribosomal RNA synthesis and not in chromosome attachment during mitosis.

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.

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.

Which muscle is the largest in the human body?

  • A. Gluteus maximus (buttocks)
  • B. Quadriceps femoris (thighs)
  • C. Erector spinae (back)
  • D. Pectoralis major (chest)
Correct Answer: A

Rationale: The correct answer is A, the gluteus maximus (buttocks). The gluteus maximus is indeed the largest muscle in the human body, located at the back of the hip and stretching from the sacrum to the femur. This muscle is crucial for hip joint extension, playing a significant role in various activities such as walking, running, and climbing stairs. Choices B, C, and D are incorrect. While the quadriceps femoris, erector spinae, and pectoralis major are also important muscles, they are not the largest muscle in the human body.

What is the pH of a solution with a hydrogen ion concentration of (1x10^{-9}) M?

  • A. 5
  • B. 7
  • C. 9
  • D. 11
Correct Answer: C

Rationale: The pH of a solution can be calculated using the formula: pH = -log[H+]. Given that the hydrogen ion concentration is \(1 \times 10^{-9}\) M, the pH can be calculated as pH = -log(1 x 10^-9) = 9. Therefore, the correct answer is C) 9.

Copyright © 2025 Nokea. All rights reserved.