TEAS Test 7 science

TEAS Test 7 science Related

Review TEAS Test 7 science related questions and content

What is the role of RNA in the regulation of gene expression?

  • A. Provides energy for the process
  • B. Controls the timing and location of protein synthesis
  • C. Translates the genetic code into amino acids
  • D. Stores genetic information
Correct Answer: B

Rationale: A) RNA does not provide energy for the process of gene expression. Energy is typically provided by molecules like ATP. B) RNA plays a crucial role in controlling the timing and location of protein synthesis through processes like transcriptional regulation, RNA splicing, and post-transcriptional modifications. It helps determine when and where specific proteins are produced in the cell. C) While mRNA translates the genetic code into amino acids during the process of translation, this is not the primary role of RNA in the regulation of gene expression. D) RNA does not store genetic information in the same way that DNA does. DNA is the molecule responsible for storing genetic information in the form of genes. Therefore, option B is the most appropriate choice as it accurately describes the role of RNA in regulating gene expression.

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Which of the following terms refers to a muscle twitch, a single forceful contraction of a muscle fiber?

  • A. Tetanus
  • B. Tremor
  • C. Fasciculation
  • D. Rigidity
Correct Answer: C

Rationale: The correct term for a muscle twitch, a single forceful contraction of a muscle fiber, is 'Fasciculation' (choice C). Fasciculation specifically describes this phenomenon. 'Tetanus' (choice A) refers to sustained muscle contraction, 'Tremor' (choice B) indicates a shaky or quivering movement, and 'Rigidity' (choice D) denotes stiffness or inflexibility in muscles. Therefore, choices A, B, and D are incorrect in the context of a single forceful contraction of a muscle fiber.

Dendrites are finger-like extensions found on

  • A. Muscle cells
  • B. Connective tissue cells
  • C. Neurons
  • D. Epithelial cells
Correct Answer: C

Rationale: Dendrites are the branched extensions of neurons that receive signals from other neurons and transmit those signals to the cell body. They play a crucial role in the communication process within the nervous system, allowing neurons to communicate with each other and integrate incoming signals to generate responses. The other choices are incorrect because dendrites specifically belong to neurons, not muscle cells, connective tissue cells, or epithelial cells.

What is the 3D structure of a protein called?

  • A. Tertiary structure
  • B. Secondary structure
  • C. Primary structure
  • D. Quaternary structure
Correct Answer: A

Rationale: - Primary structure refers to the linear sequence of amino acids in a protein.
- Secondary structure refers to local folded structures within a protein, such as alpha helices and beta sheets.
- Tertiary structure is the overall 3D shape of a protein, which is determined by interactions between amino acid side chains and the environment.
- Quaternary structure refers to the arrangement of multiple protein subunits in a protein complex.

Therefore, the 3D structure of a protein is called the tertiary structure because it represents the overall folding of the protein into a specific shape.

How does friction affect motion?

  • A. Friction increases speed
  • B. Friction decreases speed
  • C. Friction has no impact on speed
  • D. Friction causes objects to float
Correct Answer: B

Rationale: Friction is a force that opposes motion when two surfaces are in contact. It acts in the opposite direction to the direction of motion, causing objects to slow down or come to a stop. Therefore, friction decreases speed rather than increasing it. Choice A is incorrect as friction does not increase speed but rather hinders it. Choice C is incorrect because friction does have an impact on speed by slowing down objects. Choice D is incorrect as friction's effect is not making objects float but rather causing resistance to motion.

What is the term for the maximum amount of solute that can dissolve in a solvent at a specific temperature and pressure?

  • A. Molarity
  • B. Solubility
  • C. Concentration
  • D. Saturation
Correct Answer: B

Rationale: Solubility is the correct term for the maximum amount of solute that can dissolve in a solvent at a specific temperature and pressure. Molarity is a measure of concentration, not the maximum amount that can dissolve. Concentration is a general term for the amount of solute present in a given amount of solvent. Saturation is related to solubility but specifically refers to a state where no more solute can be dissolved in the solvent.

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