HESI A2 Biology Practice Test

HESI A2 Biology Practice Test Related

Review HESI A2 Biology Practice Test related questions and content

Which type of passive transport uses proteins that change shape to move a target molecule through the membrane?

  • A. Diffusion
  • B. Carrier proteins
  • C. Channel proteins
  • D. None of the above
Correct Answer: B

Rationale: The correct answer is B: Carrier proteins. Carrier proteins are involved in facilitated diffusion, a type of passive transport where specific target molecules are moved across the membrane with the help of proteins that change shape. These carrier proteins bind to the target molecule on one side of the membrane, undergo a conformational change, and then release the molecule on the other side. This process is crucial for the selective transport of certain molecules that cannot pass through the membrane by simple diffusion. Choices A and C are incorrect because diffusion and channel proteins do not involve proteins that change shape to transport target molecules selectively. Choice D is incorrect as carrier proteins fit the description provided in the question.

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A pencil measures 8cm long. What is this in mm?

  • A. 80 mm
  • B. 800 mm
  • C. 8 mm
  • D. 0.8 mm
Correct Answer: A

Rationale: To convert centimeters to millimeters, you need to multiply by 10 since 1 centimeter is equal to 10 millimeters. Therefore, 8 cm x 10 mm/cm = 80 mm. The pencil measures 8 cm, which is equivalent to 80 mm when converted. Choice A is correct as it correctly converts 8 cm to mm by multiplying it by 10. Choices B, C, and D are incorrect because they do not apply the correct conversion factor.

Which of the following statements about the respiratory system is true?

  • A. The respiratory system consists of all the organs involved in breathing
  • B. Organs included in the respiratory system are the nose, pharynx, larynx, trachea, bronchi, and lungs
  • C. The respiratory system conveys oxygen into our bodies and removes carbon dioxide from our bodies
  • D. All of the Above
Correct Answer: D

Rationale: The correct answer is D. The respiratory system consists of all the organs involved in breathing, including the nose, pharynx, larynx, trachea, bronchi, and lungs. Additionally, the respiratory system is responsible for conveying oxygen into our bodies and removing carbon dioxide from our bodies. Therefore, all the statements provided are true, making option D the correct choice. Options A, B, and C are all accurate statements about the respiratory system, reinforcing the correctness of choosing option D.

Which of the following is the best example of a hypothesis?

  • A. Dogs like treats
  • B. Red is the best color
  • C. If I eat 100 donuts, then I will feel sick
  • D. If a plant is exposed to red light, then it will show less growth than natural light
Correct Answer: D

Rationale: Option D is the best example of a hypothesis because it presents a clear cause-and-effect relationship that can be tested through experimentation. It follows the format of 'If [cause], then [effect]' which is characteristic of a hypothesis in scientific research. The statement is specific, testable, and does not rely on personal opinions or biases, making it a strong and valid hypothesis. Choices A, B, and C do not follow the structure of a hypothesis as they lack the cause-and-effect relationship that can be tested through experimentation. They are more like statements or opinions rather than hypotheses.

What type of tissue is fat?

  • A. Connective
  • B. Muscle
  • C. Nervous
  • D. Epithelial
Correct Answer: A

Rationale: Fat is a type of loose connective tissue known as adipose tissue. Adipose tissue primarily functions to store energy and provide cushioning and insulation for organs. While muscle tissue is responsible for movement, nervous tissue transmits nerve impulses, and epithelial tissue covers and protects body surfaces, fat specifically falls under the category of connective tissue.

Which of the following is true of heterozygous traits?

  • A. They are haploid
  • B. They are denoted AA
  • C. They are denoted aa
  • D. They are denoted Aa
Correct Answer: D

Rationale: Heterozygous traits are denoted by having two different alleles for a particular gene, represented as Aa. This means that they are not haploid (A), not denoted AA (B), and not denoted aa (C). Therefore, the correct answer is D, as heterozygous traits are represented as Aa.

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