TEAS 7 practice test free science

TEAS 7 practice test free science Related

Review TEAS 7 practice test free science related questions and content

Certain medications can suppress the immune system to treat autoimmune diseases or prevent organ rejection after transplants. What is a potential risk associated with immunosuppressive drugs?

  • A. Increased risk of developing allergies
  • B. Increased susceptibility to infections
  • C. Both A and B
  • D. Neither A nor B
Correct Answer: B

Rationale: Immunosuppressive drugs work by suppressing the immune system's activity, which can increase the risk of infections as the body's ability to fight off pathogens is compromised. While allergies can be a side effect of some medications, the primary concern with immunosuppressive drugs is the increased susceptibility to infections. Therefore, the correct answer is B, increased susceptibility to infections. Choice A, 'Increased risk of developing allergies,' is incorrect as the primary risk associated with immunosuppressive drugs is not related to allergies. Choice C, 'Both A and B,' is incorrect as the main concern is the increased susceptibility to infections rather than developing allergies. Choice D, 'Neither A nor B,' is incorrect as there is a known risk of increased susceptibility to infections when using immunosuppressive drugs.

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Which of the following is NOT a type of vaccine?

  • A. Live attenuated vaccine
  • B. Toxoid vaccine
  • C. Conjugate vaccine
  • D. Antibiotic
Correct Answer: D

Rationale: A) Live attenuated vaccine: This type of vaccine contains a weakened form of the virus or bacteria that causes the disease. When administered, it stimulates an immune response without causing the disease itself.
B) Toxoid vaccine: Toxoid vaccines are made from toxins produced by bacteria that have been inactivated. They stimulate the immune system to produce antibodies against the toxin, providing immunity against the disease.
C) Conjugate vaccine: Conjugate vaccines are made by combining a weak antigen with a strong antigen to enhance the immune response. They are commonly used to protect against bacterial infections.
D) Antibiotic: Antibiotics are medications used to treat bacterial infections by killing or inhibiting the growth of bacteria. They are not a type of vaccine but rather a class of antimicrobial drugs.

Therefore, the correct answer is D) Antibiotic, as it is not a type of vaccine.

The term 'symbiotic relationship' describes an interaction between two organisms where:

  • A. One organism benefits and the other is unaffected
  • B. Both organisms are harmed by the interaction
  • C. One organism benefits and the other is negatively impacted
  • D. Both organisms benefit from the interaction
Correct Answer: D

Rationale: In a symbiotic relationship, both organisms involved benefit from the interaction. This mutually beneficial relationship can take different forms, such as mutualism where both organisms benefit, commensalism where one organism benefits and the other is unaffected, or parasitism where one organism benefits at the expense of the other. In this case, the term 'symbiotic relationship' specifically refers to a scenario where both organisms derive some form of benefit from their interaction. Choices A, B, and C are incorrect because they do not accurately describe a symbiotic relationship. In symbiosis, both organisms benefit, making option D the correct choice.

What is the recommended daily fluid intake for adults?

  • A. 1 liter
  • B. 2 liters
  • C. 3 liters
  • D. 4 liters
Correct Answer: B

Rationale: The recommended daily fluid intake for adults is typically around 2 liters, which is equivalent to about 8 cups or half a gallon. This amount can vary depending on factors such as age, gender, weight, activity level, and climate. Staying adequately hydrated is essential for overall health and helps maintain proper bodily functions, such as regulating body temperature, aiding digestion, and transporting nutrients and oxygen throughout the body. Drinking enough fluids also helps prevent dehydration, which can lead to symptoms like fatigue, headaches, and dizziness. Choice A, 1 liter, is insufficient and may not meet the body's hydration needs, while choices C and D, 3 liters and 4 liters, respectively, are excessive for most adults and could potentially lead to overhydration, which may have negative health consequences. It's important to note that individual fluid needs may vary, so it's always best to consult with a healthcare provider for personalized recommendations.

What property of a wave determines its pitch in sound waves?

  • A. Amplitude
  • B. Frequency
  • C. Wavelength
  • D. Speed
Correct Answer: B

Rationale: The pitch of a sound wave is determined by its frequency. Frequency is the number of cycles of a wave that occur in a unit of time, usually measured in hertz (Hz). Higher frequencies correspond to higher pitches, while lower frequencies correspond to lower pitches. Amplitude refers to the height of a wave and is related to the loudness of the sound. Wavelength is the distance between two consecutive points in a wave that are in phase, and speed is the rate at which a wave travels through a medium. Therefore, the correct answer is frequency as it directly correlates with the pitch of a sound wave.

Which type of RNA carries the genetic code from DNA to ribosomes?

  • A. Ribosomal RNA (rRNA)
  • B. Transfer RNA (tRNA)
  • C. Messenger RNA (mRNA)
  • D. Deoxyribonucleic acid (DNA)
Correct Answer: C

Rationale: - Messenger RNA (mRNA) carries the genetic information from DNA in the cell's nucleus to the ribosomes in the cytoplasm, where protein synthesis occurs.
- Ribosomal RNA (rRNA) is a component of the ribosomes where protein synthesis takes place.
- Transfer RNA (tRNA) is responsible for bringing amino acids to the ribosomes during protein synthesis.
- Deoxyribonucleic acid (DNA) is the genetic material that contains the instructions for building and maintaining an organism. DNA is transcribed into mRNA before being translated into proteins.

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