TEAS Test 7 science quizlet

TEAS Test 7 science quizlet Related

Review TEAS Test 7 science quizlet related questions and content

Fluorescent microscopy utilizes which property of certain molecules to create a visible image?

  • A. Staining properties
  • B. Light absorption
  • C. Fluorescence emission
  • D. Refraction
Correct Answer: C

Rationale: Fluorescent microscopy relies on the property of certain molecules to fluoresce when exposed to specific wavelengths of light. When these molecules absorb light energy, they become excited and then emit light at a longer wavelength, producing a visible image. This emitted light is what is used to create the image in fluorescent microscopy, making option C, fluorescence emission, the correct answer. Staining properties (option A) are used to enhance contrast in microscopy but are not the primary mechanism in fluorescent microscopy. Light absorption (option B) is involved in the excitation of fluorescent molecules but is not the property used to create the visible image. Refraction (option D) is the bending of light as it passes through different mediums and is not the property utilized in fluorescent microscopy.

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A ball is thrown horizontally off a cliff with a speed of 10 m/s. What is the horizontal distance the ball travels before hitting the ground?

  • A. 10 m
  • B. 20 m
  • C. 30 m
  • D. Cannot be determined without knowing the height of the cliff
Correct Answer: C

Rationale: When a ball is thrown horizontally, its horizontal velocity remains constant throughout its motion. The horizontal distance traveled by the ball is determined by the horizontal velocity and the time taken to hit the ground. In this case, the horizontal distance is calculated as distance = velocity time. Since the horizontal velocity is 10 m/s, the horizontal distance traveled by the ball is 10 m/s time. The time taken to hit the ground is determined by the vertical motion, which is independent of the horizontal velocity. Therefore, without knowing the height of the cliff, we can still determine the horizontal distance traveled by the ball. The horizontal distance is solely dependent on the horizontal velocity and the time of flight, which are not influenced by the height of the cliff. Hence, the correct answer is 30 m. Choice A, 10 m, is incorrect as it does not consider the time of flight. Choice B, 20 m, is incorrect as it does not account for the constant horizontal velocity. Choice D, 'Cannot be determined without knowing the height of the cliff,' is incorrect because the horizontal distance can be calculated independently of the height of the cliff.

Which of the following nutrients is essential for muscle growth and repair?

  • A. Vitamin C
  • B. Protein
  • C. Carbohydrates
  • D. Fat
Correct Answer: B

Rationale: Protein is essential for muscle growth and repair as it provides the necessary building blocks (amino acids) for muscle tissue synthesis and repair. While vitamins and minerals are crucial for overall health, protein has a specific role in muscle development. Carbohydrates supply energy for workouts, and fats are important for general health but are less directly involved in muscle growth and repair compared to protein.

What is the difference between a prokaryotic cell and a eukaryotic cell?

  • A. Prokaryotic cells have a nucleus, while eukaryotic cells do not
  • B. Eukaryotic cells have a nucleus, while prokaryotic cells do not.
  • C. Prokaryotic cells have membrane-bound organelles, while eukaryotic cells do not.
  • D. Eukaryotic cells have membrane-bound organelles, while prokaryotic cells do not.
Correct Answer: B

Rationale: - Prokaryotic cells are simpler and do not have a true nucleus. Their genetic material is located in the nucleoid region, which is not enclosed by a membrane.
- Eukaryotic cells are more complex and have a true nucleus that houses the genetic material, enclosed within a nuclear membrane.
- Both prokaryotic and eukaryotic cells have organelles, but eukaryotic cells have membrane-bound organelles such as mitochondria, endoplasmic reticulum, and Golgi apparatus, while prokaryotic cells lack these membrane-bound organelles.

What pigment is responsible for the yellow color of bananas?

  • A. Potassium
  • B. Calcium
  • C. Phosphorus
  • D. Carotene
Correct Answer: D

Rationale: Carotene is the pigment responsible for the yellow color of bananas. It belongs to a group of plant pigments called carotenoids, which are responsible for giving fruits and vegetables their vibrant colors, including the yellow hue of bananas. Potassium, calcium, and phosphorus are essential minerals found in bananas but are not responsible for their yellow color.

What property of a wave determines the loudness of sound when heard by the human ear?

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

Rationale: The amplitude of a wave determines the loudness of sound when heard by the human ear. The greater the amplitude of a sound wave, the louder the sound will be perceived. Frequency (Choice A) refers to the number of wave cycles in a given time period. Wavelength (Choice C) is the distance between two corresponding points on a wave. Velocity (Choice D) is the speed at which the wave travels and does not directly affect the loudness of sound perceived by the human ear.

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