ATI TEAS 7
Biology
1. Which of the following is the main function of the skin?
- A. To protect the body from harm
- B. To regulate body temperature
- C. To produce hormones
- D. To sense touch, temperature, and pain
Correct answer: A
Rationale: Rationale: A) To protect the body from harm: The skin acts as a physical barrier that protects the body from external threats such as pathogens, UV radiation, and physical injuries. It helps prevent infections and dehydration, making it a crucial function of the skin. B) To regulate body temperature: While the skin does play a role in regulating body temperature through processes like sweating and vasodilation/vasoconstriction, its primary function is protection. C) To produce hormones: Hormone production is primarily carried out by endocrine glands such as the pituitary gland, thyroid gland, and adrenal glands, not the skin. D) To sense touch, temperature, and pain: The skin contains sensory receptors that allow us to perceive touch, temperature, and pain, but this function is secondary to its main role of protecting the body from harm.
2. What is the principle behind the phenomenon of refraction, where waves bend when entering a new medium?
- A. Change in wavelength
- B. Change in frequency
- C. Change in wave speed
- D. None of the above
Correct answer: C
Rationale: Refraction occurs because of the change in wave speed as it enters a new medium, causing the wavefront to bend and change direction.
3. An element with atomic number 26 and mass number 56 is most likely to be:
- A. Iron (Fe)
- B. Cobalt (Co)
- C. Nickel (Ni)
- D. Manganese (Mn)
Correct answer: A
Rationale: Iron (Fe) - Fe-56 has 26 protons and aligns with the given atomic number and mass number.
4. What is the process of converting DNA into a protein called?
- A. Transcription
- B. Translation
- C. Replication
- D. Mutation
Correct answer: A
Rationale: Transcription is the process of converting DNA into a molecule called messenger RNA (mRNA). This mRNA molecule carries the genetic information from DNA to the ribosomes, where it is used to make proteins.
5. Acids are generally characterized by a sour taste and the ability to:
- A. Turn litmus paper blue
- B. Conduct electricity in solution
- C. Neutralize bases
- D. React explosively with metals
Correct answer: B
Rationale: Acids release hydrogen ions (H+) in solution, allowing electrical conductivity
6. What property of a wave remains unchanged when it passes from one medium to another with the same speed?
- A. Frequency
- B. Wavelength
- C. Amplitude
- D. Speed
Correct answer: d
Rationale: The speed of a wave remains constant when passing from one medium to another with the same speed.
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