ATI TEAS 7
Chemistry
1. Which element is a critical component of DNA and RNA, essential for storing and transmitting genetic information?
- A. Oxygen
- B. Carbon
- C. Nitrogen
- D. Hydrogen
Correct answer: B
Rationale: Carbon's ability to form diverse bonds makes it the backbone of genetic molecules, enabling efficient information storage and transmission
2. What property of a substance remains constant regardless of changes in its shape or size?
- A. Mass
- B. Weight
- C. Density
- D. Volume
Correct answer: a
Rationale: Mass remains constant regardless of changes in an object's shape or size.
3. Which hormone is responsible for regulating blood sugar levels and is produced by the pancreas?
- A. Insulin
- B. Glucagon
- C. Testosterone
- D. Estrogen
Correct answer: A
Rationale: The correct answer is A: Insulin. Insulin is a hormone produced by the pancreas that plays a crucial role in regulating blood sugar levels. When blood sugar levels rise after a meal, insulin is released to help cells absorb glucose for energy or storage. This process helps to lower blood sugar levels. Glucagon, the hormone mentioned in option B, is also produced by the pancreas but has the opposite effect of raising blood sugar levels when they are too low. Testosterone and estrogen, options C and D, are sex hormones and are not directly involved in regulating blood sugar levels.
4. Identify the pronoun in the following sentence: She quickly finished her homework before dinner.
- A. quickly
- B. finished
- C. her
- D. before
Correct answer: C
Rationale: Pronouns take the place of nouns. "Her" replaces a specific female person's name.
5. One leadership theory states that “leaders are born and not made,†which refers to which of the
- A. Trait
- B. Charismatic
- C. Great Man
- D. Situational
Correct answer: A
Rationale: The correct answer is A: Trait. The statement 'leaders are born and not made' aligns with the Trait theory of leadership, which suggests that certain individuals are born with innate qualities and characteristics that make them effective leaders. This theory focuses on identifying specific traits, such as intelligence, charisma, and self-confidence, that are believed to be inherent in successful leaders. Charismatic leadership (option B) emphasizes the charm and appeal of a leader, Great Man theory (option C) suggests that leaders are born with unique qualities that set them apart, and Situational leadership (option D) focuses on adapting leadership style based on the situation. However, the statement in the question best corresponds to the Trait theory, making option A the correct choice.
6. The K-capture process, a type of electron capture, involves the capture of an electron from which electron shell:
- A. The outermost s-orbital
- B. An inner p-orbital
- C. An inner d-orbital
- D. Any available electron shell
Correct answer: A
Rationale: The K-capture process involves the capture of an electron from the innermost electron shell, known as the K-shell. The K-shell is represented by the outermost s-orbital in an atom's electron configuration. When an electron from the K-shell is captured, it results in the transition of a proton to a neutron in the nucleus, thereby changing the atomic number of the element. Therefore, option A, 'The outermost s-orbital,' is the correct answer as it accurately describes the electron shell involved in the K-capture process.
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