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Nursing Elites

ATI TEAS 7

Chemistry

1. Elements tend to gain or lose electrons to achieve stable electron configurations like those of noble gases. Their group number often indicates the number of electrons gained/lost and the resulting ionic charge, providing a good starting point for prediction.

Correct answer: D

Rationale: Ionic bonds involve complete electron transfer between atoms, creating strong, non-directional electrostatic attraction. Metallic bonds involve a delocalized "sea" of electrons shared across all metal atoms, resulting in a strong, extended structure.

2. What is the structure that attaches to each chromosome during mitosis?

Correct answer: A

Rationale: Rationale: The centromere is the structure that attaches to each chromosome during mitosis. It is a region of the chromosome where the two sister chromatids are held together and where the spindle fibers attach during cell division. The centromere plays a crucial role in ensuring that each daughter cell receives the correct number of chromosomes during cell division. Telomeres are structures found at the ends of chromosomes that protect them from deterioration and fusion with neighboring chromosomes. The spindle apparatus is a structure made of microtubules that helps separate chromosomes during cell division. The nucleolus is a region within the nucleus where ribosomal RNA synthesis occurs and is not directly involved in chromosome attachment during mitosis.

3. Which of the following is a functional group commonly found in alcohols?

Correct answer: B

Rationale: The hydroxyl functional group (OH) is commonly found in alcohols. The other choices are associated with different functional groups.

4. The author's tone towards UBI can be described as

Correct answer: D

Rationale: The passage acknowledges both positive and negative aspects of UBI, suggesting a cautious and balanced perspective, aligning with D.

5. Which of the following is the main function of the stomach?

Correct answer: A

Rationale: Rationale: The main function of the stomach is to store food that has been ingested and mechanically break it down into smaller pieces through the process of churning and mixing with gastric juices. This mechanical breakdown, along with the action of stomach acid and enzymes, helps to initiate the digestion of food before it moves on to the small intestine for further digestion and absorption of nutrients. Absorption of nutrients into the bloodstream primarily occurs in the small intestine, not the stomach. The production of enzymes that help digest food primarily occurs in the pancreas and small intestine, not the stomach. The elimination of waste products from the body primarily occurs through the large intestine and rectum, not the stomach.

6. Dense irregular connective tissue, found in tendons and ligaments, provides:

Correct answer: D

Rationale: The correct answer is D: 'Tensile strength.' Dense irregular connective tissue is composed of tightly packed collagen fibers arranged in a random pattern, providing resistance to tension forces. This structural arrangement is ideal for tendons and ligaments, as they need to withstand pulling and stretching forces. 'Flexibility' (A) is more characteristic of elastic fibers, 'Lubrication' (B) is provided by synovial fluid in joints, and 'Insulation' (C) is typically associated with adipose tissue. Therefore, tensile strength is the primary function of dense irregular connective tissue in tendons and ligaments.

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