Nokea
What differentiates one amino acid from another?
- A. The amine group
- B. The acid group
- C. The side chain
- D. None of the above
Correct Answer: C
Rationale: The side chain, also known as the R group, is what differentiates one amino acid from another. It imparts unique properties to each amino acid, thereby influencing their roles and functions in proteins. The amine group (Choice A) and the acid group (Choice B) are components of all amino acids and do not cause the differences among various amino acids. Choice D is incorrect as it suggests that none of the given options account for the differences, which is not true as the side chain does.
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Although a balanced diet is essential for tissue healing and repair, which of the following should the dental hygienist identify as the nutrient of highest priority for a patient with gingivitis or periodontal disease?
- A. Carbohydrates
- B. Vitamin C
- C. Vitamin D
- D. Monosaccharides
Correct Answer: B
Rationale: Vitamin C is crucial for collagen production and connective tissue repair, making it a key nutrient for healing gingival tissues in patients with gingivitis or periodontal disease. Carbohydrates are a source of energy and not directly related to tissue repair. Vitamin D is important for bone health but is not the highest priority for gingival tissue healing. Monosaccharides are simple sugars and not as essential for tissue repair as Vitamin C.
Which vitamin deficiency is most likely to cause bleeding disorders?
- A. Vitamin A
- B. Vitamin E
- C. Vitamin K
- D. Vitamin D
Correct Answer: C
Rationale: Vitamin K is essential for blood clotting as it plays a crucial role in the activation of clotting factors. Deficiency of Vitamin K can lead to impaired blood clotting, resulting in bleeding disorders. Vitamin A is more associated with vision and skin health, not blood clotting. Vitamin E is known for its antioxidant properties and role in immune function, not specifically related to bleeding disorders. Vitamin D plays a key role in calcium absorption and bone health, but it is not directly linked to blood clotting or bleeding disorders.
Which ethnic group has the lowest rates of type 2 diabetes?
- A. Caucasians
- B. Asian Indians
- C. Pacific Islanders
- D. African Americans
Correct Answer: A
Rationale: Statistical data suggest that Caucasians generally have lower rates of type 2 diabetes compared to the other ethnic groups listed in the choices. This is not to say that Caucasians are immune to the disease, but rather that they have fewer reported instances. On the other hand, African Americans and Pacific Islanders are often identified as groups with a significantly higher risk and prevalence of type 2 diabetes. Asian Indians also exhibit higher rates compared to Caucasians. It is important to note that these are general trends observed in statistical data, and individual health outcomes can vary based on various factors such as lifestyle, diet, and genetics, among others. Therefore, the correct answer is A: Caucasians because they generally have the lowest rates of type 2 diabetes when compared to the other ethnic groups mentioned.
Which systolic blood pressure measurement is classified as prehypertension?
- A. 106 mmHg
- B. 119 mmHg
- C. 130 mmHg
- D. 141 mmHg
Correct Answer: B
Rationale: According to the blood pressure classification, a systolic blood pressure between 120-139 mmHg is considered prehypertension. This range indicates an increased risk for developing hypertension if not managed appropriately. Therefore, a systolic blood pressure of 119 mmHg falls into the prehypertension category. A systolic pressure of 106 mmHg is within the normal range, while 130 mmHg and above would be classified as stage 1 and stage 2 hypertension respectively, not prehypertension.
Which of the following is NOT required on a food label or nutrition facts panel?
- A. Nutrition facts panel
- B. Ingredients in descending order by weight
- C. The % RDA of ALL the vitamins and minerals in the product
- D. Essential warnings, such as common allergies
Correct Answer: C
Rationale: According to food labeling regulations, every food label or nutrition facts panel must include a nutrition facts panel, list of ingredients in descending order by weight, and essential warnings such as common allergies. However, it is not mandatory to list the % Recommended Daily Allowance (RDA) of ALL the vitamins and minerals in the product. Only certain vitamins and minerals, deemed significant to public health, are required to be listed. Therefore, the notion that the % RDA of ALL vitamins and minerals must be displayed is incorrect. Choices A, B, and D are required elements on a food label, making them incorrect answers.