Correct Answer: C

Rationale: The correct answer is C: corn chips. Corn chips, especially those processed and fried, are a common source of trans fats, which are associated with an increased risk of heart disease. Red meat (choice A) and salmon (choice D) do not typically contain trans fats unless they are processed or cooked in trans fat-containing oils. Peanut oil (choice B) can be a healthier option compared to trans fat-containing oils.

Correct Answer: B

Rationale: An LDL cholesterol level of less than 110 mg/dL is considered acceptable and healthy for children and adolescents. This level helps reduce the risk of cardiovascular diseases. Choices A, C, and D are incorrect because an LDL cholesterol level below 110 mg/dL is the recommended target for children and adolescents to maintain good heart health.

Correct Answer: B

Rationale: The correct answer is B: sulfur. Sulfur-containing amino acids like cysteine and methionine play a crucial role in forming disulfide bonds within proteins. These bonds are essential for the proper folding and structural stability of proteins. Phosphorus (choice A), selenium (choice C), and iron (choice D) do not directly contribute to shaping proteins through bond formation.

Correct Answer: C

Rationale: Protein is crucial for tissue repair and recovery after surgery. Proteins provide the building blocks necessary for tissue healing and regeneration. Fats are important for various bodily functions but are not as directly involved in tissue repair as proteins. Carbohydrates provide energy but do not play a primary role in tissue healing. Fiber is essential for digestive health but is not a nutrient that directly promotes tissue repair.

Correct Answer: D

Rationale: Osmotic pressure is the force that drives water movement across cell membranes due to the presence of electrolytes, helping to balance fluid levels in the body. Choice A, 'energy,' is incorrect as electrolytes do not directly create energy. Choice B, 'active transport,' refers to the movement of molecules across a cell membrane requiring energy, not the movement of water. Choice C, 'passive diffusion,' is the process by which substances move from an area of higher concentration to lower concentration, not related to the movement of water following electrolytes.