FREE CN Nutritional Science & Biochemistry Questions and Answers
What is the primary function of dietary fiber in the digestive system?
Dietary fiber aids in digestion by promoting bowel regularity, preventing constipation, and supporting a healthy gut microbiome.
Which mineral is a key component of hemoglobin and essential for oxygen transport?
Iron is a crucial component of hemoglobin, the protein in red blood cells responsible for carrying oxygen throughout the body.
Which macronutrient provides the highest energy yield per gram?
Fats provide 9 calories per gram, making them the most energy-dense macronutrient compared to proteins and carbohydrates, which provide 4 calories per gram each.
Which fatty acid is classified as essential because it must be obtained from the diet?
Omega-3 fatty acids, such as alpha-linolenic acid (ALA), are essential because the body cannot synthesize them, and they must be obtained from food sources.
Which vitamin is essential for collagen synthesis and wound healing?
Vitamin C plays a crucial role in collagen formation, which is necessary for wound healing, connective tissue maintenance, and skin health.
Which metabolic process converts glucose into energy in cells?
Cellular respiration, particularly glycolysis and the Krebs cycle, converts glucose into ATP, the energy currency of the cell.