ACBN Nutrition Science Fundamentals Flashcards
6 cards from real ACBN practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 ACBN Nutrition Science Fundamentals flashcards as text
Which macronutrient provides 4 kcal per gram and serves as the primary energy source for the brain?
Answer: Carbohydrates
Carbohydrates provide 4 kcal/g and glucose derived from them is the preferred fuel for brain function.
The Recommended Dietary Allowance (RDA) for protein in healthy adults is approximately:
Answer: 0.8 g/kg body weight/day
The RDA for protein in healthy adults is 0.8 g/kg body weight per day as established by the DRI.
Which vitamin is synthesized in the skin upon exposure to ultraviolet B (UVB) radiation?
Answer: Vitamin D
Vitamin D3 (cholecalciferol) is synthesized in the skin from 7-dehydrocholesterol when exposed to UVB radiation.
The process by which fatty acids are broken down to produce acetyl-CoA for energy is called:
Answer: Beta-oxidation
Beta-oxidation is the metabolic pathway in the mitochondria that sequentially cleaves two-carbon units from fatty acid chains.
Which mineral is a cofactor for over 300 enzymatic reactions and is found abundantly in nuts and whole grains?
Answer: Magnesium
Magnesium serves as a cofactor in over 300 enzyme systems and is particularly abundant in nuts, seeds, and whole grains.
The thermic effect of food (TEF) accounts for approximately what percentage of total daily energy expenditure?
Answer: 10%
TEF typically accounts for about 10% of total daily energy expenditure, representing the energy cost of digesting and metabolizing food.