Practice Test GeeksACBN - Nutritionist Exam Practice Test
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7 cards from real ACBN practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. Which fatty acid is considered the primary omega-3 precursor that the body uses to synthesize EPA and DHA?

    Answer: Alpha-linolenic acid (ALA)

    Alpha-linolenic acid (ALA) is the essential omega-3 fatty acid that serves as the precursor for EPA and DHA synthesis in the body.

  2. A patient presents with night blindness and dry, rough skin. Which vitamin deficiency is most likely responsible?

    Answer: Vitamin A

    Vitamin A deficiency causes night blindness and xerosis (dry skin) because retinol is essential for rhodopsin synthesis and epithelial cell integrity.

  3. The Dietary Reference Intake term that represents the average daily intake sufficient to meet the needs of 50% of healthy individuals is called the:

    Answer: Estimated Average Requirement (EAR)

    The Estimated Average Requirement (EAR) is the intake that meets the needs of 50% of the healthy population, and it forms the basis for calculating the RDA.

  4. Which enzyme is responsible for the initial digestion of starch in the mouth?

    Answer: Salivary amylase

    Salivary amylase (ptyalin) begins carbohydrate digestion in the oral cavity by cleaving alpha-1,4-glycosidic bonds in starch.

  5. A client following a strict vegan diet is at greatest risk of deficiency in which nutrient?

    Answer: Vitamin B12

    Vitamin B12 is found almost exclusively in animal products, making vegans highly susceptible to deficiency without supplementation.

  6. The thermic effect of food (TEF) accounts for approximately what percentage of total daily energy expenditure in most individuals?

    Answer: 5-10%

    The thermic effect of food typically represents 5-10% of total energy expenditure, reflecting the metabolic cost of digesting, absorbing, and storing nutrients.

  7. Which mineral is a critical component of glutathione peroxidase, an antioxidant enzyme that protects cells from oxidative damage?

    Answer: Selenium

    Selenium is an essential component of glutathione peroxidase, which catalyzes the reduction of hydrogen peroxide and lipid peroxides to protect cells from oxidative stress.