ACBN Practice Questions 2

Question 1

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

Accepted Answer

Alpha-linolenic acid (ALA)

Answer

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

Question 2

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

Accepted Answer

Vitamin A

Answer

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

Question 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:

Accepted Answer

Estimated Average Requirement (EAR)

Answer

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.

Question 4

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

Accepted Answer

Salivary amylase

Answer

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

Question 5

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

Accepted Answer

Vitamin B12

Answer

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

ACBN - Nutritionist Exam Practice Test

ACBN - Nutritionist Exam Practice Test

ACBN Practice Questions 2