Question 1

Which of the following best describes the difference between the Estimated Average Requirement (EAR) and the Recommended Dietary Allowance (RDA) in the Dietary Reference Intakes (DRIs)?

Accepted Answer

EAR is the average daily nutrient intake estimated to meet the requirement of half the healthy individuals in a group, while RDA is set higher to cover nearly all (97-98%) individuals.

Question 2

A patient with lactose intolerance consumes a meal containing lactose. Which digestive process is most directly impaired, and what is the likely physiological consequence?

Accepted Answer

Lactase activity in the small intestine is reduced, resulting in undigested lactose reaching the colon and causing gas and diarrhea.

Question 3

Which of the following best explains why vitamin C is easily destroyed during cooking?

Accepted Answer

Vitamin C is sensitive to heat, light, and oxygen, leading to its degradation during cooking.

Question 4

A food label claims 'high in fiber.' According to FDA regulations, which of the following must be true per serving?

Accepted Answer

The food contains at least 5 grams of fiber per serving.

Question 5

Which of the following equations correctly represents the calculation of Body Mass Index (BMI) in metric units?

Accepted Answer

$$BMI = \frac{weight\ (kg)}{height\ (m)^2$}$$

Question 6

A chef wants to reduce the formation of trans fats in a baked product. Which of the following ingredient or process modifications would be most effective?

Accepted Answer

Replace solid fats with liquid vegetable oils and avoid hydrogenation.

Question 7

Which of the following best describes the Maillard reaction in cooking?

Accepted Answer

A reaction between amino acids and reducing sugars that produces browning and complex flavors.

Question 8

A 35-year-old woman is diagnosed with iron-deficiency anemia. Which dietary strategy would most effectively enhance her non-heme iron absorption?

Accepted Answer

Consuming non-heme iron sources with vitamin C-rich foods.

Question 9

Which of the following statements about omega-3 fatty acids is correct?

Accepted Answer

They are essential fatty acids found in high amounts in flaxseed, walnuts, and fatty fish.

Question 10

A patient presents with symptoms of night blindness and frequent infections. Which micronutrient deficiency is most likely responsible?

Accepted Answer

Vitamin A

Question 11

Which of the following best explains why older adults are at increased risk for vitamin B12 deficiency?

Accepted Answer

They often have reduced gastric acid production, impairing B12 absorption from food.

Question 12

Which of the following is a primary function of HDL (high-density lipoprotein) in lipid transport?

Accepted Answer

Removes cholesterol from tissues and returns it to the liver for excretion.

Question 13

A 22-year-old athlete wants to maximize muscle protein synthesis after resistance training. Which meal composition is most effective?

Accepted Answer

A meal containing both high-quality protein and carbohydrates.

Question 14

Which of the following best describes the DASH diet's primary goal?

Accepted Answer

To lower blood pressure by emphasizing fruits, vegetables, and low-fat dairy while reducing sodium.

Question 15

A food scientist is developing a gluten-free bread. Which ingredient substitution would best mimic the structure provided by gluten?

Accepted Answer

Use xanthan gum or guar gum to provide elasticity and structure.

Question 16

Which of the following is the correct formula for calculating Total Energy Expenditure (TEE)?

Accepted Answer

$$TEE = BMR + TEF + physical\ activity$$

Question 17

A 28-year-old vegan is concerned about meeting her protein needs. Which of the following strategies would best ensure she consumes all essential amino acids?

Accepted Answer

Combine different plant protein sources (e.g., beans and rice) to provide complementary amino acids.

Question 18

Which of the following best describes the role of antioxidants in chronic disease prevention?

Accepted Answer

They neutralize free radicals, reducing oxidative stress and cellular damage.

Question 19

A 60-year-old man is diagnosed with osteoporosis. Which combination of nutrients is most critical for improving his bone health?

Accepted Answer

Calcium and vitamin D

Question 20

Which of the following best explains why plant-based diets are considered more environmentally sustainable than diets high in animal products?

Accepted Answer

Plant-based diets require less land, water, and energy, and produce fewer greenhouse gas emissions.

Comprehensive Study Guide: Foundations and Applications of Nutrition Science

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