CDN Nutritional Science & Dietetics

Question 1

What is the primary function of carbohydrates in the human body?

Accepted Answer

To provide energy

Answer

Carbohydrates are the body's primary and most readily available source of energy. They are broken down into glucose, which cells use to produce ATP, fueling all metabolic processes and physical activities. This makes them essential for daily bodily functions.

Question 2

Which of the following is a function of proteins in the body?

Accepted Answer

Supporting enzyme and hormone production

Answer

Proteins are fundamental building blocks for a vast array of essential molecules in the body. They are crucial for synthesizing enzymes, which catalyze nearly all biochemical reactions, and many hormones, which regulate various physiological processes. Proteins also play vital roles in structural support, transport, and immune function.

Question 3

What role do vitamins play in metabolism?

Accepted Answer

They help enzymes perform metabolic functions

Answer

Vitamins do not provide energy directly but act as coenzymes or cofactors, assisting enzymes in performing their metabolic functions. They are crucial for facilitating biochemical reactions involved in energy production, nutrient utilization, and overall cellular health. Without adequate vitamins, metabolic processes would be severely impaired.

Question 4

How do lipids contribute to metabolism?

Accepted Answer

They store energy, form cell membranes, and produce hormones

Answer

Lipids are vital for several metabolic functions, including serving as a concentrated, long-term energy storage. They are also integral components of cell membranes, providing structural integrity and regulating substance passage. Furthermore, lipids are precursors for the synthesis of essential hormones, such as steroid hormones.

Question 5

What is the role of water in metabolism?

Accepted Answer

It regulates body temperature and aids digestion

Answer

Water is indispensable for countless metabolic reactions, acting as a solvent and transport medium for nutrients and waste products throughout the body. It also plays a critical role in thermoregulation, helping to maintain a stable body temperature, and is essential for the proper digestion and absorption of food.

(CDN) Certified Dietician Nutritionist Practice Test

(CDN) Certified Dietician Nutritionist Practice Test

CDN Nutritional Science & Dietetics