NUFT 204 Exam #1 Questions With Complete Solutions
Course
NUFT 204
Question 1
Q: What is the primary function of carbohydrates in the human body?
A: The primary function of carbohydrates is to provide energy.
Rationale: Carbohydrates are the body's main source of energy, providing 4 calories per
gram. They are broken down into glucose, which is utilized by the body's cells for energy.
Question 2
Q: Which vitamin is essential for the absorption of calcium in the body?
A: Vitamin D.
Rationale: Vitamin D enhances the intestinal absorption of calcium and phosphorus, which
are critical for maintaining bone health.
Question 3
Q: What is the Recommended Dietary Allowance (RDA) for protein for an average adult?
A: 0.8 grams of protein per kilogram of body weight.
Rationale: The RDA for protein is set to meet the nutritional needs of 97-98% of healthy
individuals, and 0.8 g/kg is the amount recommended for maintaining muscle mass and
overall health.
Question 4
Q: What is the main health concern associated with excessive sodium intake?
A: Hypertension (high blood pressure).
Rationale: High sodium intake can lead to increased blood pressure, which is a risk factor for
cardiovascular diseases.
Question 5
Q: Which food group is the best source of omega-3 fatty acids?
A: Fatty fish (such as salmon, mackerel, and sardines).
Rationale: Fatty fish are rich in EPA and DHA, types of omega-3 fatty acids that have been
shown to reduce inflammation and improve heart health.
,Question 6
Q: What is the role of dietary fiber in the digestive system?
A: It aids in digestion and helps prevent constipation.
Rationale: Dietary fiber adds bulk to the stool and promotes regular bowel movements,
contributing to overall digestive health.
Question 7
Q: Which mineral is crucial for oxygen transport in the blood?
A: Iron.
Rationale: Iron is a key component of hemoglobin, the protein in red blood cells that binds
to oxygen and transports it throughout the body.
Question 8
Q: What is the primary difference between fat-soluble and water-soluble vitamins?
A: Fat-soluble vitamins are stored in the body's fatty tissues, while water-soluble vitamins are
not.
Rationale: Fat-soluble vitamins (A, D, E, K) can be stored in the body for later use, whereas
water-soluble vitamins (B-complex and C) are not stored and must be consumed regularly.
Question 9
Q: What is the significance of the glycemic index in nutrition?
A: It measures how quickly a carbohydrate-containing food raises blood glucose levels.
Rationale: The glycemic index helps in understanding how different foods affect blood sugar
levels, which is particularly important for individuals with diabetes.
Question 10
Q: What are trans fats, and why are they considered unhealthy?
A: Trans fats are artificially created fats that can increase bad cholesterol (LDL) and lower
good cholesterol (HDL).
Rationale: Trans fats are associated with an increased risk of heart disease, leading to many
countries implementing bans or restrictions on their use in food products.
Question 11
Q: What is the primary source of saturated fats in the diet?
A: Animal products such as meat, butter, and cheese.
,Rationale: Saturated fats are primarily found in animal products and some tropical oils, and
excessive intake can raise LDL cholesterol levels, increasing heart disease risk.
Question 12
Q: Which nutrient is essential for thyroid hormone production?
A: Iodine.
Rationale: Iodine is crucial for the synthesis of thyroid hormones, which regulate
metabolism and energy production in the body.
Question 13
Q: What is the recommended limit for added sugars in the diet according to the Dietary
Guidelines for Americans?
A: Less than 10% of total daily calories.
Rationale: Limiting added sugars helps reduce the risk of chronic diseases such as obesity,
heart disease, and diabetes.
Question 14
Q: Which of the following is a good source of complete protein?
A: Quinoa.
Rationale: Quinoa is considered a complete protein because it contains all nine essential
amino acids in sufficient quantities, making it a great option for vegetarians and vegans.
Question 15
Q: What is the primary function of antioxidants in the body?
A: To protect cells from oxidative damage.
Rationale: Antioxidants neutralize free radicals, which can damage cells and contribute to
aging and diseases such as cancer.
Question 16
Q: How many calories are in one gram of fat?
A: 9 calories.
Rationale: Fat is energy-dense, providing more than double the calories per gram compared
to carbohydrates and proteins, which each provide 4 calories per gram.
, Question 17
Q: What is the main function of Vitamin K in the body?
A: To aid in blood clotting.
Rationale: Vitamin K is essential for the synthesis of certain proteins that are required for
blood coagulation and bone metabolism.
Question 18
Q: Which dietary pattern is associated with a reduced risk of chronic diseases?
A: The Mediterranean diet.
Rationale: The Mediterranean diet emphasizes whole grains, fruits, vegetables, healthy fats,
and lean proteins, which have been linked to lower rates of heart disease and diabetes.
Question 19
Q: What is the most common cause of vitamin B12 deficiency?
A: Insufficient dietary intake, particularly in vegetarians and vegans.
Rationale: Vitamin B12 is primarily found in animal products, and those not consuming
these foods may develop a deficiency without supplementation.
Question 20
Q: What is the role of probiotics in the diet?
A: They promote a healthy gut microbiome.
Rationale: Probiotics are live bacteria that confer health benefits, particularly by enhancing
gut health and digestion.
Question 21
Q: What is the main component of the cell membrane?
A: Phospholipids.
Rationale: Phospholipids form a bilayer that makes up the cell membrane, providing
structure and regulating the movement of substances in and out of the cell.
Question 22
Course
NUFT 204
Question 1
Q: What is the primary function of carbohydrates in the human body?
A: The primary function of carbohydrates is to provide energy.
Rationale: Carbohydrates are the body's main source of energy, providing 4 calories per
gram. They are broken down into glucose, which is utilized by the body's cells for energy.
Question 2
Q: Which vitamin is essential for the absorption of calcium in the body?
A: Vitamin D.
Rationale: Vitamin D enhances the intestinal absorption of calcium and phosphorus, which
are critical for maintaining bone health.
Question 3
Q: What is the Recommended Dietary Allowance (RDA) for protein for an average adult?
A: 0.8 grams of protein per kilogram of body weight.
Rationale: The RDA for protein is set to meet the nutritional needs of 97-98% of healthy
individuals, and 0.8 g/kg is the amount recommended for maintaining muscle mass and
overall health.
Question 4
Q: What is the main health concern associated with excessive sodium intake?
A: Hypertension (high blood pressure).
Rationale: High sodium intake can lead to increased blood pressure, which is a risk factor for
cardiovascular diseases.
Question 5
Q: Which food group is the best source of omega-3 fatty acids?
A: Fatty fish (such as salmon, mackerel, and sardines).
Rationale: Fatty fish are rich in EPA and DHA, types of omega-3 fatty acids that have been
shown to reduce inflammation and improve heart health.
,Question 6
Q: What is the role of dietary fiber in the digestive system?
A: It aids in digestion and helps prevent constipation.
Rationale: Dietary fiber adds bulk to the stool and promotes regular bowel movements,
contributing to overall digestive health.
Question 7
Q: Which mineral is crucial for oxygen transport in the blood?
A: Iron.
Rationale: Iron is a key component of hemoglobin, the protein in red blood cells that binds
to oxygen and transports it throughout the body.
Question 8
Q: What is the primary difference between fat-soluble and water-soluble vitamins?
A: Fat-soluble vitamins are stored in the body's fatty tissues, while water-soluble vitamins are
not.
Rationale: Fat-soluble vitamins (A, D, E, K) can be stored in the body for later use, whereas
water-soluble vitamins (B-complex and C) are not stored and must be consumed regularly.
Question 9
Q: What is the significance of the glycemic index in nutrition?
A: It measures how quickly a carbohydrate-containing food raises blood glucose levels.
Rationale: The glycemic index helps in understanding how different foods affect blood sugar
levels, which is particularly important for individuals with diabetes.
Question 10
Q: What are trans fats, and why are they considered unhealthy?
A: Trans fats are artificially created fats that can increase bad cholesterol (LDL) and lower
good cholesterol (HDL).
Rationale: Trans fats are associated with an increased risk of heart disease, leading to many
countries implementing bans or restrictions on their use in food products.
Question 11
Q: What is the primary source of saturated fats in the diet?
A: Animal products such as meat, butter, and cheese.
,Rationale: Saturated fats are primarily found in animal products and some tropical oils, and
excessive intake can raise LDL cholesterol levels, increasing heart disease risk.
Question 12
Q: Which nutrient is essential for thyroid hormone production?
A: Iodine.
Rationale: Iodine is crucial for the synthesis of thyroid hormones, which regulate
metabolism and energy production in the body.
Question 13
Q: What is the recommended limit for added sugars in the diet according to the Dietary
Guidelines for Americans?
A: Less than 10% of total daily calories.
Rationale: Limiting added sugars helps reduce the risk of chronic diseases such as obesity,
heart disease, and diabetes.
Question 14
Q: Which of the following is a good source of complete protein?
A: Quinoa.
Rationale: Quinoa is considered a complete protein because it contains all nine essential
amino acids in sufficient quantities, making it a great option for vegetarians and vegans.
Question 15
Q: What is the primary function of antioxidants in the body?
A: To protect cells from oxidative damage.
Rationale: Antioxidants neutralize free radicals, which can damage cells and contribute to
aging and diseases such as cancer.
Question 16
Q: How many calories are in one gram of fat?
A: 9 calories.
Rationale: Fat is energy-dense, providing more than double the calories per gram compared
to carbohydrates and proteins, which each provide 4 calories per gram.
, Question 17
Q: What is the main function of Vitamin K in the body?
A: To aid in blood clotting.
Rationale: Vitamin K is essential for the synthesis of certain proteins that are required for
blood coagulation and bone metabolism.
Question 18
Q: Which dietary pattern is associated with a reduced risk of chronic diseases?
A: The Mediterranean diet.
Rationale: The Mediterranean diet emphasizes whole grains, fruits, vegetables, healthy fats,
and lean proteins, which have been linked to lower rates of heart disease and diabetes.
Question 19
Q: What is the most common cause of vitamin B12 deficiency?
A: Insufficient dietary intake, particularly in vegetarians and vegans.
Rationale: Vitamin B12 is primarily found in animal products, and those not consuming
these foods may develop a deficiency without supplementation.
Question 20
Q: What is the role of probiotics in the diet?
A: They promote a healthy gut microbiome.
Rationale: Probiotics are live bacteria that confer health benefits, particularly by enhancing
gut health and digestion.
Question 21
Q: What is the main component of the cell membrane?
A: Phospholipids.
Rationale: Phospholipids form a bilayer that makes up the cell membrane, providing
structure and regulating the movement of substances in and out of the cell.
Question 22
