Q: Which equation best represents the process of photosynthesis, through which glucose is produced in plants?

$$6\ \text{CO}_2 + 6\ \text{H}_2\text{O} \rightarrow C_6H_{12}O_6$ + 6\ \text{O}_2$$

Q: Calculate the minimum daily carbohydrate requirement for an adult, given that the brain requires at least 130 grams per day. If an adult consumes 2,000 calories daily, what percentage of calories should come from carbohydrates to meet this minimum?

$$\frac{130\ \text{g} \times 4\ \text{kcal/g}}{2000\ \text{kcal}} \times 100 = 26\%$$

Question 1

Which equation best represents the process of photosynthesis, through which glucose is produced in plants?

Accepted Answer

$$6\ 	ext{CO}_2 + 6\ 	ext{H}_2	ext{O} ightarrow C_6H_{12}O_6$ + 6\ 	ext{O}_2$$

Question 2

Which of the following is a correct example of a soluble, fermentable, and viscous fiber, and what is its primary health benefit?

Accepted Answer

Pectin; lowers blood cholesterol by binding bile acids

Question 3

A patient with lactose malabsorption will most likely experience which of the following symptoms after consuming dairy, and what is the underlying cause?

Accepted Answer

Bloating and diarrhea due to insufficient lactase enzyme in the small intestine

Question 4

Which hormone is released when blood glucose levels fall, and what is its primary action?

Accepted Answer

Glucagon; stimulates glycogen breakdown in the liver to release glucose

Question 5

A person following a low-carbohydrate diet is at risk for ketosis. Which of the following best describes ketone bodies and their formation?

Accepted Answer

Ketone bodies are produced from fatty acids when carbohydrate intake is insufficient for energy needs

Question 6

Calculate the minimum daily carbohydrate requirement for an adult, given that the brain requires at least 130 grams per day. If an adult consumes 2,000 calories daily, what percentage of calories should come from carbohydrates to meet this minimum?

Accepted Answer

$$\frac{130\ 	ext{g} 	imes 4\ 	ext{kcal/g}}{2000\ 	ext{kcal}} 	imes 100 = 26\%$$

Question 7

Which of the following best explains why whole grains are considered healthier than refined grains?

Accepted Answer

Whole grains retain the bran and germ, providing more fiber, vitamins, and minerals

Question 8

Dental caries are most likely to form when:

Accepted Answer

Bacteria in the mouth metabolize sugars, producing acids that erode tooth enamel

Question 9

Which of the following is a risk factor for Type II Diabetes?

Accepted Answer

Obesity, physical inactivity, and family history

Question 10

How does dietary fiber help prevent diverticulitis?

Accepted Answer

Fiber increases stool bulk, reducing pressure in the colon and preventing formation of diverticula

Question 11

Which of the following best describes the molecular difference between saturated and unsaturated fatty acids?

Accepted Answer

Saturated fatty acids have no double bonds between carbon atoms; unsaturated fatty acids have one or more double bonds

Question 12

Which of the following is an essential fatty acid, and why is it considered essential?

Accepted Answer

Linoleic acid; it cannot be synthesized by the human body and must be obtained from the diet

Question 13

Which lipoprotein is responsible for transporting cholesterol from the liver to tissues, and is associated with increased risk of cardiovascular disease?

Accepted Answer

Low-density lipoprotein (LDL)

Question 14

A diet high in trans-fats is concerning because:

Accepted Answer

Trans-fats increase LDL cholesterol and decrease HDL cholesterol, raising risk of heart disease

Question 15

Which equation is used to estimate an individual's daily protein needs?

Accepted Answer

$$	ext{Protein (g)} = 	ext{Body weight (kg)} 	imes 0.8$$

Question 16

Which of the following best describes a limiting amino acid in a food protein?

Accepted Answer

The essential amino acid present in the lowest proportion relative to human needs

Question 17

A vegetarian diet may increase the risk of deficiency in which nutrients?

Accepted Answer

Vitamin B12, iron, and zinc

Question 18

Which of the following best describes the process of protein denaturation?

Accepted Answer

Loss of protein structure due to heat, acid, or mechanical agitation, resulting in loss of function

Question 19

Which of the following is a characteristic of metabolic syndrome?

Accepted Answer

A cluster of conditions including high blood pressure, high blood sugar, excess abdominal fat, and abnormal cholesterol levels

Question 20

Which of the following is a primary reason the Mediterranean diet is considered healthy?

Accepted Answer

It emphasizes fruits, vegetables, whole grains, healthy fats, and limits saturated fat and processed foods

Step-by-Step Guidance for Nutrition Study Guide (Carbohydrates, Fats, Proteins)

Study Guide - Practice Questions

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