Biol 1322 Chapter 1: Comprehensive Smartbook Practice Questions (200 Mcqs With Answers & Explanations)

BIOL 1322 CHAPTER 1: COMPREHENSIVE SMARTBOOK PRACTICE QUESTIONS (200 MCQS WITH ANSWERS & EXPLANATIONS) 1. What is the second leading cause of death in America? A) Heart disease B) Cancer C) Stroke D) Diabetes Correct Answer: B) Cancer Explanation: Cancer is the second leading cause of death in the United States, following heart disease. ________________________________________ 2. Which system of measurement is used in nutrition? A) Imperial System B) Metric System C) US Customary System D) Avoirdupois System Correct Answer: B) Metric System Explanation: The metric system is the standard for scientific and nutrition-related measurements. ________________________________________ 3. What is the term for improper nourishment, including both undernutrition and overnutrition? A) Overnutrition B) Malnutrition C) Undernutrition D) Dysnutrition Correct Answer: B) Malnutrition Explanation: Malnutrition refers to any imbalance in nutrient intake, whether excess or deficiency. ________________________________________ 4. How many kilocalories are in 10 grams of carbohydrates? A) 30 kcal B) 40 kcal C) 50 kcal D) 60 kcal Correct Answer: B) 40 kcal Explanation: Carbohydrates provide 4 kcal per gram, so 10 g × 4 = 40 kcal. ________________________________________ 5. How many kilocalories are in 5 grams of fat? A) 35 kcal B) 40 kcal C) 45 kcal D) 50 kcal Correct Answer: C) 45 kcal Explanation: Fat provides 9 kcal per gram, so 5 g × 9 = 45 kcal. ________________________________________ 6. How many kilocalories are in 4 grams of protein? A) 12 kcal B) 14 kcal C) 16 kcal D) 18 kcal Correct Answer: C) 16 kcal Explanation: Protein provides 4 kcal per gram, so 4 g × 4 = 16 kcal. ________________________________________ 7. Which populations are at increased risk of undernutrition? A) Athletes and teenagers B) Americans with low income, individuals with anorexia nervosa, and chronic alcoholics C) Elderly living in nursing homes D) Pregnant women only Correct Answer: B) Americans with low income, individuals with anorexia nervosa, and chronic alcoholics Explanation: These groups face barriers to adequate nutrition due to financial, psychological, or health-related issues. ________________________________________ 8. What happens when energy intake exceeds energy expenditure? A) Body fat decreases B) Body fat increases C) Muscle mass increases D) No change occurs Correct Answer: B) Body fat increases Explanation: Excess calories are stored as fat, leading to weight gain. ________________________________________ 9. Which of the following can be achieved by making certain dietary changes? A) Only weight loss B) Lessen disease severity, forestall disease development, and cure severe acute diseases C) Only prevent heart disease D) Only cure chronic diseases Correct Answer: B) Lessen disease severity, forestall disease development, and cure severe acute diseases Explanation: Diet can influence disease outcomes in multiple ways, not just weight management. ________________________________________ 10. How many kcal per gram do carbohydrates provide? A) 2 kcal B) 4 kcal C) 6 kcal D) 8 kcal Correct Answer: B) 4 kcal Explanation: Carbohydrates are a primary energy source, providing 4 kcal per gram. ________________________________________ 11. How many kcal per gram do proteins provide? A) 3 kcal B) 4 kcal C) 5 kcal D) 7 kcal Correct Answer: B) 4 kcal