Protein Quiz
Questions: 16 · 10 minutes
1. A shopper wants to add more plant protein to a meal without using a meat substitute. Which swap is likely to make the biggest difference?
Replace some white rice with lentils
Replace olive oil with avocado
Replace an apple with a pear
Replace carrots with cucumber
2. Which substance begins significant protein digestion in the stomach?
Insulin
Bile
Pepsin
Lactase
3. Which essential amino acid is commonly relatively limited in many legumes?
Leucine
Lysine
Tryptophan
Methionine
4. Four products list the following protein amounts. Which has the highest protein density by weight?
9 grams of protein per 50-gram serving
12 grams of protein per 80-gram serving
20 grams of protein per 200-gram serving
18 grams of protein per 90-gram serving
5. What generally happens when heat denatures a food protein during cooking?
The protein turns entirely into carbohydrate
Every amino acid in the protein is destroyed
The protein gains additional essential amino acids
Its three-dimensional structure changes without usually eliminating its amino acids
6. Which food is generally considered a complete plant protein because it provides all nine essential amino acids?
Soybeans
Almonds
Wheat gluten
Lentils
7. A person wants to distribute protein more evenly across breakfast, lunch, and dinner. Which approach best matches that goal?
Eat nearly all protein at dinner and only fruit earlier
Include a meaningful protein source at each main meal
Skip breakfast so lunch protein is absorbed more efficiently
Use protein foods at lunch only and carbohydrates at other meals
8. Which pair of factors is most important when evaluating protein quality?
Total calories and percentage of water
Cooking time and carbohydrate content
Package size and total food weight
Essential amino acid profile and digestibility
9. Someone wants a vegan lunch with a substantial protein source. Which choice best meets that goal?
Avocado and mixed-leaf salad
Tomato pasta with grilled vegetables
Tofu and edamame stir-fry
Vegetable broth with rice noodles
10. What is one of protein's central roles in the human body?
Serving as the body's preferred fuel during ordinary activity
Building and repairing tissues and forming molecules such as enzymes
Acting as the main source of dietary fiber
Providing long-term energy storage in fat tissue
11. Why are legumes and grains often described as complementary protein foods?
Grains remove the carbohydrates naturally found in legumes
Their amino acid profiles can complement one another
Combining them makes all their protein digest instantly
Legumes allow grains to supply vitamin B12 naturally
12. Approximately how much energy does one gram of protein provide?
4 kilocalories
7 kilocalories
9 kilocalories
12 kilocalories
13. Based on typical nutrition values, which 100-gram serving usually contains the most protein?
Plain Greek yogurt
Cooked lentils
Cooked skinless chicken breast
Hard-boiled egg
14. What makes an amino acid “essential” in nutrition?
It is found only in animal-derived foods
It can be stored by the body for unlimited periods
The body cannot make enough of it, so it must come from food
It is used exclusively to build muscle tissue
15. Which typical serving generally provides the most protein?
Two large eggs
One cup of cottage cheese
One cup of dairy milk
Two tablespoons of peanut butter
16. A snack goal is at least 20 grams of protein. Which label calculation reaches the goal?
Two servings with 11 grams per serving
Three servings with 6 grams per serving
One and a half servings with 12 grams per serving
Four servings with 4 grams per serving