Title: Experiment 2 Quiz
Course: Food Analysis Labs > Section: Course Content

Q: Which of the following is a major reason carbohydrates are important in foods?
- As a major source of energy to fuel your body.
- As a major source of amino acids to build your muscles.
- To provide minerals for your body.
- None of the above.
A: As a major source of energy to fuel your body.

Q: Which of the following is another reason that carbohydrates are an important part of foods?
- Because calcium is important for your bones.
- As dietary fiber, which influences physiological processes that are increasingly understood to be important to human health.
- To impart color to foods.
- They are not an important part of foods.
A: As dietary fiber, which influences physiological processes that are increasingly understood to be important to human health.

Q: Which of the following answers lists the three major kinds of carbohydrates found in foods?
- Monosaccharides, Polysaccharides, and saccharin.
- Monosaccharides, Jellysaccharides, and dietary fiber.
- Oligosaccharides, Polymers, and Cholesterol.
- Monosaccharides, Polysaccharides, and dietary fiber.
A: Monosaccharides, Polysaccharides, and dietary fiber.

Q: Which of the following is true of qualitative analysis?
- It is the identification of the constituents,e.g., ingredients, present in a substance.
- It is a measure of the quantity, or amounts, of particular constituents present in a substance.
- It answers the question of how much of each thing is present in this food.
- It ensures that the added components are listed in the right order on the ingredients label.
A: It is the identification of the constituents,e.g., ingredients, present in a substance.

Q: Which of the following is not a commonly used method of analysis for carbohydrates?
- Phenol-Sulfuric Acid method for total carbohydrate.
- Determination of sugars by HPLC.
- Gravimetric determination of total fiber.
- Tasting how sweet it is.
A: Tasting how sweet it is.

Q: Why are some common methods of carbohydrate analysis not yet approved by the AOAC?
- Some of them are newer, and approval has not yet caught up.
- Some of them actually are approved, such as the commonly used Phenol-Sulfuric acid determination of sugars.
- Answer A and B are both true.
- None of the above.
A: Answer A and B are both true.

Q: You've just been assigned to analyze a food sample for dietary fiber. Your company was just created yesterday, and you are the resident expert, and must select a method.

Which of the following factors do you consider?
- The fact that you are analyzing for dietary fiber, and need to find a method specific for that component.
- The possible interferences that could affect your chosen method, such as resistant starch that must be removed prior to gravimetric analysis.
- The goal of your measurement, since you might want a quick, simple test for a routine quality measurement, or a highly specific and accurate method for nutritional labeling.
- All of the above.
A: All of the above.

Q: Other than your Nielsen text and lab manual, which of the following can be a good place to look for approved methods to analyze for carbohydrates, if you have a subscription available?
- AOAC International publication 'Official methods of analysis'.
- Google.
- The US Department of Labor website.
- All of the above.
A: AOAC International publication 'Official methods of analysis'.

Q: Which of the following are interferences that could affect my Phenol-Sulfuric Acid measurement of my favorite soft drink?
- The color, because we are measuring UV absorbance at 490 nm,
- The cloudiness of my soft drink, because we are measuring UV absorbance at 490 nm.
- The presence of bubbles in my soft drink, because we are measuring UV absorbance at 490 nm.
- All of the above.
A: All of the above.

Q: Carbohydrates are the major source of calories in soft drinks, beer, and fruit juices.
- True
- False
A: True