22 Questions
What is the combined effect of multiple factors on glycemic response?
Much lower than the individual effects
Why does overripe fruit have a higher GI/GL value than underripe fruit?
Because it is more easily digestible
How does cooking and processing affect the glycemic response of food?
It increases the GI/GL value
Why do individuals have different glycemic responses to the same food?
Due to genetic differences
How does the size of bites of food affect glycemic response?
Larger bites have a lower GI/GL value
What is the effect of eating carbohydrates with protein on glycemic response?
It decreases the glycemic response
What is the primary function of glucose-6-phosphate dehydrogenase (G6PD) in the presence of NADP+ or NAD+?
To form NADPH and 6-phosphogluconate
What is the main difference between simple and complex carbohydrates?
Simple carbohydrates are dietary monosaccharides or disaccharides, while complex carbohydrates are dietary polysaccharides
What is the primary concern in dietary considerations of carbohydrates?
How fast a given carbohydrate is broken down to generate glucose within the human body
What is the primary difference between glycemic index (GI) and glycemic load (GL)?
GI measures the quality of carbohydrates, while GL measures the quantity
What is the main limitation of using GI/GL values for weight management or disease prevention?
GI/GL values do not accurately predict the actual effects of high GI/GL foods
What is the primary reason why high GI/GL foods may not have the predicted effects?
High GI/GL foods are usually consumed in combination with low GI/GL foods
What percentage of energy is provided by simple carbohydrates in the diet?
20%
What is the primary difference between natural and refined sugars?
Natural sugars are found in whole foods, while refined sugars are separated from their plant source
What happens to yellow potassium ferricyanide when heated with an alkaline solution by reducing sugars?
It is reduced to colorless potassium ferrocynide
What is the role of trichloroacetic acid in the O-toluidine method?
To precipitate proteins
Which medium is required for the reaction between glucose and O-toluidine in the condensation method?
Hot acidic
Why is the o-toluidine method no longer used today?
O-toluidine is believed to be a carcinogen
What is directly proportional to the concentration of glucose in the ortho-toluidine method?
The intensity of the color measured photometrically at 630nm
What is the first step in the hexokinase method for plasma glucose estimation?
Serum or plasma is first deproteinized by barium hydroxide and zinc sulfate
Which statement is TRUE regarding the potassium zinc salt in the condensation method?
It is produced after the ferrocynide formation
In the hexokinase method, what is the role of the HK enzyme?
To help glucose react with adenosine triphosphate (ATP)
This quiz covers the factors that affect glycemic response, including the combined effect of different food components, the impact of protein and fats, and how the state and preparation of carbohydrate-containing foods influence glycemic response.
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