BIOMOLECULES AND ENZYMES

BIOLOGY

CLASSIFICATION OF CARBOHYDRATES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What common sugar do lactose, maltose, corn syrup and high fructose corn syrup all share?
A
sucrose
B
glucose
C
fructose
D
none of the above
Explanation: 

Detailed explanation-1: -Starch itself is a chain of glucose (a simple sugar) molecules joined together. When corn starch is broken down into individual glucose molecules, the end product is corn syrup, which is essentially 100% glucose.

Detailed explanation-2: -Lactose is a sugar found in milk. It is a disaccharide made up of glucose and galactose units. It is broken down into the two parts by an enzyme called lactase. Once broken down, the simple sugars can be absorbed into the bloodstream.

Detailed explanation-3: -No. High-fructose corn syrup is corn syrup that has been further treated with enzymes to break down some of the glucose into another common sugar, fructose. Fructose “is the sweetest of the common sugars, ” McGee says, which makes high-fructose sweeter than regular corn syrup.

Detailed explanation-4: -In turn, when the fructose content exceeds 50%, the name changes to Fructose-Glucose Syrup to reflect the higher content of fructose. In the United States, the syrup is produced from a maize starch, usually with either 42% or 55% fructose content, hence it is called High Fructose Corn Syrup.

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