Carbohydrates Flashcards
How are carbohydrates classified?
Carbohydrates are classified by their degree of polymerisation into sugars.
What is the DRV for sugars?
The DRV for sugars is <5% of dietary energy.
Where are monosaccharides typically digested?
Monosaccharides are typically digested in the small intestine.
Where are oligosaccharides typically digested?
Oligosaccharides are typically digested in the large intestine.
In lactose intolerant individuals, where is lactose digested?
In lactose intolerant individuals, lactose goes to the large intestine.
What are glycaemic carbohydrates?
Glycaemic carbohydrates are carbohydrates that are digested to sugars and absorbed in the small intestine. They can raise blood glucose concentration.
Which enzyme (salivary and pancreatic) primarily digests starch and glycogen?
Starch and glycogen are primarily digested by a-amylase (salivary and pancreatic)
Which bonds does amylase work on?
Amylase works on the a1-4 bonds of starch and glycogen.
Does a-amylase work on a1-6 bond?
No a-amylase does not work on a1-6 bonds.
What is the name of the indigestible substance due to the a 1-6 glycosidic bonds?
The indigestible substance due to a1-6 bonds is called the limit dextrin.
What are the products of starch and glycogen digestion by a-amylase?
The products of starch and glycogen digestion by a-amylase are maltose and maltotriose
Which enzyme cleaves maltose, maltotriose & other a 1-4 linked oligosaccharides which were not digested by a-amylase?
Maltase ( a-glucosidase) cleaves maltose, maltotriose & other a 1-4 linked oligosaccharides which were not digested by a-amylase.
