Carbohydrates (Part 3 of 4) - Disaccharides and Polysaccharides
30.7 هزار بار بازدید -
11 سال پیش
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In this video, I depict and describe some key disaccharides and polysaccharides that any and every biochemistry student should be familiar with.
Maltose is a disaccharide with two glucose molecules connected by an alpha-1,4-glycosidic bond. Maltose is a reducing sugar because it has a free anomeric OH group.
Lactose is a disaccharide with a galactose and a glucose connected by a beta-1,4-glycosidic bond. Lactose is a reducing sugar because it has a free anomeric OH group.
Sucrose is a disaccharide with a glucose and a fructose connected by an alpha,beta-1,2-glycosidic bond. Sucrose is not a reducing sugar because it does not have a free anomeric OH group.
Cellulose is a polysaccharide with a bunch of glucose molecules connected by beta-1,4-linkages.
Starch and glycogen are both polysaccharides with a bunch of glucose molecules connected by alpha-1,4-linkages. Glycogen is more highly branched.
Humans have the enzyme to digest alpha-1,4-linkages, not beta-1,4-linkages. That’s why we can digest starch and glycogen, but not cellulose.
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For Related Practice Problems with Worked Video Solutions on Carbohydrates, visit courses.moofuniversity.com.
In this video, I depict and describe some key disaccharides and polysaccharides that any and every biochemistry student should be familiar with.
Maltose is a disaccharide with two glucose molecules connected by an alpha-1,4-glycosidic bond. Maltose is a reducing sugar because it has a free anomeric OH group.
Lactose is a disaccharide with a galactose and a glucose connected by a beta-1,4-glycosidic bond. Lactose is a reducing sugar because it has a free anomeric OH group.
Sucrose is a disaccharide with a glucose and a fructose connected by an alpha,beta-1,2-glycosidic bond. Sucrose is not a reducing sugar because it does not have a free anomeric OH group.
Cellulose is a polysaccharide with a bunch of glucose molecules connected by beta-1,4-linkages.
Starch and glycogen are both polysaccharides with a bunch of glucose molecules connected by alpha-1,4-linkages. Glycogen is more highly branched.
Humans have the enzyme to digest alpha-1,4-linkages, not beta-1,4-linkages. That’s why we can digest starch and glycogen, but not cellulose.
For a suggested viewing order of the videos, information on tutoring, personalized video solutions, and an opportunity to support Moof University financially, visit MoofUniversity.com, and follow Moof University on the different social media platforms.
Don't forget to LIKE, COMMENT, and SUBSCRIBE:
http://www.youtube.com/subscription_c...
SUPPORT MOOF UNIVERSITY:
http://www.moofuniversity.com/support...
BUY A T-SHIRT
https://shop.spreadshirt.com/moofuniv...
INFORMATION ABOUT TUTORING AND PERSONALIZED VIDEO SOLUTIONS:
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FACEBOOK:
Facebook: 1554858934727545
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11 سال پیش
در تاریخ 1392/07/17 منتشر شده
است.
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