MBB 321 Lecture Notes - Lecture 6: Glycogen, Amylase, Enzyme

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burgundyferret646

30 Oct 2015

School

Simon Fraser University

Department

Molec Biol & Biochem

Course

MBB 321

Professor

Ingrid Northwood

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Document Summary

Disaccharides: two monosaccharides joined together by an o-glycosidic bond. The anomeric carbon (carbon 1) of one monosaccharide reacts with the hydroxyl group (carbon 4) on another. Disaccharides are distinguished by the structure and order of there component monosaccharides. The configuration of the anomeric carbon determines the configuration of the disaccharide. / [3 letter code of monosaccharide] (1 4)[3letter code of second monosaccharide] There are three types of disaccharides: maltose: (diastase) of starch. Molecules becomes a beta ( ) glycosidic bond it produces cellubiose. This difference has a significant impact on the shape of the molecule which makes theses bonds accessible to specific proteins. Maltose and cellubiose are both dimers of glucose, however require different enzymes to catalyze there. General formula: glc( 1 4) glc: lactose, sucrose: The principle carbohydrate in milk and is hydrolyzed by lactase (humans) and. Lactose is comprised up of a galactose. Molecule bonded to a glucose molecules by a beta ( ) glycosidic bond.

Related Questions

1) What is the difference between maltose and amylose (starch)?
Select one:
a. Maltose is joined by 1-4 glycosidic linkages, while amylose is joined by 1-6 glycosidic linkages.
b. Maltose is made of glucose in the alpha form, while amylose is made of glucose in the beta form.
c. Maltose is composed of glucose monomers, while amylose is composed of fructose monomers.
d. Maltose is a disaccharide, while amylose is a polysaccharide.
2) What does the â1-4â in â1-4 glycosidic linkageâ mean?
Select one:
a. Each branch of the chain is followed by four monosaccharides.
b. A one-carbon monosaccharide is connected to a four-carbon monosaccharide.
c. The first carbon on one monosaccharide is connected to the fourth carbon on the next monosaccharide.
d. Each monosaccharide is connected to four other monosaccharides.

What is the difference between the sugar group in DNA and the sugar group in RNA?

Select one:

a. The sugar group in DNA is a hexose, while the sugar group in RNA is a pentose.

b. The sugar group in DNA has one less hydroxyl group (âOH) than the sugar group in RNA.

c. The sugar group in DNA is a purine, while the sugar group in RNA is a pyrimidine.

d. The sugar group in DNA contains one less carbonyl group (double-bonded oxygen atom) than the sugar group in RNA.

peachbeetle893

Proteins are composed of which of these monomers?

a) amino acids

b) glucose

c) fatty acids

d) nucleotides

e) glycerol

The source of glucose in our diet is

A Starch

B Sucrose, and other disaccharides

C Lactose

D Glucose and other monosaccharides

E all of the above

Which one of the following carbohydrates is a ketose sugar?

A. Galactose

B. Fructose

C. Glucose

D. Mannose

E. Glyceraldehyde

Animals cannot metabolize cellulose for which of the following reasons?

A.. Cellulose is insoluble.

B. They do not commonly consume cellulose.

C. They do not have an enzyme to hydrolyze the beta-1,4-glycosidic bonds (linkages).

D. They do not have an enzyme to hydrolyze the branches.

In amylopectin, the glucose molecules are connected by

A. beta-1,4-glycosidic bonds

B. alpha-1,6-glycosidic bonds

C. alpha-1,4-glycosidic bonds

D. alpha-1,4-glycosidic bonds and alpha-1,6-glycosidic bonds

Which of these statements about galactose is FALSE?

Galactose

A. is an aldohexose that occurs in the free form in nature.

B. is obtained as a hydrolysis product of the disaccharide lactose, a sugar found in milk and milk products.

C is important in the cellular membranes of the brain and nervous system.

D. differs from D-glucose only in the arrangement of the OH group on carbon 4.

E) none of the above are false

MBB 321 Lecture Notes - Lecture 6: Glycogen, Amylase, Enzyme

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