BIOL1001 Lecture Notes - Lecture 14: Blood Sugar, Glycogenolysis, Dehydration Reaction

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carminedeer281

9 Aug 2016

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Document Summary

Maltose, or malt sugar, is a disaccharide formed by a dehydration reaction between two glucose molecules. The most common disaccharide is sucrose, or table sugar, which is composed of the monomers glucose and fructose. A long chain of monosaccharides linked by glycosidic bonds is known as a polysaccharide. The chain may be branched or unbranched, and it may contain different types of monosaccharides. Starch, glycogen, cellulose, and chitin are primary examples of polysaccharides. Plants are able to synthesize glucose, and the excess glucose is stored as starch in different plant parts, including roots and seeds. Starch is the stored form of sugars in plants and is made up of glucose monomers that are joined by 1-4 or 1-6 glycosidic bonds. The starch in the seeds provides food for the embryo as it germinates while the starch that is consumed by humans is broken down by enzymes into smaller molecules, such as maltose and glucose.

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

Can somebody check if my answer is rght? Thank you

Complex carbohydrates

Indicate whether each of the following statements about polysaccharides is True or False.

1. Polysaccharides are long polymers made of many nucleotides that have been joined through dehydration synthesis. False
2. Cellulose is the main storage polysaccharide in plants while glycogen is an important storage polysaccharide in many animals. False
3. Both starch and glycogen are composed of Î±-glucose subunits. True
4. Starch is composed of amylose and amylopectin, which are unbranched and branched chains of Î±-glucose subunits, respectively. False
5. Like amylopectin, glycogen is insoluble in water, but it has a longer average chain length and fewer branches. True
6. Although some polysaccharides are used to store energy, others serve as structural material for cells. True
7. The principal structural polysaccharide in plants is starch. True
8. Cellulose is composed of a long, branched chain of Î²-glucose subunits. True
9. The starch-hydrolyzing enzymes produced by most organisms cannot break the bond between two Î± -glucose subunits because they only recognize Î² linkages. False
10. Chitin is a structural polysaccharide found in the exoskeleton of arthropods and the cell wall of many fungi. True

please i need help with this qustions answer the multiple choice that is all and be clear not writes un clear stuff just asnswer the qustions please

Question 1

Starch is: (select all the correct answers)

an energy storage carbohydrate in plants

an energy storage carbohydrate in animals

a structural carbohydrate in plants

a polymer of glucose

Question 2

The monomers in starch are joined together by which type of linkage?

beta 1-4 glycosidic linkage

alpha 1-4 glycosidic linkage

alpha 1-6 glycosidic linkage

Question 3