9. Lactose, a sugar in milk, is composed of one glucose molecule joined by a glycosidic linkage to one galactose molecule. How is lactose classified? A) as a pentose B) as a hexose C) as a monosaccharide D) as a disaccharide E) as a polysaccharide 10. What bonds maintains the secondary structure of a protein? peptide bonds hydrogen bonds disulfide bonds ionic bonds phosphodiester bonds

9. Lactose, a sugar in milk, is composed of one glucose molecule joined by a glycosidic linkage to one galactose molecule. How is lactose classified? A) as a pentose B) as a hexose C) as a monosaccharide D) as a disaccharide E) as a polysaccharide 10. What bonds maintains the secondary structure of a protein? peptide bonds hydrogen bonds disulfide bonds ionic bonds phosphodiester bonds

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter3: Biological Macromolecules

Section: Chapter Questions

Problem 11RQ: Which of the following is not an extracellular matrix role of carbohydrates? protect an insect’s...

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Pls choose the best answer1. Which of the following is known as the blood sugar?A. MaltoseB. FructoseC. GlucoseD. Galactose 2. Sucrose is made ofA. two units of glucose linked by beta glycosidic bondB. two units of fructose linked by alpha glycosidic bondC. Glucose and fructoseD. two units of glucose linked by alpha glycosidic bond
solution shaking lilac purple solution 8. Distinguish between (a) Glycogen and cellulose (b) Amylopectin and amylose
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Choose the correct letter. Pls answer all. 1.A polysaccharide that is predominant in the plant cell wallA.GalactoseB. GlycogenC. SucroseD.Cellulose 2. A type of bond that links sugar unit in disaccharides and polysaccharidesa.Phosphatidic bondb.Peptide bondc.Glycosidic bondd.Ester bond
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1- Please refer to the Fisher representation of the 5 monosaccharides below: ÇH2OH CHO CHO CHO CHO H- H- он H- OH OH HO HO но- H- OH HO Но- H- -OH H- H- -OH HO- OH HO H- -OH H- -OH HO HO H- OH ČH2OH ČH2CH ČH2CH ČH2CH ČH2CH D-Fructose D-Glucose L-Glucose L-Idose D-Galactose 1a- Which one(s) of the above molecules belong(s) to the subcategory of aldohexoses? and which one(s) of these molecules belong(s) to the subcategory of ketohexoses? Briefly explain your response. 1b- Which one of the above molecules is an enantiomer of D-Glucose? and which one is an epimer of L-Ildose? Briefly explain your response.
For this I explained what it was but it wasn’t right so I have to explain why it’s wrong and get the right one for this and explain also how it’s right My answer: it’s a glycosidic bond because the bonds formed between two monosaccharides and it is typically formed between carbon - 1 of one monosaccharide and carbon -4 of the other. The condensation of water molecules is required for the formation of a glycosidic bond and either linkage the two monosaccharides units in disaccharide. This was a bad response for my homework because I had to identify the bond in this molecule and I tried saying it was glycosidic but I don’t know what else would be a correct one other than that so it’s been tricky.
rect Question 6. If the following oligosaccharide were treated with B-galactosidase, what would be the resulting products? OH OH HO- H OH HO- two disaccharides H two monosaccharides and one disaccharide four monosaccharides HO one monosaccharide and one trisaccharide No reaction would occur HO- но H OH H OH -OH G
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PLEASE HELP 1. How many chirality centers does ribose have? Identify them.