20. Which of the following is a polysaccharide with B-1,4 glycosidic linkages? C. glycogen E. None of the above A. cellulose B. lactose D. sucrose
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- 1. Explain why sucrose is non reducing sugar?2. Draw the structure and give the systematic name of the given disaccharides. (a) Lactose which is also known as milk sugar: β-D-Gal(1--> 4)β-D-Glc, where Gal is galactose and Glc is glucose. (b) Sucrose which is also known as table sugar: β -D-Glc (1-->2) β-D-Fru where Glc is glucose and Fru is fructose.1. In two sentences or less describe the common structural features and the differences foreach of the following pairs: cellulose and glycogen D-glucose and D-fructose maltose and sucrose acetal and hemiacetal ester and glycosidic bonds
- 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 bond1. Is the disaccharide reducing? Yes or no and why. 2. Will the disachharide react positively with benedicts reagent? Yes or No. 3. What is the specific glycosidic linkage of the disacchride? A. alpha-1,4 glycosidic linkage B. beta-1,3 glycosidic linkage C. alpha-1,3 glycosidic linkage D. beta-1,4 glycosidic linkage1. Discuss the difference between an ⍺-D-glucose and a β-D-glucose. How can the structure of a monosaccharide affect its bioactivity?
- 1.One of the main sources of sphingosine in the body is in the cell membrane. What complication could arise from the biological synthesis of ceramide?G. Why does the viscosity of the lysate change after the addition of DNAse and sonication?a-Give brief information about glycogen, starch and celluiose. Glycogen: Starch: Cellulose: b-What are the main differences and similarities of these polysaccharides?
- 6. Which class or reactions results in the degradation of all macromolecules: a) dehydration synthesis of monomersà polymers with the loss of an H2O with the addition of each monomer b) hydrolysis with the addition of one H2O for each reaction c) oxidation with the loss of an e- d) reduction with the gain of an e-An example of a monosaccharide is fructose glucose galactose all of the aboveMaltose, sucrose, and lactose differ from one another: a. because not all contain glucose. b. because not all of them exist in ring form. c. in the number of carbons in the sugar. d. in the number of hexose monomers involved. e. by the linkage of the monomers.