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- 9. Lactose exists in two anomeric forms, Draw both anomeric forms of lactose. Why no anomeric forms of sucrose have been reported?Which of the following is the B-anomer of D-galactose? CHO H-C-OH HO-C-H но-с—Н Н-С—ОН CH2OH CH,OH OH -O, OH OH CH,OH OH он он CH2OH O. OH OH OH OH CH2OH O OH OH OH pone of theseWhich of the following is an anomer of a-D-galactopyranose? CH,OH он он он H он ÇH,OH OH он H он H он ÇH,OH он H. H OH он ÇH,OH OH он он он HHI
- 13. One or more of the compounds shown below will satisfy each of the following statements. Not all compounds may be used; some may be used twice. Put the letter(s) in the blank. (a) Found in chitin. (b) An L-saccharide. (c) The first residue attached to asparagine in N-linked glycans. (d) A uronic acid. (e) A ketose. CH,OH COO CO- H OH H OH ОН Н но OH OH H H но OH Но - CH3 óso, NHC- OH (a) (b) (c) CH,OH CH,OH CH,OH c=0 CHOH C=0 H-C-OH CH,OH но-с—н ČH,OH CH,OH (d) (e) (f) 우Is the sugar in the nucleotide deoxytibose or ribose? How do you know?Lactose exists in two anomeric forms, but no anomeric forms ofsucrose have been reported. Why?
- b-Galactosidase is an enzyme that hydrolyses only b(1,4)linkages of lactose. An unknown trisaccharide is convertedby b-galactosidase into maltose and galactose. Draw thestructure of the trisaccharidewhat is the difference between glucosidic linkage and glycosidic lingakeАCTIVTY 6.2.7 Describe the common structural features and differences for each pair 1. Cellulose and glycogen 2. D-glucose and D-fructose 3. Maltose and Sucrose 4. Chitin and Amylopectin