Question

please help!! switching to all online is so hard

50. When the following Fischer projection closes, which is the alpha Haworth form? CH2OH EO A 7 Но он se a cozycy A) a CH2OH a on B) HONE LOH HO CH₂ OH HO C2 C3°" cho CH2OH Lornoon E) Two of these are correct 51. What is the correct relationship between the 2 compounds? CH₂OH сом C=O 40 - OH HOH CH₂OH A) diastereomers B) epimers C) enantionmers and H0+ HCHON OR D) None of these CH2014 ÇH2014 TO Yoona LCH₂OH Jocha 52. How many of the following are glycosides? CROW Ho HOW A) 0 B) 1 C) 2 D 3 TOH E 4 OH OH 53. When the following Fischer projection closes, which is the beta Haworth form? HOM OOR CH2OH OH ca oh B) но и он E) Two of these are correct OH D) HOO OH OH

Answer 1

50) HO. HO HOV он Rotate HO- FO Rotate HOH - HOH HOFH H HO+H - HOTH (HOTH SKOH HO. → HO OH на нонн VOH OH a-L-Psicofuranose down on the on the ring ring HO up As we can see in above conversion of the Fischer projection to Haworth projection matching structure is B). Hence answer is option A). 51) The given two compounds are not mirror images of each other and hence diastereomers. Answer is option A). 52) Glycosides are compounds in which the other functional groups are attached to anomeric carbon by glycosidic linkage. Thus structure-1, 3, and 4 are glycosides where in all these structures anomaric carbon is attached to methoxy group via glycosidic linkage. hence answer is option D) 3.

HO LOOH H- OH HOH Rotate I i It HoHk H KH H-OHHH H OH OH HOVO The answer is option C). updown on the on the ring ring OH L-Ribose OH 43) Amylopectin: It contains a(14) glycosidic bonds as well as a( 16) glycosidic bonds a(146) glycosidic Thus answer is option c) a(14) and a(16) OH HO HON a( 1 4) glycosidic

44) Chitin: It contains only B-(1-4)-linkage Thus answer is option b) B-(1-4) ΝΗ CH3 a) OR 45) D-glucose: a 46) A beta monosaccharide: a AP b) RIOR OCH, OCH 47) A glycoside: b c) HOCH, 48) Open-chain form is an aldopentose: c OH CH d) HOCH 49) Open-chain form is Ketohexose: d