10. Which of the following is a reducing sugar? with explanation CH₂OH A B CH2OH CH3 OH OH بسمة CH2OH OH OH OH OH HO. C HOH2C OH HOH2C OH HO OH HO D CH₂OH OH OH E All the above
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- please give clear answersSuanswEred Which structure on the right represents the B-anomer of the monosaccharideshown below on the left? H. CHOH H-C-O HO- H--COH HO- HO A) HO. H-C-OH CHOH H C-OH HO- CH,OH B) INTomnaLS Page < 3 7. For each disaccharide, indicate whether the glycosidic linkage is a or ß. CH,OH CH,OH OH но OH OH ОН ОН CH2OH OH но OH CH 2 HO O OH OH OH Identify each Fischer projection as the D- or L-isomer.
- CI H2O d) (R) CH;CCH2CH2CH3 ČH2CH3 e) Br NaOH CH3 Ez10. Circle the reducing end of each of the disaccharides below. CH2OH CH2OH он о OH OH О ОН -О, ОН ОН OH O- -І OH -Т CH₂OH Н Н ОН I О Т- " CH2OH Н H -IO- OH ОН Н Н T OH(d) Draw the structure of the expected product when monosaccharide B undergo mutarotation upon dissolving in water in the presence of Tollens reagent (AGNO3, NHẠOH). он OH O. OH OH OH monosaccharide B
- Identify the products of the two reactions of glucose. COOH HOH Н НО H Н HOH Н- -OH CH₂OH Н НО CH2OH -OH H- H -Н -OH OH CH₂OH Cu2+/OH- CHO O НО н H OH H-+ -OH CH₂OH Н но- Н- Н- CHO HOH но- Н- -Н -ОН H-OH CHO CHO -ОН -Н -ОН -ОН CH2OH Answer Bank 0 CH3 H— НО -OH -H H-OH H-OH CH₂OH H₂/Pt CHO H-OH HO-H H -ОН H OH COOH CH₂OH =0 HO-H H- Н -ОН -OH CH₂OHAcetylation: tro S 요 :0: CH3CO₂H HH 11 OH H 12 HH CH3The structures of an aldose and a ketose are shown here. An aldose contains an aldehyde group. Click on that group.
- O ll 1) NaOEt 2) O `CH₂CH³ 3) H3O+2. The following diagram shows the straight-chain structure of an N-acetyl aminoheptose that is found in certain plants including avocado (Persea Americana). CHOH CH2OH CH,OH O: O: HO- но -HO- HO H но -HO- H- NHAC NHAC ACHN OH HN H- HO- HO CH2OH CHOH CH20H HO HO. Structure B Structure C Structure A OH OH CHOH CH2OH CH OH HO H HO H HO- H OH HO- HO H- -NHAC ACHN- ACHN HO- H OH HO ČHOH CH2OH CH2OH Structure D Structure E Structure F Which of the Fischer projections (A-F) matches the skeletal formula shown? Structure A Structure B Structure C Structure D Structure E O Structure F (1 mark) 王 HIrivatives: Nucleophilic Acyl Substitution Reactions - EOC O C-O [References] One step in the gluconeogenesis pathway for the biosynthesis of glucose is the partial reduction of 3-phosphoglycerate to give glyceraldehyde 3-phosphate. The process occurs by phosphorylation with ATP to give 1,3-bisphosphoglycerate, reaction with a thiol group on the enzyme to give an enzyme-bound thioester, and reduction with NADH. H-C-OH ATP ADP CH₂OPO32- 3-phosphoglycerate 0= OPO32- C H-C-OH CH₂OPO32 1,3-bisphosphoglycerate Enz-SH PO43- O= C S-Enz H-C-OH CH₂OPO3² (Enzyme-bound thioester) NADH/H+ O=C NAD*, Enz-SH H H-C-OH CH₂OPO3²- glyceraldehyde 3-phosphate Propose a structure for the first intermediate in the reaction of the enzyme-bound thioester with NADH to form glyceraldehyde 3-phosphate. To simplify the drawing process, substitute the structure below for the enzyme-bound thioester. S-CH3 substitute for the CH2CH3 enzyme-bound thioester You do not have to consider stereochemistry. • You do not have…