what is the cleland mechanism of type 1 aldolase using this diagram A B ↑ E AE AEB PEQ PE E

Q: What aldoses are formed when the following aldoses are subjected to the Kiliani-Fischer synthesis:…

A: a) D-threose = The aldose synthesised by Killiani-Fischer synthesis from the given aldose is, Here,…

Q: There are four d-aldopentoses (Table 25.1). If each is reduced with NaBH4, which yield optically…

A: The four aldopentoses are D-Ribose, D-Arabinose, D-Xylose and D-Lyxose. When these aldopentoses are…

Q: C. Trehalose and isomaltose are both dimers of glucose. However, they have considerably different…

A: #C:  Trehalose is formed by the 1→1 glycosidic bond between two α-glucose units.  Isomaltose is…

Q: A. NaOMe MEOH NaOMe MEOH Ester enolate NaOMe MEOH Mel enolate

A:

Q: 6. Draw an arrow pushing mechanism for the formation of the chemically labeled cells prepared via…

A: this is a staudinger reaction. Here ring pph2 attack the -N3 and form the ph3p=0 and -NH2, Then this…

Q: Which of the d-aldopentoses will give optically active aldaric acids on oxidation with HNO3 ?(

A: The D-aldopentoses which which give optically active aldaric acids on oxidation with HNO3 are D-…

Q: The a-dextro-glucopyranose can be converted to a- levo-glucopyranose by racemase. True False

A:

Q: H3C CH;CN H C-CI + LİSH D3C For the reaction above, which is the 2nd step of the mecha

A: The given reaction is an example of nucleophilic substitution reaction which will occur in two steps…

Q: Mark the TRUE option with respect to the following compounds: a) (I) is a disaccharide formed by…

A: a) can not be true because (I )is  diasachride formed from one aldose sugar and one ketose sugar. b)…

Q: Но HO- OH Но HO HO OH OH OH OH но This sugar is non-reducing

A: To answer this question, it is important to consider the structural aspect of the given molecule in…

Q: Question 31: Give the product of the aldol condensation in Figure 31. [Generate a SMILES notation:…

A: Aldol condensation is an base catalysed condensation between aldehyde or ketones. The product of the…

Q: A D-aldohexose A is formed from an aldopentose B by the Kiliani-Fischer synthesis. Reduction of A…

A: Step 1:First, draw an aldohexose skeleton and attach -OH group on the right hand side of stereogenic…

Q: When the product of an aldohexose and methanol in HCI is reacted with NaBH4, the product is. Select…

A: Organic reactions are those in which organic reactant react to form organic products.

Q: A D-aldohexose A is formed from an aldopentose B by the Kiliani–Fischer synthesis. Reduction of A…

A: Compound A is D-aldopentose. When treated with sodium borohydride, it is converted into alditol…

Q: 5. What are the relationships between the following aldoses: Enantiomers, Diasteromers, but not…

A:

Q: Draw the expected product of the reaction of the following sugars with excess methyliodide and…

A:

Q: Sugar X is known to be a d-aldohexose. On oxidation with HNO3, X gives an optically inactive aldaric…

A: The sugar X is D-galactose as it reacts with nitric acid to give an optically inactive structure due…

Q: Which D-aldopentose is oxidized to an optically active aldaric acid and undergoes the Wohl…

A: The structure of possible optically active aldaric acid from D-aldopentose are,

Q: Identify the structure of intermediate Cexpected from the following reaction sequence. NBS t-BUOK…

A:

Q: Draw the expected product of the reaction of the following sugars with excess methyliodide and…

A: The –OH group present in given sugar reacts with alkylating agents like CH3I and Ag2O and results in…

Q: (a) Which of the d-aldopentoses will give optically active aldaric acids on oxidation with HNO3 ?(b)…

A: (C) The sugar X is D-galactose as it reacts with nitric acid to give an optically inactive structure…

Q: Which of the following are reducing sugars? Comment on the common name sucrosefor table sugar.(a)…

A:

Q: Which aldoses are oxidized to optically inactive aldaric acids: (a) D-erythrose; (b) Dlyxose; (c)…

A: Given aldoses,    (a) D-erythrose    (b) D-lyxose    (c) D-galactose

Q: Regarding the following monosaccharides, indicate the CORRECT alternative: a) Only Gulosa, Idosa…

A: We are given 4 different monosaccharides out of which, 3 are aldoses and 1 is a ketose.

Q: Which aldohexoses could be obtained if D-erythrose undergoes 2 cycles of the Fischer-Killani Chain…

A: D- Erythrose undergoes 2 cycles of the Fischer Killani chain extension produces D-allose, D-altrose,…

Q: What aldoses are formed when the following aldoses are subjected to the Kiliani–Fischer synthesis:…

A: In Kiliani-Fisher synthesis is used to extend the chain of the aldose. In which addition of cyanide…

Q: Which of the compounds shown at the link below are both an aldose and a hexose? a) CHO b) CHO c) CHO…

A: All these are monosaccharides carbohydrates. In which aldose monosaccharides having aldehyde…

Q: Trehalose and maltose are both dimers of glucose. However, they have considereably different…

A: Consider a General Sugar   If a free OH group like in above sugar is present then the sugar willl…

Q: NABH, Ruff degradation an achiral alditol a D-aldohexose CHO CHO CHO CHO Но -H- H- -OH Но -- H- -OH…

A: H. 3 & 4

Q: Which of the following is a major product of the Hofmann degradation shown in the box? LN(CH3)2 CH3I…

A: The reaction proceeds by the Hofmann elimination reaction mechanism. In the Hofmann elimination (or…

Q: Model 2: Aldoses are reducing sugars. H. +~C=O H-C-OH I HO-C-H Ī H-C-OH H-C-OH CH₂OH oxidizing agent

A: Reducing Sugar (biology definition): A sugar that serves as a reducing agent due to its free…

Q: Mutarotation occurs when the two anomers interconvert in solution. Outline a stepwise mechanism for…

A: The change in optical rotation observed when glucose dissolved in water. This is due to…

Q: 5-Deoxyglucose will close to a? O a. thanose O b. furanose O c. maranose O d. none of the other…

A: Glucose is a sugar molecule. in deoxy-glucose, one of the OH is replaced by hydrogen. hence if it is…

Q: An unknown β-d-aldohexose has only one axial substituent. A Wohl degradation forms a compound which,…

A: Aldohexoses can form cyclic structure by fthe formation of bond between aldehydic carbon and…

Q: 1. Write synthetic schemes to show how you would transform D-glucose to each of the following…

A: Above compunds synthesized From glucose which is given below.

Q: 8. (a). In the box below draw out the structure of a-D-Glucopyranose-(12)-ß-D-Mannopyranose-…

A: Here we have to write the structure of given trisaccharide and to predict whether it is reducing…

Q: ehling's & Benedict's reagents, used to determine the presence of reducing sugars contain NiSO4…

A: The correct options are:

Q: Which D-aldopentoses are reduced to optically inactive alditols using NaBH4, CH3OH?

A: The possible optically inactive alditols with 5 C are as follows, These are inactive due to presence…

Q: When an aldose is treated with OA. the aldehyde B th

A: Monosaccharides are the simplest form of sugar. That are usually colouress, water soluble and…

Q: True or False ____________7] Salivary amylase can be use to hydrolyze 1,4 glycosidic  bonds of…

A: Given : We have to tell whether statement is true or false.

Q: Name the following aldoses. Include in the names the stereochemical designation D or L and, where…

A: To find the D/L configuration consider the chiral centre farthest to the CHO.  Left side OH…

Q: Which of the following is true for structure II? L-ketose D-ketose D-aldose L-aldose

A: The name of the structure depends on the the functional group present in the structure .  The prefix…

Q: Draw the two aldohexoses and one ketohexose that can be derived from the enol shown below. HC HO- C…

A: A monosaccharide compound containing six carbon atoms is called Hexose. Now, if Hexose contains…

Q: Which aldoses are oxidized to optically inactive aldaric acids: (a) D-erythrose; (b) D-lyxose; (c)…

A: All the aldehyde and alcohol groups on aldose are converted to the carboxylic group on oxidation…

Q: What products are obtained from the reduction of a. d-idose? b. d-sorbose?

A: The structure of D-idose is as: The reduction of D-idose gives

Q: Sugar alcohols (alditols) are formed by chemically reducing aldoses or ketoses. Which one of the…

A: Dear students, Benedict's test is used to check presence of reducing sugars. Sugars containing free…

Q: Carbohydrates classification.

A: "Since you have asked multiple questions, we will solve the first question for you. If you want any…