2. Circle the carbon atoms of the carbohydrate rings of these sugars at which theoxidation takes place. These carbon atoms will become part of an aldehyde or ketonegroup.Note: do this for the reducing sugars only!OHHOHHHноно.HOно-но--HHноHноHHO,HноB-D-glucoseонHO.HOHHỌНоsucroseOHHHНоOCH3OHmethyl a-D-glucosideНо.Hно.НоOHНо-HO-ноOHOHmaltosea-D-fructose

If a sugar(Monosaccharide, Disaccharide or Polysaccharide) can cause reduction of other compounds…

Answered: 2. Circle the carbon atoms of the…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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1. Below are two isomers of mannose. Classify this sugar based on sugar number. Is this sugar an aldose or a ketose? Indicate which sugar is in the D conformation and which is in the L confirmation. Are these sugars enantiomers or diastereomers? H но-н НО- -Н Н- -ОН Н -ОН CH2OH Н- ІІ НО НО I OH -ОН Н– -Н CH₂OH =1
13. Observe the diagrams below. Which sugar(s) is(are) epimers of xylose? Specify the carbon that is involved. HICIOH HIC-OH HIC-OH CH₂OH D-Ribose Figure 7-3 part 2 2013 of chemistry Seth Edition Five carbons HO-C-H D-Aldoses H- -OH H -C-OH -OH CH₂OH CH₂OH D-Arabinose D-Xylose H-C-OH HO-C-H H-C-OH H-C-OH 0 H-C-OH HOICIH CH₂OH D-Glucose H но- C-H HO -H H -C-OH CH₂OH D-Lyxose 14. Observe the structures below and determine: H HIC-OH CHO HOH HO-C-H HO-C-H OH- a. Which is an epimer of glucose: galactose or fructose? b. Which is a ketose of glucose? H-C-OH CH₂OH D-Galactose H н——он HOH CH₂OH D-glucose CHO он———н H- он——н он——н CH₂OH L-glucose CH₂OH C=0 HO-C-H H - C_OH -OH H-C-OH CH₂OH D-Fructose
Identify whether each monosaccharide is an aldose or a ketose. Н НО Н Н НО- CHO ОН H -ОН ОН CH2OH CH2OH H CH₂OH Н НО Н CHO ОН CHO H -ОН CH₂OH н-с ОН CH2OH Н Н Н Н· CH2OH C=0 ОН CH2OH ... CHO ОН ОН ОН CH2OH Но Н Н Н CH2OH c=0 -Н -ОН CH2OH CH2OH О ОН ОН CH2OH
CH2OH но но- HO - ČH2OH CH2OH H- HO- но- H- O- ČH2OH
10. Write the reaction for the reduction of D-Galactose. What type of carbohydrate is formed by this reduction? CHO H oH HO H H oH CH,OH D-Galactose 11. Write the reaction for the complete oxidation of D-Xylulose. What type of carbohydrate is formed by this oxidation? CH,OH HO H H- OH CH,OH D-Xylulose
Consider the following carbohydrates: CHO CH2OH но H. OH OH H. OH CH,OH HO HH HO OH OH OH CH-OH CH,OH %3D II Which of these are D-sugars? O All are D-sugars I and II I and IlI Il and III All are L-sugars エ
2. Name the disaccharide (shown at right) formed by glycosidic linkage of D-Glucose and D-Fructose. ● Name this disaccharide: Do you expect this disaccharide to be a reducing sugar? Briefly explain. OH HOCH₂ H CH₂OH I H OH H H HO OH H H O OH H CH₂OH
Which of the following statements is correct regarding the structures below? CHO CHO H-OH ОН н ОН НО H НО -Н н- ОН CH₂OH CAB All are structures of D-sugars. All are structures of ketohexoses. Only CAR is a monosaccharide. 0 Only CAP is a L-sugar. Н I H CHO -ОН H-OH H-OH н- -ОН CH₂OH CAR H-OH -ОН НО-Н то н- H-OH CH₂OH CAP CH2OH to HO-H НО-н Н 1 - он CH₂OH CAT
X. Glycosidic linkage in carbohydrates are form as a result of hydrolysis Y. On the other hand, peptide bonds in proteins are form as a result of dehydration. Select one Only the first statement is TRUE Only the second statement is TRUE Both statements are FALSE Both statements are TRUE
Shown here is a monosachharide. How many total forms of this sugar are there? 1 CHO H-2 он н-3 он на I I H4OH + 0 0 0 0 8 2 5CH₂OH 16
16. Fatty acid synthesis is carried out by fatty acid synthase, a single polypeptide that has multiple activities. The steps for fatty acid synthesis are given below. Number them in the order in which they occur. _The ketobutyryl group is dehydrated. The acetyl group from the acetyl CoA is transferred to the malonyl group on the acyl carrier protein to form a ketobutyryl acyl carrier protein. The acetyl group from the acetyl CoA is reduced by NADPH. _The butenoyl is reduced. The butyrl group is transferred to the site where the initial acetyl group from acetyl-CoA An acetyl group from acetyl-CoA is transferred to the acyl carrier protein. once was. The acyl carrier protein transfers an acetyl group to another site on the fatty acid synthase. Malonyl-CoA is decarboxylated. The acyl carrier protein reacts with malonyl- CoA to pick up its malonyl group.
* Which of the following statements regarding the reaction of monosaccharide is INCORRECT? Oxidation of sugars using enzymes produces aldaric or dicarboxylic acidic sugar Reduction of the carbonyl group of aldoses and ketoses produces sugar alcohol In acidic solutions, the hydroxyl group of hemiacetals reacts with alcohol to form acetals for glycosides Amino sugars are formed out from the replacement of one of the hydroxyl groups of monosaccharide None of the given options

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