1. Why does glucose form a six-atom ring but fructose only a five-atom ring?
1. Why does glucose form a six-atom ring but fructose only a five-atom ring?
Homework Answers
Both fructose and glucose have six carbons but fructose is a keto-hexose (having ketone group at carbon 2nd) while glucose is aldo-hexose (aldehyde group at 1st Carbon).
Due to this keto group, the ring is formed between 2nd and 5th carbon joined by -O- , thus a 5 membered (4 carbons and 1 oxygen) ring is formed by fructose .
While glucose forms ring between 1st carbon and 5th carbon, joined by -O- , thus forms 6 membered ring (5carbons and 1 oxygen ) .
Thus glucose froms 6 member ring due to aldehyde group (aldo-hexose) while fructose forms 5 member ring due to ketone (keto-hexose).
Add Answer to:
1. Why does glucose form a six-atom ring but fructose only a
five-atom ring?
Which of the following statements correctly describe the properties of glucose and fructose? Choose one or...
Which of the following statements correctly describe the properties of glucose and fructose? Choose one or more: OA. Glucose is found in at least three common disaccharides found in nature, while fructose is a component of only one. B. Glucose and fructose are both hexose sugars. C. Glucose and fructose are both reducing sugars. D. Glucose can form furanose and pyranose ring structures, while fructose can o only form a furanose ring
Which of the following statements correctly describe the properties of glucose and fructose? * Choose one...
Which of the following statements correctly describe the properties of glucose and fructose? * Choose one or more: O A. Glucose can form furanose and pyranose ring structures, while fructose can only form a furanose ring. B. Glucose and fructose are both hexose sugars. O C. Glucose is found in at least three common disaccharides found in nature, while fructose is a component of only one. D. Glucose and fructose are both reducing sugars.
in the ring structure of fructose, there are ? carbon atom(s) and ? oxygen atom(s). The ring is a result of the formatio...
in the ring structure of fructose, there are ? carbon atom(s) and ? oxygen atom(s). The ring is a result of the formation of a hemiacetal where the hydroxyl group on carbon ? reacts with the ketone group on carbon ?.
This question is referring to a glucose ring structure How does ring closure affect structural variability?...
This question is referring to a glucose ring structure How does ring closure affect structural variability? That is, can the ring form of glucose have as many different structural shapes as the chain form of glucose? Is this 6-member glucose ring actually flat (planar)? Why/why not? Where is the carbonyl group in the glucose ring? Can you convert the ring to the chain without breaking bonds? How many carboxyl groups are in this molecule? How many dissociable groups? Could you...
1. Draw glucose B-D-glucose in a chair form, and circle the anomeric carbon. Why is the...
1. Draw glucose B-D-glucose in a chair form, and circle the anomeric carbon. Why is the anomeric carbon significant? 2. Why is cyclization of sugars important? What does the concept of mutarotation indicate to us about dual roles of monosaccharides? Two part question: 3. Why are monosaccharides most commonly found in pyran and furan ring forms, rather than: A) other ring motifs -(think along the lines of: why NOT 3,4, or 7 membered rings)? B) in their linear form? 4....
The predominant form of glucose in solution is a ring structure represented by the Haworth projection....
The predominant form of glucose in solution is a ring structure represented by the Haworth projection. Why then does glucose give a positive test and react completely in reactions which are characteristic of its straight chain form?
One difference between D-glucose and L-glucose is the open-chain form of L-glucose does not exist. it...
One difference between D-glucose and L-glucose is the open-chain form of L-glucose does not exist. it is not possible to make L-glucose. L-glucose has a 5-membered ring, and D-glucose has a 6-membered ring. O only D-glucose is found in disaccharides and polysaccharides. L-glucose cannot form a closed structure.
am MMM Page 8 27. A sugar with a six-sided ring attached to a five-sided ring...
am MMM Page 8 27. A sugar with a six-sided ring attached to a five-sided ring could be: a. ribose b. deoxyribose c. fructose d. glucose sucrose 28. 29 An acidic amino acid at the isoelectric point is in a solution of pH 7 b. in a solution of pH less than 7 c. at its lowest solubility d. at its highest solubility Upon hydrolysis the alcohols formed from the following compound are glycerol and CH-OC(CH2)CH=CH(CH)CH, CHỮO.C(CH, BCH, H.NCH,CH-0 0-CH...
Why are these reactions for gluconeogenesis exergonic? I get that Glucose 6-phosphate -> glucose and fructose...
Why are these reactions for gluconeogenesis
exergonic?
I get that Glucose 6-phosphate -> glucose and fructose
1,6-biphosphate -> fructose 6 phosphate release Pi, but doesn't
the formation of formation of oxaloacetate and phosphoenolpyruvate
require energy ( ATP and GTP)
ruvate. CH,OH CHOPO; HO он glucose 6- phosphatase HO OH OH 94 Он glucose 6-phosphate glucose glycolysao OPOH COCHZOPO HO O HO OH fructose 1,6- bisphosphatase ,POH COCH,OH HO он OH fructose 6-phosphate OH fructose 1,6-bisphosphate HCO; + ATP ADP +...
Draw the following monosaccharides in the chain form (not ring form): Write the chemical formula for...
Draw the following monosaccharides in the chain form (not ring form): Write the chemical formula for both glucose and fructose: What molecular similarities, in structure, are there between the glucose and fructose molecules? What are the differences? What are these two molecules called in relation to one another? , Draw the formation of a-glucose and a P-glucose starting from the chain form using your book (page 73) as a guide, (use chemical symbols) alpha-glucose beta-glucose In equation format, draw formation...
Which of the following statements correctly describe the properties of glucose and fructose? Choose one or more: OA. Glucose is found in at least three common disaccharides found in nature, while fructose is a component of only one. B. Glucose and fructose are both hexose sugars. C. Glucose and fructose are both reducing sugars. D. Glucose can form furanose and pyranose ring structures, while fructose can o only form a furanose ring
Which of the following statements correctly describe the properties of glucose and fructose? * Choose one or more: O A. Glucose can form furanose and pyranose ring structures, while fructose can only form a furanose ring. B. Glucose and fructose are both hexose sugars. O C. Glucose is found in at least three common disaccharides found in nature, while fructose is a component of only one. D. Glucose and fructose are both reducing sugars.
1. Draw glucose B-D-glucose in a chair form, and circle the anomeric carbon. Why is the anomeric carbon significant? 2. Why is cyclization of sugars important? What does the concept of mutarotation indicate to us about dual roles of monosaccharides? Two part question: 3. Why are monosaccharides most commonly found in pyran and furan ring forms, rather than: A) other ring motifs -(think along the lines of: why NOT 3,4, or 7 membered rings)? B) in their linear form? 4....
One difference between D-glucose and L-glucose is the open-chain form of L-glucose does not exist. it is not possible to make L-glucose. L-glucose has a 5-membered ring, and D-glucose has a 6-membered ring. O only D-glucose is found in disaccharides and polysaccharides. L-glucose cannot form a closed structure.
am MMM Page 8 27. A sugar with a six-sided ring attached to a five-sided ring could be: a. ribose b. deoxyribose c. fructose d. glucose sucrose 28. 29 An acidic amino acid at the isoelectric point is in a solution of pH 7 b. in a solution of pH less than 7 c. at its lowest solubility d. at its highest solubility Upon hydrolysis the alcohols formed from the following compound are glycerol and CH-OC(CH2)CH=CH(CH)CH, CHỮO.C(CH, BCH, H.NCH,CH-0 0-CH...
Why are these reactions for gluconeogenesis
exergonic?
I get that Glucose 6-phosphate -> glucose and fructose
1,6-biphosphate -> fructose 6 phosphate release Pi, but doesn't
the formation of formation of oxaloacetate and phosphoenolpyruvate
require energy ( ATP and GTP)
ruvate. CH,OH CHOPO; HO он glucose 6- phosphatase HO OH OH 94 Он glucose 6-phosphate glucose glycolysao OPOH COCHZOPO HO O HO OH fructose 1,6- bisphosphatase ,POH COCH,OH HO он OH fructose 6-phosphate OH fructose 1,6-bisphosphate HCO; + ATP ADP +...
Draw the following monosaccharides in the chain form (not ring form): Write the chemical formula for both glucose and fructose: What molecular similarities, in structure, are there between the glucose and fructose molecules? What are the differences? What are these two molecules called in relation to one another? , Draw the formation of a-glucose and a P-glucose starting from the chain form using your book (page 73) as a guide, (use chemical symbols) alpha-glucose beta-glucose In equation format, draw formation...
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