Glyceraldehyde does not have a cyclic form, but tetroses with only one additional carbon form rings...
Glyceraldehyde does not have a cyclic form, but tetroses with only one additional carbon form rings readily. Why might this be the case?
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Glyceraldehyde does not have a cyclic form, but tetroses with
only one additional carbon form rings...
2. Which of the following statements is true of cyclic forms of 6-carbon sugars? a. Conversion...
2. Which of the following statements is true of cyclic forms of 6-carbon sugars? a. Conversion of the linear form to the cyclic form results from a reaction between the 0 3 carbonyl C and an alcohol in the same molecule. b. Six-C sugars only form 6-membered rings c. The cyclic form has the same number of chiral centers as the linear form. d.xAt room temperature in aqueous solutions, glucose is primarily in the linear form Both a and b...
What determines peak intensity in IR spectroscopy? Why does carbon-carbon double bonds in aromatic rings have...
What determines peak intensity in IR spectroscopy? Why does carbon-carbon double bonds in aromatic rings have a strong peak absorption?
Additional Exercise 11.79 Why does carbon have a maximum of four covalent bonds? Carbon has valence...
Additional Exercise 11.79 Why does carbon have a maximum of four covalent bonds? Carbon has valence electrons; it needs electrons to form a noble gas electron structure. By sharing electrons, a carbon atom can form covalent bonds.
Briefly explain why methyl-beta-D-glucopyranoside does not give a positive Benedict’s test, but 4-O-methyl-beta-D-glucopyranoside (the cyclic form...
Briefly explain why methyl-beta-D-glucopyranoside does not give a positive Benedict’s test, but 4-O-methyl-beta-D-glucopyranoside (the cyclic form of glucose with a methyl group substituted for the H on the OH at carbon #4) does give a positive Benedict’s test.
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....
Glyceraldehyde-3-phosphate dehydrogenase catalyzes the phosphorylation of glyceraldehyde-3-phosphate, but unlike other glycolytic reactions, it does not require...
Glyceraldehyde-3-phosphate dehydrogenase catalyzes the phosphorylation of glyceraldehyde-3-phosphate, but unlike other glycolytic reactions, it does not require energy investment from ATP. This reaction occurs in two stages: oxidation/reduction and phosphorylation. Why is the oxidation/reduction reaction necessary to make phosphorylation favorable? Choose one: A. The oxidation/reduction reaction is necessary to oxidize phosphate, allowing addition to the substrate. B. The oxidation/reduction reaction is necessary to form an intermediate with a large free energy of hydrolysis. C. The oxidation/reduction reaction is necessary to produce...
Alkanes are hydrocarbons containing only single bonds. Acyclic alkanes have carbon atoms arranged in chains, whereas...
Alkanes are hydrocarbons containing only single bonds. Acyclic alkanes have carbon atoms arranged in chains, whereas cycloalkanes have carbon atoms arranged in one or more rings. How many hydrogen atoms are in an acyclic alkane with 7 carbon atoms? How many hydrogen atoms are in a cycloalkane with 7 carbon atoms?
5. Below, draw a ketoheptose of your choosing in its linear form, and then in the...
5. Below, draw a ketoheptose of your choosing in its linear form, and then in the corresponding cyclic form. Linear Cyclic 6. The end of a polysaccharide that has an anomeric carbon that is not bound to another saccharide is called the reducing end; the anomeric carbon can still open and close and also act as a reducing agent. How many reducing ends does a small amylopectin molecule with 100 branches have? Refer to the structure given in our notes...
Carbon can react with hydrogen to form several different compounds. Two compounds that contain only carbon...
Carbon can react with hydrogen to form several different compounds. Two compounds that contain only carbon and hydrogen are methane and ethylene. Select the statement that is an example of the law of multiple proportions. The mass ratio of carbon to hydrogen in methane is 3 : 1. The mass ratio of carbon to hydrogen in ethylene is 6: 1. Two different samples of methane have the same ratio of carbon to hydrogen. Two different samples of ethylene have the...
10) Why does Saturn have rings formed by small pieces of material instead of continuous solid...
10) Why does Saturn have rings formed by small pieces of material instead of continuous solid rings? a) b) c) d) The gravitational force of Saturn is very strong and non-uniform The gravitational force of Saturn is very strong and uniform The gravitational force of Saturn is very weak and uniform The gravitational force of Saturn is very weak and non-uniform
2. Which of the following statements is true of cyclic forms of 6-carbon sugars? a. Conversion of the linear form to the cyclic form results from a reaction between the 0 3 carbonyl C and an alcohol in the same molecule. b. Six-C sugars only form 6-membered rings c. The cyclic form has the same number of chiral centers as the linear form. d.xAt room temperature in aqueous solutions, glucose is primarily in the linear form Both a and b...
Additional Exercise 11.79 Why does carbon have a maximum of four covalent bonds? Carbon has valence electrons; it needs electrons to form a noble gas electron structure. By sharing electrons, a carbon atom can form covalent bonds.
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....
5. Below, draw a ketoheptose of your choosing in its linear form, and then in the corresponding cyclic form. Linear Cyclic 6. The end of a polysaccharide that has an anomeric carbon that is not bound to another saccharide is called the reducing end; the anomeric carbon can still open and close and also act as a reducing agent. How many reducing ends does a small amylopectin molecule with 100 branches have? Refer to the structure given in our notes...
Carbon can react with hydrogen to form several different compounds. Two compounds that contain only carbon and hydrogen are methane and ethylene. Select the statement that is an example of the law of multiple proportions. The mass ratio of carbon to hydrogen in methane is 3 : 1. The mass ratio of carbon to hydrogen in ethylene is 6: 1. Two different samples of methane have the same ratio of carbon to hydrogen. Two different samples of ethylene have the...
10) Why does Saturn have rings formed by small pieces of material instead of continuous solid rings? a) b) c) d) The gravitational force of Saturn is very strong and non-uniform The gravitational force of Saturn is very strong and uniform The gravitational force of Saturn is very weak and uniform The gravitational force of Saturn is very weak and non-uniform
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