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QUESTION 19 For which one of the structures A, B, C or D given below will...
please help 4. For each pair of structures below circle the most relatively stable one. Show...
please help
4. For each pair of structures below circle the most relatively stable one. Show work by drawing relevant chair structures and/or Newman projections as needed) to clearly illustrate why. It is best practice here that only the most stable conformations for each compound are being compared in each set. For clarity. provide a few words that explain your analysis when comparing the illustrations. (12pts total for this problem) (a) ♡ va ♡ 5. (a) (3pts) Look up trans-decalin...
5. (a) (3pts) Look up trans-decalin and cis-decalin in your text book. Which of these is...
5. (a) (3pts) Look up trans-decalin and cis-decalin in your text book. Which of these is not able to undergo a chair-flip? Briefly explain. с The tetracyclic structure (shown below) is comprised of rings A,B,C, and D and it represent a typical steroid skeleton along with the numbering scheme used for this class of compounds. The methyl (Me) groups and hydrogens (H) atoms shown are at the bridgehead positions and stereochemistry has been shown for clarity. 112 Me D (b)...
Question 1: Compare the possible ring structures and conformers for fructose and decide which is preferred...
Question 1: Compare the possible ring
structures and conformers for fructose and decide which is
preferred (if any). There are four main hemi-ketal rings, one of
which is shown below. What factors might influence the preference
for 5- or 6-membered rings?
Question 2: Make a model of vitamin C. Note the
lactone link that forms the ring, rather than the hemi-ketal that
is present in fructose. Do you think the presence of sp2
carbons in the ring induce strain? Does...
Question 3 Homework. Unanswered The compounds represented by the structures below are: CH3 CH3 and O...
Question 3 Homework. Unanswered The compounds represented by the structures below are: CH3 CH3 and O A constitutional isomers o B identical o C cis/trans isomers o D conformers O E different compounds (not isomers)
Tor F 1. With the exception of steroids, all lipids contain at least one fatty acid. 2. Some lipids contain monosaccharides as part of their structure. 3. Some lipids contain an amino acid as part of...
Tor F 1. With the exception of steroids, all lipids contain at least one fatty acid. 2. Some lipids contain monosaccharides as part of their structure. 3. Some lipids contain an amino acid as part of their structure. 4. Glycerophospholipids contain a phosphate portion in their structure. 5. All lipids have a molecule of glycerin as their backbone. 6. Polyunsaturated fatty acids have more than one C-C double bond in their "backbone." 7. Fatty acids are soluble in water. 8....
Q1.The structures below are: (2pts) A) Enantiomers B) Cis-trans isomers C) Structural isomers D) Both A...
Q1.The structures below are: (2pts) A) Enantiomers B) Cis-trans isomers C) Structural isomers D) Both A and B
19. The degree of membrane fluidity depends on . the percentage of lipids that contain choline b. the percentage of glycolipids c. the percentage of faty acids d the percentage of unsaturated far...
19. The degree of membrane fluidity depends on . the percentage of lipids that contain choline b. the percentage of glycolipids c. the percentage of faty acids d the percentage of unsaturated farty acids Membeane proteins can be located a. entirely within the membrane b on the surface of the membeane c. in either position d. the position cannot be determined 20. 21. Which property has not been observed for membrane proseins? a energy storage b. transport of substances into...
1. a. Draw the structures of A and B (resonance structures), and C (tetrahedral intermediate). Us...
Please help!!
1. a. Draw the structures of A and B (resonance structures), and C (tetrahedral intermediate). Use curved arrows to show how each structure is formed b. Draw the structure of the Nu: you would use to make CompoundD O (tetrahedral intermediate) он c. (i) Explain why H does not react with a pi bond in the ring in Compound Z. (ii) Which resonance structure, A or B, shows why reacting H with the ketone makes the more reactive?...
select the appropriate structures for A B C and D Brz HNO3 حواء H₂ •Pd/c H₂SO4...
select the appropriate structures for A B C and D
Brz HNO3 حواء H₂ •Pd/c H₂SO4 Alcz B с A. B C Structure Bank NO2 CI СІ NO2 В 'N NO2 NO2 CI NHL NH ci NO 1 2 3 4 5 7 8
21. Which property has not been observed for membrane proteins? a. energy storage b. transport of...
21. Which property has not been observed for membrane proteins? a. energy storage b. transport of substances into and out of the cell catalysis (enzymatic activity) acting as a receptor c. d. 22. In the fluid mosaic model of membrane structure the proteins are specifically bonded to the lipids b. a. the proteins "float" in the lipid bilayer the proteins are sandwiched between the lipid molecules c. d. the lipids are sandwiched between the protein molecules 23. All steroids contain...
please help
4. For each pair of structures below circle the most relatively stable one. Show work by drawing relevant chair structures and/or Newman projections as needed) to clearly illustrate why. It is best practice here that only the most stable conformations for each compound are being compared in each set. For clarity. provide a few words that explain your analysis when comparing the illustrations. (12pts total for this problem) (a) ♡ va ♡ 5. (a) (3pts) Look up trans-decalin...
5. (a) (3pts) Look up trans-decalin and cis-decalin in your text book. Which of these is not able to undergo a chair-flip? Briefly explain. с The tetracyclic structure (shown below) is comprised of rings A,B,C, and D and it represent a typical steroid skeleton along with the numbering scheme used for this class of compounds. The methyl (Me) groups and hydrogens (H) atoms shown are at the bridgehead positions and stereochemistry has been shown for clarity. 112 Me D (b)...
Question 1: Compare the possible ring
structures and conformers for fructose and decide which is
preferred (if any). There are four main hemi-ketal rings, one of
which is shown below. What factors might influence the preference
for 5- or 6-membered rings?
Question 2: Make a model of vitamin C. Note the
lactone link that forms the ring, rather than the hemi-ketal that
is present in fructose. Do you think the presence of sp2
carbons in the ring induce strain? Does...
Question 3 Homework. Unanswered The compounds represented by the structures below are: CH3 CH3 and O A constitutional isomers o B identical o C cis/trans isomers o D conformers O E different compounds (not isomers)
Tor F 1. With the exception of steroids, all lipids contain at least one fatty acid. 2. Some lipids contain monosaccharides as part of their structure. 3. Some lipids contain an amino acid as part of their structure. 4. Glycerophospholipids contain a phosphate portion in their structure. 5. All lipids have a molecule of glycerin as their backbone. 6. Polyunsaturated fatty acids have more than one C-C double bond in their "backbone." 7. Fatty acids are soluble in water. 8....
Q1.The structures below are: (2pts) A) Enantiomers B) Cis-trans isomers C) Structural isomers D) Both A and B
19. The degree of membrane fluidity depends on . the percentage of lipids that contain choline b. the percentage of glycolipids c. the percentage of faty acids d the percentage of unsaturated farty acids Membeane proteins can be located a. entirely within the membrane b on the surface of the membeane c. in either position d. the position cannot be determined 20. 21. Which property has not been observed for membrane proseins? a energy storage b. transport of substances into...
Please help!!
1. a. Draw the structures of A and B (resonance structures), and C (tetrahedral intermediate). Use curved arrows to show how each structure is formed b. Draw the structure of the Nu: you would use to make CompoundD O (tetrahedral intermediate) он c. (i) Explain why H does not react with a pi bond in the ring in Compound Z. (ii) Which resonance structure, A or B, shows why reacting H with the ketone makes the more reactive?...
select the appropriate structures for A B C and D
Brz HNO3 حواء H₂ •Pd/c H₂SO4 Alcz B с A. B C Structure Bank NO2 CI СІ NO2 В 'N NO2 NO2 CI NHL NH ci NO 1 2 3 4 5 7 8
21. Which property has not been observed for membrane proteins? a. energy storage b. transport of substances into and out of the cell catalysis (enzymatic activity) acting as a receptor c. d. 22. In the fluid mosaic model of membrane structure the proteins are specifically bonded to the lipids b. a. the proteins "float" in the lipid bilayer the proteins are sandwiched between the lipid molecules c. d. the lipids are sandwiched between the protein molecules 23. All steroids contain...
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