Hopene and tetrahymanol structures differ only in the size of the last fused ring. Rationalize when in the pathway this structural difference occurs and why.
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Hopene and tetrahymanol structures differ only in the size of the last fused ring. Rationalize when...
2. Not only does an aromatic ring itself affect the reactivity of an acid derivative (an ester, on last year's quiz), substituents on the aromatic ring can further modify the reactivity. First, we will consider a phenyl amide with a para-acetyl substituent: CH, (a) What is the n-effect (resonance) of the para-acetyl substituent? How will that affect the reactivity of the other (amide) carbonyl in the molecule below (increase or decrease, compared to the same amide but with no p-...
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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...
Describe why the alternate complement pathway is activated only when associating with microbial cell surfaces.
11.28 During the last several decades, improved nutrition has resulted not only increases in height and weight, but also in shoe size. A report notes that the average American women's shoe size is now size 8.75. To test the claim that there is no difference in the shoe size average, a survey was done with 100 American women whose shoe size averaged size 9 with a standard deviation of 1.75. Test at the .10 level of significance.
Explain why the compound shown below a mixture of two interconnecting structures when treated with pcc, but produces only one compound when treated with H_2 CrO_4. Show all structures to justify this observation.
Men and women differ greatly in the way they make gametes. Compare and contrast male and female gametogenesis on the bases of: overall timing of the process (when it starts, stops, etc.), timing of the meiotic divisions, number of functional cells produced, size and content of the gametes, numbers of gametes produced (per day and in the long term), contribution to the zygote, and reproductive lifespan. Explain the hormonal control of spermatogenesis. Why is it important for inhibin to act...
Aromatic heterocycles also undergo electrophilic aromatic
substitution reactions. When furan is treated with an electrophile,
the electrophile is installed only at the C-2 position. Explain why
this reaction occurs only at the C-2 position, rather than the C-3
positions.(explain in words and resonance structures)
Question 2 (10 pts). Aromatic heterocycles can undergo EAS reactions. When furan (below) is treated with an electrophile, an EAS reaction occurs in which the electrophile is installed only at carbon 2, not carbon 3. Explain...
definitions of different political structures. Remember, you are only touching the surface when you get definitions. Capitalism , communism , fascism , socialism . Each one define it denotation and connotation.
Question 6 Horizontal analysis should be used only with income statement accounts. only when common-size statements are prepared. only with statement of stockholders' equity accounts. on income statement and balance sheet accounts as warranted. only with balance sheet accounts.
Staphylococcus aureus can only cause disease when the cells reach a certain population size. Explain how S. aureus senses its cell density and activates gene expression. Based on this knowledge, discuss how antibacterial drugs can be designed to disrupt virulence and why these drugs have potential advantages over antibiotics to treat S. aureus infection.