Lefer to the figure showing the molecular structure of dimethylmercury. H–C-Hg C-H H. Exposure of human skin to a single drop of dimethylmercury can lead to death, as it is highly poisonous and passes easily cell membranes. Based on its structure, why is it able to pass so easily through cell membranes? I-0-I IICIH

Lefer to the figure showing the molecular structure of dimethylmercury. H–C-Hg C-H H. Exposure of human skin to a single drop of dimethylmercury can lead to death, as it is highly poisonous and passes easily cell membranes. Based on its structure, why is it able to pass so easily through cell membranes? I-0-I IICIH

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter3: The Chemistry Of Life: Organic Compounds

Section: Chapter Questions

Problem 4TYU: The synthetic process by which monomers are covalently linked is (a) hydrolysis (b) isomerization...

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In 1976, a team of chemists in the United Kingdom was developing new insecticides by modifying sugars with chlorine (Cl2), phosgene (Cl2CO), and other toxic gases. One young member of the team misunderstood his verbal instructions to test a new molecule. He thought he had been told to taste it. Luckily for him, the molecule was not toxic, but it was very sweet. It became the food additive sucralose. Sucralose has three chlorine atoms substituted for three hydroxyl groups of sucrose (table sugar): The altered sugar binds so strongly to the sweet-taste receptors on the tongue that the human brain perceives it as 600 times sweeter than sucrose. Sucralose was originally marketed as an artificial sweetener called Splenda, but it is now available under several other brand names. Researchers investigated whether the body recognizes sucralose as a carbohydrate by feeding sucralose labeled with 14C to volunteers. Analysis of the radioactive molecules in the volunteers urine and feces showed that 92.8 percent of the sucralose passed through the body without being altered. Some people are worried that the chlorine atoms impart toxicity to sucralose. How would you respond to that concern?
At pH 7, tryptophan crosses a lipid bilayer at about onethousandththe rate of indole, a closely related compound: Suggest an explanation for this observation.
Sphingolipids can contain of all of the following except A. glycerol. B. sphingosine. C. phosphocholine. D. a mono- or oligosaccharide.
Draw a cholesterol molecule and indicate the isopentenylunits.
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C8H17NO2 is heated, and a condensation reaction occurs. A new molecule containing one peptide bond is formed and has the molecular formula C8H15NO. Draw the skeletal structure of this new compound.
Acetone, CH3–(C=0) –CH3, and urea, NH2–(C=0)–NH2, have similar chemical structures. (a) Compare the possible intermolecular forces for acetone with those for urea. (b) Compare the intermolecular forces between phycocyanin and acetone with those between phycocyanin and water. Briefly explain how acetone disrupts the folding in phycocyanin. (c) Compare the intermolecular forces between phycocyanin and urea with those between phycocyanin and water. Briefly explain how urea disrupts the folding in phycocyanin. (d) Compare your experimental observation on the disruption of phycocyanin folding in the presence of acetone with that in the presence of urea. Briefly explain whether your comparison is consistent with the properties of acetone and urea.
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1.Circle and identify allfunction groups found in a sugar called “aldose” depicted below. Do NOT use the internet but you may use your notes to answer this question.
Hydrolysis of a mixture of glycerophospholipids may yield the following, EXCEPT: A. Galactose B. Choline C. Serine amino acid D. Phosphate
Draw the tripeptide gly-glu-phe with all ionizable groups in their predominant state at pH 7.0.
When bonding 1 glycerol molecule, with 3 fatty acid molecules, you can build a tryglceride. In addition to the tryglyceride, can you make any other molecules in the bonding process?