Conversion of oleic acid to its more stable trans-isomer can be triggered by light. Do you think that oleic acid can serve as a light-sensitive molecule to enable eyesight? Why or why not? and What is the wavelength of the light that oleic acid can absorb?
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- After the reaction of 11-cis-retinal with opsin, classify the reaction rhodopsin undergoes in the presence of light to produce 11-trans-rhodopsin. (b) howmany hydrogens are present in 11-cis-retinal? (c) What arethe functional groups present in this molecule?what amino acid/s do not rotate the plane-polarized light?α-D-Galactopyranose rotates the plane of polarized light, but the productof its reduction with sodium borohydride (galactitol) does not. Explain thedifference.
- Which one of the following statements about the molecular structure of phosphatidylcholine is TRUE? a. It contains an isoprene chain. b. It contains a polar hydrophobic head group. c. It contains at least five alkene double bonds. d. It contains a phosphodiester bond. e. It contains a glycosidic linkage.The shape of hair is determined in part by the pattern of disulfide bonds in keratin, its major protein. How can curls be induced?If a pure solution of sphingomyelin was placed in water, would the sphingomyelin molecules interact with water? If so, how?
- What is 11-cis-Retinal ?Consider the tripeptide Glu-Asp-Phe. What is the approximate isoelectric of this molecule? In which direction will the tripeptide move in an electric field at pH 1, 5, 10, and 12.The shape of hair is determined in part by the pattern of disulfide bonds in keratin, its major protein. How can curls be induced? Explain chemically the basic steps (type of chemical and order) of what a hairstylist would use to treat the hair.