5. What enzyme/s is/are responsible for lipid hydrolysis? What is their role?
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- 1. When bacteria growing well at 30°C are cooled to 20°C, which of the following membrane lipids are they most likely to synthesize, membrane lipids with saturated or unsaturated fatty acids? Explain.Which statement about the glycoprotein shown below is true? OH CH₂OH OH HN HN-C =0 CH3 H₂ Protein CH N-H Protein It contains a deoxyribose sugar that could be metabolized by human enzymes. O The monosaccharide is attached to the protein via nitrogen in a residue's a-amine. It contains a ribose sugar that could not be metabolized by human enzymes. The monosaccharide is attached to the protein via nitrogen in a residue's side chain.Match the following descriptions with the correct lipid-based compounds: Cholesterol Sphingolipids Phosphoacylgycerol Glycerophospholipids Fatty acyls…
- Which of the following might be a feature(s) of a lipid that has been converted from a fully saturated fatty acid to a fatty acid containing several trans double bonds? Select all that apply. The trans fatty acid will now have a higher melting temperature compared to the fully saturated precursor The trans fatty acid will be able to pack more closely with saturated fatty acids, than with unsaturated fatty acids containing cis double bonds The trans fatty acid will now have a lower melting temperature compared to the fully saturated precursor The trans fatty acid will be able to pack most closely with unsaturated fatty acids containing cis double bonds, than with saturated fatty acids1. (a) Arrange the following lipid molecules in the order of their relative melting points. Н.С — о-С-R Н.С — о-С-R H,C -0-ć- | НС —0—С-R НС —о-с-R' НС —о-с-R" H2C -0-Ċ-R H2C -0-C-R H2C -0-ċ-R" VI VII VIII (-olx). 0-ċ-R 180 —о-с-R 18-1 cisÃ9 -ċ-R") = 18:1transA9 (b) Give your reasons for your answer. (c) On heating lipid VI with aqueous NAOH, all the ester linkages were hydrolyzed. Draw the structure of each product of the hydrolysis. (e) Giving a reason for your answer, predict what would happen to the solubility of these products in water if, after the hydrolysis, excess acid was added to the medium to acidify it.18. Name the subunits of the four major biomolecules and then name the enzymes that chemically digest each type of biomolecule. Biomolecule Carbohydrates Proteins Nucleic Acids Subunit / Components Enzyme in Mouth X X Enzyme in Stomach X X Enzyme from Pancreas I
- 7. During amino acid catabolism, how is amino group removed and excreted in the form of urea? Please write the reactions starting from a generic amino acid to the formation of urea. Please indicate the names of enzymes, cofactors, names of substrates, and products of each reaction and the location of the reaction i.e. whether in cytoplasm or mitochondria.Name 3 types of fatty acids. Which is considered least "healthy"? Why? What foods is this type of fat found in?6. What is a glycosyltransferase? Choose all that apply Group of answer choices Catalyzes the formation of a bond between a sugar and an amino acid An enzyme that cleaves a glycosidic bond An enzyme that catalyzes the formation of a glycosidic bond An enzyme that transfers nucleotide-sugars from the cytoplasm 7. Which statement(s) is/are true about inverting and retaining glycosyltransferases? a. Inverting glycosyltransferase catalyzes the epimerization of a sugar b. Inverting glycosyltransferase alters the anomeric configuration of the glycosyl donor c. Retaining glycosyltransferase never preserves the anomeric configuration of the glycosyl donor d. Inverting glycosyltransferase switch the order of acceptor and donor. e. An SN1 reaction mechanism results in exclusive retention of stereochemistry of the anomeric carbon
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