Which of the following molecules is amphipathic? Select all that apply. Select all that apply A triglyceride B phosphate c phospholipid D glucose E fatty acid F cholesterol Submit
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- Determine whether each of the amino acids is polar, nonpolar, positively charged, or negatively charged at pH 7. Polar and neutral aspartate H Ser H₂N-C-CH₂-C-COO NH3 lysine Leu Nonpolar Answer Bank H OOC-CH₂-CH₂-C-COO NH3 Positively charged H CH₂-C-COO NH3 hydrophobic amino acids Negatively chargedA phospholipid can be used to do all the following except O Increase the fluidity with the presence of unsaturated fatty acid tails. create a bi-layer membrane using amphipathic properties. form a micelle using a single layer and a hydrophobic core. O connect to a glycerol molecule to create a triacylglyceride.Match lipid descriptions in column A with the phospholipid types in column B. H is attached to the phosphate group bound to C3 of glycerol backbone An amino acid is attached to the phosphate group bound to C3 of glycerol backbone A primary ammonium ion is found in its structure A quaternary ammonium ion is found in its structure A. phosphatidylethanolamine B. glycerophospholipid C. phosphatidylcholine D. phosphatidylserine
- H "H H H HO Choose all of the following are true of the given structure? (Choose all of the correct answers)Which of the following statements is true In ABO blood typing, lack of glycosyltransferase and galactosyltransferase produces AB blood group O Lipid compositions of membrane mono-layers are symmetrical O Unsaturated fatty acids have double bond(s) in the cis configuration O Sphingomyelin posses phosphoryl serine in addition to two long hydrocarbon chains, one contributed by a fatty acid and the other by sphingosineWhy might adding a strong reducing agent like Dithiothreitol (DTT) help denature an extracellular protein? O Disulfide bonds might be reduced that might be critical in stabilizing its structure O Disulfide bonds might be oxidized that might be critical in stabilizing its structure O Disulfide bonds formed inside the cytoplasm can be oxidized O Cysteines can be reduced to form stabilizing disulfide bonds
- Unlike saturated fatty acids, the tails of unsaturated fatty acids incorporate one or more _______. a. phosphate groups b. glycerols c. double bonds d. single bondsSelect ALL statements that are true about the isoelectric point (pI) of a protein a.Protein carries a net negative charge at its pIb.There is no net charge on the protein at its pIc.Above its pI, a protein is negatively chargedd.pI depends on the amino and carboxylic acid content of a proteinLong chains of beta glucose monomers are held together in microfibril bundles by bonds Vanderwaals Interaction ionic covalent hydrogen In a fat molecule a glycerol is covalently bonded to fatty acid tails by a glycosidic link a hydrogen bond an ionic bond an ester link If the R group of an amino acid is nonpolar, it probably consists of one or more methyl groups hydroxyl groups amino groups hydrophilic groups
- Which of the following descriptions is the best for a phospholipid? A polar lipid molecule that fully repels water through all its parts A lipid molecule that consists of two fatty acids, glycerol and a phosphate group and is amphipathic A polar lipid molecule that is made nonpolar by the addition of a phosphate group O A polar lipid molecule that fully interacts with water O A nonpolar lipid molecule that is made fully polar by the addition of a phosphate group so it can interact with waterMurein in a bacterial cell wall is a polymer of N-acetyl glucosamine and N-acetyl muramic acid. True or falseAmylopectin and cellulose are being compared. Which of the following choices explains the similarity between the polysaccharides? Both contain 1,4-glycosidic bonds O Both function as membrane components. O Both contain a-peptide bonds. Both have extended linear shapes.