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- Which of the following is true about a peptide bond: Electron delocalization occurs between the a-amino group of one residue and the a-carbon of the subsequent residue The peptide bond is freely rotatable along its bond axis The peptide bond contains 5 co-planar atoms Dehydration to link two residues occurs due to thermodynamic coupling to high-energy phosphate hydrolysis None of the answers are correctWhich of the following shows the reaction by which valine and leucine form a peptide bond H. H. H O -COO H2N-C-C-NH- C- C-OH + HO CH2 CH,SH ČH3 А. C. CH(CH)2 H. HN-C-C-NH-C- C-OH H,N-CH-C- + H,O HC-C-H CH2 CH2 H CH3 CH H,C-C-H CH(CH3)2 CH В. D.Which of the following amino acids have R groups that have hydrogen- bonding potential? Ala, Gly, Ser, Phe, Glu, Tyr, Ile, and Thr
- In which of the following membrane lipids is the hydrophobic tail connected to the hydrophilic head by an amide bond? O Spingolipids Phosphoglycerols O None of the options has amide bonds SterolsWhich of the following is not true about a-amino acids? have at least 2 pka values O negatively charged at pH = 1.0 most contain one chiral center can act as buffersThe Industrial process for forming methanol involvės a čatalyst: Catalyst CO + 2H2 High p.T CH;OH Draw molecular pictures showing the course of this reaction. Draw Your Solution Suggest how the catalyst might make it easier for these reactions to occur. Hydrogen gas the catalyst's surface as Hatoms, which then react with co molecules more than direct reaction of CO molecules with H2 molecules. Bonds that must be broken for this reaction to * molecule. single bondis) and : bond(s) and Occur are i * bond(s) in the H- e bond(s). Bonds that are formed are C- H- eTextbook and Media Save for Later Attempts: 0 of 3 used Submit Answer
- Which covalent bond forms when a fatty acid is attached to the following molecule by dehydration synthesis: CH2(OH)-CH(OH)-CH2(OH)? a peptide bond a phosphodiester bond an ester bond a glycosidic bond an ether bondThe dihedral or torsion angles of polypeptide backbone, the allowed values of which are summarized by the Ramachandran diagram, refer to rotation of the following pair of bonds. Cα-N and Cα-R C=O and Cα-N C-N and Cα-C Cα-C and Cα-N Cα-R and Cα-CWhich of the following criteria must be met for a side chain protecting group to be considered orthogonal to the backbone amine protecting group in SPPS? It should be soluble in water. It should react with HOBT it should be stable at conditions in which the backbone amine protecting group is labile it should be labile at conditions in which the backbone amine protecting group is labile
- Which of these statements about the tertiary structure of a polypeptide is(are) untrue? You may select more than one answer. The tertiary structure will be maintained when the solvent is changed from pure water to aqueous acetic acid. O The tertiary structure is determined in part by the formation of disulfide bridges. Hydrogen bonding interactions are responsible for formation of secondary structure but not tertiary structure, O The tertiary structure is rigid and unchanging. O Charge-charge (electrostatic) interactions can be important in the tertiary structure.Long 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 groupsWhat tertiary interaction would be expected between the following amino acids HN- OH HN- CH- OH CH-CH, covalent bond electrostatic attraction O hydrogen bonding O hydrophobic O no tertiary interaction expected