Amino acids with ionizable side chains are found in all groups except: negatively-charged positively-charged O O polar O hydrophobic

Given the figure below. Which structure is predominant at pH = 8.0? (Note: The amino acid structures on the topmost portion are labeled as A, B, C and D from left to right) * çOOH pK1 H3Nt CH CH2 CH2 CH2 ČH2 NH3* poo H2N-CH CH2 CH2 GH2 CH2 NH2 foo H2N-CH CH2 çoo pK2 pk3 CH2 CH2 NH3* NH3* 14 1 pK2 pl pk3 12 10 pH 6 4 pK1 2 0.5 1 1.5 2 2.5 3 Equivalents of OH

Choose A if the statement is CORRECT B if the statement is WRONG This amino acid is/has: polar charged basic side chain 6. 7. 8. 9. aromatic side chain 10. K H H H N-C-C CH₂ CH ₂ CH₂ CH ₂ -Z N I NH₂ =O OH

Would each of the following ions of serine exist at a pH above, below, or at its pI? Drag the appropriate items to their respective bins. Above pl H₂N-CH-COO CH₂OH H₂N-CH-COOH CH₂OH Below pl H₂N-CH-COO CH₂OH At its pl Reset Help

Give the name and structure of at least two examples of each of the following:      Heterocyclic amino acid  Aromatic amino acid   Neutral amino acid  Acidic amino acid  Basic amino acid  Sulfur-containing amino acid

All of the following pairs are well-match, except one: O Oleic fatty acid is : unsaturated fatty acids O Saturated fatty acids : solid at room tempreture Ceramide : simplest glycerolipid O TGs: stored in adipose tissue

An amino acid structure contains a -COOH and -NH2 group in the same molecule. The -COOH group donates a proton to the -NH2 group. Because of this, the amino acid structure contains a positive charge on one atom and a negative charge on the other. What is the term used to refer to this character of amino acids? O Amphiphatic O Isoelectric point Zwitterions O Amphoteric

Do peptide bonds get protonated or deprotonated? Explain

Create an oligopeptide via dehydration synthesis using the following amino acids. O. H Tryptophan (TRP) C-C-N но сн, C-C-N. но Glycine (GLY) H H HN

The figure below illustrates the molecular structures of two fatty acids. A B H₂C The structural formula of erucic acid and behenic acid с H₂C D erucic acid behenic acid Which of the following best explains why erucic acid is liquid at room temperature but behenic acid is solid at room temperature? O OH The presence of a double carbon to carbon bond in erucic acid prevents the molecule from packing closely together. The lack of any double carbon-carbon bonds in behenic acid causes the molecule to be come polar and therefore packed more tightly. The larger number of carbon atoms in erucic acid prevents the molecule from packing tightly together. OH The smaller number of carbon atoms in behenic acid creates stronger covalent bonds between the carbon atoms allowing for them to pack more tightly together.