Which type of amino acid would be found on the outside of a portion of a protein embedded in the membrane (up close to the fatty acid tails)? Select one: O a. a special amino acid like glycine or proline Ob. a polar amino acid like serine c. a hydrophobic amino acid like valine Od. a charged amino acid like lysine O e. any of the above, with no preference Clear my choice

On 4. Below is a polypeptide with an unknown number of amino acids. On the diagram below: a. Circle EVERY peptide bond b. Circle and number each amino acid from 1, 2, 3, and so on; from left to right c. Label each amino acid as polar, non-polar, or electrically charged d. Label the N-terminus and C-terminus e. Select three pairs of amino acids that could potentially interact to influence tertiary structure AND state the bond/force/interaction type involved in each pair. H₂N-CH-C-N-CH-C- CH₂ CH₂ CH₂ NH CINH NH₂ Accessibility: Investigate CH₂ -NH -CH-C-N- CH-OH CH3 -CH-C-N CH₂ CH₂ -N- OH CHIC-OH CH₂ OH

The side chain of which of the following amino acids is most hydrophilic a. Phe b. Val c. Leu d. Cys e. Ala

Part A Drag each amino acid into the box corresponding to its classification. Reset Help 中 H NH3 CH2 CH2 CH2 CH2 HN-C -COO" HN-Ç-CO0 CH2 CH2 CH2 CH2 甲 H-C-CH3 H3N-C-COO 甲 NH2 ČH3 H3N-C-coo H Polar non-charged Polar negatively-charged Non-polar Polar positively-charged