The amino acid leucine has an Rf value of 0.73 and arginine has an Rf value of 0.20.  Draw their structures of leucine and arginine.  Then provide an explanation of their Rf value based on their structures

Highlight each peptide bond in the molecule below. In addition, list the common names of the smaller molecules that would be released if all the peptide bonds were hydrolyzed. You can add more rows to the table if you need to. (Note: you do not need to list water.) If there are no peptide bonds in the molecule, just check the no peptide bonds box below the drawing area. Ono peptide bonds Add Row I Don't Know H₂N-C Submit CH₂ CH C–NH–CH—CO0 CH, CH3 molecules released if peptide bonds hydrolyzed (list one name per row) 0 CH3 00 X S X 3 alo Ar © 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center Accessibility

Amino Acids and Proteins 1. What are the structural features of amino acids with an emphasis on essential amino acids? 2. Write the properties of amino acids: zwitterion, pka, pKb, amphoteric character, isoelectric point, and electrophoresis. 3. Write the mechanism of peptide bond formation and what are its structural features. 4. What are the different types of proteins and their function? 5. Explain the meaning and importance of the primary, secondary, tertiary, and quaternary structures of a protein and the factors that cause its denaturation.

9. For the DNA segment with nucleotide sequence 5' TATCGC 3’, how many hydrogen bonds in total hold the base pairs between this segment and its complementary strand? А. 5 В. 6 С. 15 D. 18 E. Cannot be determined 10. What is the relation between the Fischer projection of two molecules below? H H- -OH Но- но- H- Но H- H- -OH- Но- CH2OH CH2OH A. C2 epimers В. СЗ ерimers C. Enantiomers D. Anomers E. Superimposable molecules Section B: True / False (10 marks) A group is deprotonated when its pKa value is lower than the pH of the solution. 1. T or F 2. a and B configurations are used to describe enantiomers. T or F 3. Hydrogen bond can be formed between two peptide bonds. T or F 4. A single strand of RNA has 20% U so it also has 20% A. T or F 5. Arginine's pI lies between 2.34 and 9.6. T or F 6. O-6 fatty acids have fewer double bonds than @-9 fatty acids have. T or F 7. The net charge of glycine changes at different pH. T or F 8. The hydroxyl group in threonine is deprotonated at high pH. T…