A) what does the figure illustrate? B) Label the components in the figure pointed by the arrows and briefly mention the bonding partners involved in each case

Which one of the following types of bond is principally responsible for holding the α-helix shape of a protein secondary structure : A) peptide B) disulfide   C) hydrogen   D)ionic

Describe, identify, and DRAW the monomers (e.g. what is typically illustrated as a hexagon?) andpolymers of:a. Proteinsb. Carbohydratesc. Lipids Identify the type of chemical bonds that join the monomers of:a. Proteins (describe the structure and function of a polymer)b. Carbohydrates (describe the structure and function of a polymer)c. Lipids Identify the portions of the cell membrane (phospholipid bi-layer) that area. Hydrophobicb. Hydrophilicc. Polard. Non-polar

Consider the following fatty acid attached below.    a) What is the number convention for this fatty acid above, including the location of the double bond from the α carbon end? Remember to use the Δ (delta) in your answer for the double bond location b) What is the ω (omega) numbering of the double bond for the fatty acid above? c) What is the product after two hypothetical additional rounds of synthesis for the fatty acid? Remember that synthesis adds 2 carbons at a time to the carboxylic end.

1. A) Draw a guanylate nucleotide and label the three main structural features B) Does this contain a purine or pyrimidine base? C) Would this nucleotide be found in DNA or RNA? Why? D) To which carbons of the furanose sugar are the other important structural features attached? E) Draw an adenylate residue bonded to the guanylate from below as it would be in a nucleic acid chain F) Label the phosphodiester bond G) Label which side of your dinucleotide is the 5' and 3' side H) Draw the nucleotide residues that base pair with guanylate and adenylate in the position and location that would permit pairing 1) Draw the hydrogen bonds that occur in both pairings.

A binding protein binds to a ligand L with a Kd of 400 nM. How much ligand is present when Y is (a) 0.25, (b) 0.6, (c) 0.95?

1. What is the isoelectric point (pI) of lysine which has pKa values of 2.1 for the α carboxyl group, 9.7 for the α amino group and 10.5 for the side chain amino group? 2. Which of the following is most likely to be found on the exterior of a protein? A) Pro B) Trp C) Ser D) Glu 3. The type of reaction that forms a peptide bond is A) Elimination B) Hydrolysis C) Nucleophilic substitution D) Condensation

Having peptides arranged in a beta sheet would be an example of a secondary structure A) True B) False

Proper folding is essential for most proteins to function. Which of the following statement about protein folding are correct. There may be more than 1 right answer. a) changing the primary sequence will change the final conformation b) desaturation results in a protein that has a higher free energy than the native conformation c) protein spontaneously fold into their correct shape d) denatrutation will cause a protein to lose its tertiary structure

This amino acid is: (Note that the non-ionized form is shown; remember that backbone groups are irrelevant to classification) a) Polarized (+) charged b) Nonpolar c) Polar and (-) charged d) Polar uncharged