The pi-helix is a rare secondary structural element in proteins that resembles an alpha helix but has slightly different properties. Notably, hydrogen bonds within a pi-helix display a repeating pattern in which the backbone C=O of residue i hydrogen bonds to the backbone HN of residue i+5. Based on this information, which of the following are true? Select all that apply. O The hydrogen bonding distance between C=O and NH groups remains unchanged between pi-helices and alpha-helices The torsion angles of amino acids found in pi-helices are the same as those found in alpha-helices Pi-helices have a smaller rise per residue compared to alpha- helices Pi-helices have fewer residues per turn compared to alpha-helices Pi-helices have more residues per türn compared to alpha-helices O Pi-helices are left handed

Q: 3b) Both a-helical 2° structure and b-pleated sheet 2° structure result from the same type of…

A: Proteins are the unbranched polymer of amino acids. They have four different level of structural…

Q: Two peptide segments are shown below. Predict which one would have the most negative AG when going…

A: Protein folding is a spontaneous reaction by which most of the proteins fold inside the cell without…

Q: Long-range interactions between residues on a single polypeptide chain are classified as quaternary…

A: Proteins are the linear chain of amino acids attached together via peptide bonds. Proteins are…

Q: Indicate which of the amino acid residues in the following peptide sequence contains a group that…

A: Amino acids are biomolecules that have an amino group and a carboxyl group linked to the same carbon…

Q: Find the charge of the peptide KEALYR at pH 7.2. Below is the pKa chart. Provide your answer up to…

A: Before going into the intricate and precise calculation that gives us the charge of the given…

Q: You analyze a protein of 100 kDa using SDS-PAGE in the absence and presence of �-mercaptoethanol…

A: Multisubunit proteins are composed of more than 1 polypeptide chain.SDS (sodium dodecyl sulfate)…

Q: Assume you have a long polypeptide chain of Ser-Asp dipeptides linked end to end.  Explain the…

A: Serine is described as an amino acid that is majorly used in the process of biosynthesis of…

Q: What would the net charge be of a polypeptide with the sequence M-D-R-N-Q-K at pH 8? hint ionizable…

A: Amino acids are the simplest units for the formation of peptides or proteins. The amino acids are…

Q: The structures of the amino acids lysine and aspartic acid are shown: H CH₂ OH НО NH, Lysine…

A: The goal is to explain how the structure of amino acids affects their function, notably the…

Q: A synthetic polypeptid made up of L-glutamic acid residues is in a random coil configuration at pH…

A: Hydrophobic effect: non-polar side groups that do not ionize interact with other non-polar side…

Q: say you have been asked to determine the molecular structure of a soluble protein with roughly 500…

A: Determining the structural basis of protein in a molecular or even atomic level would enable us to…

Q: Cyclic nucleotides (e.g., CGMP, CAMP) frequently make use of the same parts of the ribose ring;…

A: cGMP and cAMP are cyclic nucleotides where a cyclic bond is formed between sugar and phosphate…

Q: An π helix can be described as a 4.4 helix. Explain 16 what this designation means. Given the pitch…

A: ●A π helix is a type of secondary structure found in proteins.The amino acids in a standard π-helix…

Q: Within a naturally-occurring polypeptide, under neutral pH conditions (pH = 7.0), which of the…

A: Proteins are macromolecules composed of polypeptides which contains more than 20 amino acids. Each…

Q: Helices can be described by the notation nm,where n is the number of residues per helical turn and m…

A: Proteins are a type of macromolecule that have a variety of roles in biological processes. It is…

Q: What does the "alpha" indicate in "α-helix"? It is a Greek helix. It's position lies above the…

A: Proteins are composed of twenty standard amino acids attached together via peptide bonds. The linear…

Q: Alpha helices are a type of secondary structure in proteins. What is the length of a 23.0 kDa…

A: The alpha helix is a relatively common motif among the secondary structure of proteins - a secondary…

Q: Each amino acid in a run of several amino acid residues of a polypeptide chain have phi values of…

A: Ramachandran plot gives the statistical distribution of the combinations of the dihedral angles ϕ…

Q: Which amino acids would you expect to find marked on the alpha helix? Alanine Isoleucine Leucine…

A: A prevalent motif in the secondary structure of proteins, the alpha helix (-helix) is a right-hand…

Q: You have discovered a new amino acid that you name in honor of your favorite course.…

A: The titration curve of an amino acid shows the change in pH as an acid or base is added to the…

Q: An oligopeptide has the following amino acid sequence:…

A: Amino acids are the monomeric unit to form polypeptides. There are 20 different amino acids that…

Q: why do you think this is? In your explanation, you should describe the specific molecular…

A: 1. Proline is rarely found in beta sheets or alpha helices this is because proline is totally…

Q: You are working on a protein with the following sequence in an area of interest.…

A: Proteins are made up of different amino acids. Some amino acids have ionizable side chains. All…

Q: Which of the following statement is not true?     In a secondary structure the consecutive…

A: The secondary structure of a protein refers to the spatial arrangement of the main chain atoms of…

Q: What does this statement mean: "Upon folding of a protein many main chain amides replace their…

A: Polypeptide chains are composed of amino acids bonded to each other via peptide bonds. Peptide bonds…

Q: Consider beta-sheet comprised of twelve amino acid residues (two strands of six residues each). How…

A: Proteins are the macro molecules that show great diversity in their structure. They show four levels…

Q: is it true that aplha and beta are made up of same amino acids but Beta chain is longer than alpha…

A: Hemoglobin (Hb) is a complex protein which is consist of two parts - the heme and the globin. Heme…

Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.