What feature(s) of proteins are responsible for UV absorbance at 280 nm?

Q: 1- Why do we heat the proteins before we load them on the gel? What does beta-mercaptoethanol do to…

A: Introduction :  Electrophoresis is a technique used to separate macromolecules in a fluid or gel…

Q: 2. Characterize the physical chemical properties of protein solution. What is the viscosity of the…

A: Proteins are made up of amino acids which is linked by peptide bonds by condensation reaction. The…

Q: (а) (b) (c) 200 nm 200 nm 200 nm

A: BSE: Backscattered electron imaging mode, image production of sample is formed by the electrons that…

Q: Porin proteins allow the passage of molecules that are equal or greater than 600 Dalton in size.…

A: Gram-negative bacteria are found in nature and have a thin peptidoglycan layer along with an outer…

Q: 5. How is the solubility of albumin in each organic solvent?

A: Solubility of albumin in each organic solvent :- The strongly polar,protic solvents formic acid and…

Q: List 4 tertiary interactions that exist in protein molecules and include what type of R groups (side…

A: The third major protein structure is called tertiary protein structure, which is the final specific…

Q: 5.) The side chain (R group) of tyrosine can hydrogen bond to water in two different ways. Use the…

A: Hydrogen bond is a type of noncovalent bond. Hydrogen bond is a bond between hydrogen and oxygen or…

Q: What is the region/point where AA is predominantly present as a (-2)-charged species? 5. The…

A: Amino acids are the biomolecules that contains alpha-amino and alpha-carboxylic acid groups in its…

Q: он он CH, CH, CH NH O-C 0-CH, Identify/Name the noncovalent interaction between groups in the…

A: Solution   " O " - Hydrogen bond   It is primarily electrostatic force of attraction between…

Q: 2. Consider the following paragraph from a peer-reviewed publication detailing the extraction and…

A: Lectins These are defined as glycoproteins. They have the ability to make bonds with carbohydrates…

Q: 2.) An unknown amino acid was subjected to paper chromatography with five amino acid standards in…

A: Paper chromatography is a biochemical technique that is used to separate a mixture of substances…

Q: 12. What value do O-linked saccharides serve for membrane surface proteins? Which amino acid…

A: O-linked saccharides, also known as O-linked glycans, are carbohydrates that are attached to…

Q: 9. Proteins A and B bind ligand C. Protein A binds C with a K, of 2 x 105 M-1. Protein B binds C…

A: Binding affinity is the strength of the binding interaction between a single biomolecule (protein or…

Q: 6. Hair, primarily made of a-helical Keratin protein, grows at a rate of ~ 15 cm/year. Based on your…

A: Introduction :-    One member of the family of structural fibrous proteins known as scleroproteins…

Q: 9.) Riboflavin is an interesting B-vitamin (Vitamin B2) with the given structure. Could you use the…

A: Riboflavin/ Vitamin B2 is a dietary supplement which is consumed through food. It is required for…

Q: 2. Polar covalent bonds occur due to the equal/unequalsharing of [protons/ electrons (Highlight or…

A: Biochemistry is an attempt at explaining the living cell in chemical terms. A living cell is the…

Q: Discuss how do free radicals effect living organisms and cells.

A: Here in the question asked by you there are two subparts, the question belonging to the biochemistry…

Q: . Is maldextrin a fiber or an added sugar? 2. Is fructose in a fiber bar a sugar or sugar…

A: Sugar is a carbohydrate that provide sweetness in test. "Maldextrin" is a wrong word, the right one…

Q: The shape of hair is determined in part by the pattern of disulfide bonds in keratin, its major…

A: Human hairs are the modification of the epidermis of the skin which is made up of the keratin…

Q: Isoelectric focusing is used to separate …………….. based on their ................  A. salts,…

A: Electrophoresis is a method to separate the macromolecules based on their sizes under the influence…

Q: 29) Polyethylene can be obtained in two different forms. High-density polyethylene (0.94 g/cm3 is a…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Cholesterol serves several essential functions in mammalian cells. Which of the following properties…

A: Cholesterol is a type of lipid with a steroid nucleus. It provides stability to the plasma membrane…

Q: What shapes result from secondary structure: a) β- helix & α-sheets b) α-helix and β-sheets c)…

A: Proteins are composed of amino acids that are joined together to form large polypeptide chains. The…

Q: Can proteins absorb visible light?

A: Proteins are described as the long polypeptide chain that is synthesized by ribosomes of the cells…

Q: The solvent in this chromatography experiment is 75% butanol, 12% acetic acid, and 13% water. Is the…

A: Chromatography is a lab technique that is used for separating a mixture of molecules into individual…

Q: 4. Which level of protein structure do proteins need to function (there may be more than one correct…

A: Primary structure of protein is correct odering of amino acids chain.  Exact sequence is very…

Q: 1. outline the principles and procedures of isoelectric focusing. 2. Explain the four levels of…

A: As per the central dogma of molecular biology, DNA contains the code that is necessary for the…

Q: 1. (9 pts) Draw the structures of the following molecules: a. A glucose molecule (3 pts) 2. b. A…

A: 1.) Draw the Structure oft he following moleculesa.) A glucose molecule  b.) draw the structure of…

Q: 3. Mutarotation refers to change in (A) DH (B) Optical rotation (C) Conductance (D) Chemical…

A: The answer is (B) Optical rotation, as mutarotation refers to the change in the optical rotation of…

Q: Fig. 1 180 120 60 0 Psi -60 -120- -180- Fig. 2 180 120 60 0 Psi -180 -60 -120- -180- -120 -60 -180…

A: Protein is a polymer of amino acids. The sequence of amino acids in turn dictate the final…

Q: Use the following vocabulary to label and draw a cell membrane: cytoplasm (cell lumen)…

A: In the field of cellular biology and chemistry, understanding the properties of cell membranes and…

Q: 4. Which of the following peptides would absorb light centered at 280 nm? a. ala-lys-tyr b.…

A: The aromatic side chains of the amino acids are responsible for the absorption of UV light. The…

Q: 7. What level of protein structure is retained when proteins unfold? Using what you know about the…

A: Proteins form definite three-dimensional structures. The different levels of structure from primary…

Q: 13. The structure of a lipid bilayer is determined by the particular properties of its lipid…

A: Answer: Introduction: In cell the main cell organelle is cell membrane is the outer protective…

Q: 1. What secondary structure elements comprise each zinc finger? 2. What holds together the fold of…

A: The protein motif is three-dimensional protein structural elements that are composed of a…

Q: Can proteins absorb UV light?

A: Proteins are complex biomolecules, which are composed of one or more chains of amino acids in a…

Q: . chemical can used to cross link bio molecules    -formamide -N-avetyl cysteine -hydrogen…

A: The chemical process of linking two molecules is known as crosslinking.

Q: 6. A control phospholipid membrane is isolated in which the phospholipid tails all have an 18-C…

A: Phospholipids are major membrane lipids and present as a bilayer structure. It is consist of…

Q: Explain fine structure mapping?

A: DNA mapping refers to a variety of processes that help in determining the different positions of…