Concept explainers
Interpretation:
The structure and the geometry around the indicated atoms of the given molecular model of methionine has to be determined.
Concept introduction:
Molecular geometry can be predicted from the structure by using the valence-shell Electron-pair repulsion (VSEPR) model.
-Count the number of valence electron pairs (bond pairs and lone pairs).
-Assume that the valence electron pairs form a structure that allows them to be as far away from each other as possible.
-If there are only two bond pair electrons, the molecule is linear.
-If there are three bond pair electrons, the molecule is shaped like a trigonal planar.
-If there are four bond pair electrons, the molecule is shaped as a regular tetrahedral.
- Repulsion between lone pair-bond pair of electrons effect the geometry of molecules.
Want to see the full answer?
Check out a sample textbook solutionChapter 4 Solutions
Fundamentals of General, Organic, and Biological Chemistry (8th Edition)
- Draw the chemical structure of an alanine pentapeptide. Indicate the location of each peptide bond. Label the phi () and psi () dihedral angles. Name and briefly define the four levels of protein structure.arrow_forwardDraw the two possible Haworth structures (both alpha and beta anomers) for the following monosaccharides and give their corresponding systematic names. [Show the stepwise process]arrow_forwardDraw the four stereoisomers of threonine as Fischer projections.arrow_forward
- Draw the structure and name the following polypeptides: 1. SRAL b. ENIRYTAKarrow_forwardName and draw the structures of the amino acids that fit the following descriptions:(a) Contains an isopropyl group(b) Contains a secondary alcohol grouparrow_forwardStructure A and B are two amino acids, which eventually form a dimer called A-B. Identify the functional group of structure A and structure B which are forming the chemical bond in the dimer A-B. . What bi-product will be produced along with this dimer? (2)arrow_forward
- Aspartame (NutraSweet), an artificial sweetener, is a dipeptide composed of Asp-Phe in which the carboxyl terminus is modified by the attachment of a methyl group. Draw the structure of Aspartame at pH 7.arrow_forwardDraw the zwitterion for each of the following amino acids: glycine threonine glutamic acid phenylalaninearrow_forwarda) Circle or highlight with yellow coloring each essential amino acid residue that appears in the hirudin sequence. b) The prototropic groups and their stoichiometry in hirudin are listed below. Calculate the charge on hirudin at pH values 3 and 4 and then estimate its isoionic point.arrow_forward
- Draw the two possible Haworth structures (both alpha and beta anomers) for the following monosaccharides and give their corresponding systematic names. [Show the stepwise process] D-Ribose D-Galactose D- Fructosearrow_forwardDraw a ceramide with a (16:1n-7) fatty acid attachedarrow_forwardSerine is an uncharged, polar amino acid (below and left). Threonine (below and right) is another uncharged, polar amino acid. Illustrate the hydrolysis of a dipeptide that was made from these two amino acids. Be sure to write all involved reactants and products in the structural form like Serine, and as a proper chemical equation; eg. reactant(s) – product(s). Your diagram of the dipeptide must show the N-terminal and C-terminal ends at opposite sides of the dimer molecule, and you need to indicate where the peptide bond is with an arrow/highlighter. 2. H C-N OH NH, но CH, CH,-CH -C-COOH онarrow_forward
- BiochemistryBiochemistryISBN:9781319114671Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.Publisher:W. H. FreemanLehninger Principles of BiochemistryBiochemistryISBN:9781464126116Author:David L. Nelson, Michael M. CoxPublisher:W. H. FreemanFundamentals of Biochemistry: Life at the Molecul...BiochemistryISBN:9781118918401Author:Donald Voet, Judith G. Voet, Charlotte W. PrattPublisher:WILEY
- BiochemistryBiochemistryISBN:9781305961135Author:Mary K. Campbell, Shawn O. Farrell, Owen M. McDougalPublisher:Cengage LearningBiochemistryBiochemistryISBN:9781305577206Author:Reginald H. Garrett, Charles M. GrishamPublisher:Cengage LearningFundamentals of General, Organic, and Biological ...BiochemistryISBN:9780134015187Author:John E. McMurry, David S. Ballantine, Carl A. Hoeger, Virginia E. PetersonPublisher:PEARSON