Biyokimya
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BIOL0280 First Midterm Examination 2013
Is the molecule shown D- or L-alanine? D-alanine 2. [2 points] What kind of reaction is peptide bond formation (eg. redox, cleavage, hydrolysis, etc)? a condensation reaction 3. [2 points] In a highly basic solution, pH = 13, the dominant form of glycine is: A) NH —CH —COOH. 2 2 – B) NH —CH —COO . 2 2 + – C) NH —CH —COO . 2 3 D) NH +—CH —COOH. 3 2 + – E) NH —CH —COO . 3 2 Circle the correct answer. 4. [6 points] Draw…
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BIOL0280 First Midterm Examination 2012
Draw the structure of Ala–Glu-Gly in the ionic form that predominates at pH 7. Draw all atoms (including hydrogens) as well as any charges as necessary. O O O H H H N CH C N CH C N CH C O 3 CH3 CH2 H CH2 C O O 2. [2 points] Titration of isoleucine by a strong base, for example NaOH, reveals two pK ’s. The titration reaction occurring at pK (pK = 2.4) is: 1 1 − − A) —COOH + OH → —COO + H O.…
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Biochemistry Problems and Solutions ( Eric R. Gauthier, Ph.D. )
BIOCHEMISTRY I (CHMI 2227 E) PROBLEMS and SOLUTIONS Eric R. Gauthier, Ph.D. Department of Chemistry and Biochemistry January 2007 Note: This problem set has been prepared for students taking the course Biochemistry I (CHMI 2227E), as offered at Laurentian University. It contains several problems taken from textbooks and from the author’s imagination. While the vast majority of the problems found in this book can be relatively easily solved with the help of the class notes, more difficult questions have also been included. Questions marked by a star (*) will require…
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Amino Acids and Peptides
Biomolecules: Amino Acids and Peptides Lecture 4 Outline ●Present and discuss the properties of amino acids ●Discuss the importance of pKa values and amino acid titration curves ●NOTE: Ignore the techniques section in your book chapter 4 (p. 33-34) Non-protein Amino Acids Examples of Clinical Aminoacidurias ●Metabolic defects: Phenylketonuria (Phe), Tyrosinemias (Phe,Tyr), Maple Syrup Urine Disease (Leu, Val, Ile), Alcaptonuria (Tyr) ●Absorption/transport defects: cystinuria (Cys), Hartnup disease , Fanconi’s Syndrome ●These diseases are generally diagnosed from indicators in the urine or plasma. These diseases will be discussed further in the…
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Biochemistry Lecture Note
Biochemistry Biochemistry is the study of the chemistry of living organisms. Biomolecules are often sorted into four categories: (1) peptides and proteins, (2) carbohydrates, (3) nucleic acids, and (4) The term protein comes from the Greek proteios, which means “of first importance.” Biochemistry, for many years, was almost synonymous with the study of proteins because these compounds serve the broadest array of functions of any class of biomolecules, Structure: The actin and myosin in muscles, the collagen in skin and bone, and the keratins in hair, horn, and hoof are…
