BIOCHEM 2EE3 Lecture Notes - Lecture 1: Cell Nucleus, Glycerol, Khonsu

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3 Apr 2018

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Biochemistry is a set of tools, or technical skills, that lend themselves to many diverse scientific. Of which are related to the study of biomedical research. Not enough to create life as we know it today. Primarily composed of c, h, n, o, p and s. Interplay between h, c and o defines life. C is the star of the show (most important in biological processes) whereas h and o are th background dancers. Contains silicon and aluminum tific fields e the. The polymerization reaction is a cond reaction, a water molecule is removed. Monomers join to make a polymer (macromolecules/complex molecules) Therefore both rna and dna are thought of as negative molecules. 1" carbon has a nitrogenous base - in dna - acgt. At the 2" carbon dna has an h. At the 2" carbon rna has an oh. The nucleic acids are joined by the 3" carbon of one nucleotide and 5" phosphate of the n nucleotide.

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.ill AT&T 9:44 AM Back Chem1B-W18-Homework5.pdf [1] This homework assignmenté·due at the begining of class on March 9., 2018, write your answers on a separate piece of paper, and show your work to receive credt Protiem 1 What distinguishes a strong acid from a weak acid7 What distinguishes a strong base from a weak base? Write out examples of the proton-transfer reaction for each as well as the equilibrium expression (K or Ko) tor each ? Wrtie equations Probiem 2 In class we dscussed e autoionization of water, What is an for the autoionization reactions for H-O and H SO Assume that both are pure iquids Problem 3 In class on Friday, we calculated the [HO-1 and [OH in stomach acid at pH 1.5 The average volume of an adult human stomach is 1L. How many H0 ions are present in a human stomach i&the pH is 2.0? How many OH- ions? man body temperatre). Problem4 any equlbnum constant. Min changes with temperature. At 37 â the pH of waner is 6.80. Caloulate the following for pure water at this temperature: b) IOH1 Problems whais a con ate acid-base pair? What is the relationship between the two members of pair? Prettem.6 Draw a Lewis structure ot each of thy tolowing acids. Then, wte balanced aciddssociaton reactions and equibrium expressions for each in water. a) Formic acid, HCOOH b) Chloric acid, HCIO, c) Dihydrogen arsenate, H As0 Probiem Z Dihydrogen arsenate is an ampiprotie substance, meaning tcan both accept and donane a proton Draw Lewis structures of the conjugate acid and the conjugate base of dihydrogen arsenate. Write the balanced base-dissociation reaction and equiibrium expression of dihydrogen arsenate in water Paatina successivo K.'s for polyprotic acids decrease. For thÃ© polyproc phosphoric acid. HAo, K., 7.2 x10. KA6.3 x 10, Ka 4.2 x 10- Draw Lewis structures of each of the species involwed in each acid- dissociation roactonãWhy d0the K.'s decrease for each successi e deprotaraton? Protiem 2 Hypochionous acid, HCIO, has a pka ol 7.54. What are the [Hs0-]. pH. [CO1 and [HCIO] in a 0.115 M solution of HCI0? Problema in a 0 735 M solution a weak acid is 12 5% dssoc ated. a) Calculatemo-1, pHÂ·[OH 1, and pH of the solution. b) Calculate Ka of the acid Problemi! Acetyisaleyic acid (asprin, structure shown to the right). HCæ¤:O4, is the most widely used pain reliever and tever reducer. Find the pH of 0.018 M aqueous aspirin at body temperature (K.: 3.6 x 104 at 37Â°C). Problem12 whyé·aqueous NaF basic but aqueous NaCl neutral? Chit consider the reaction of each anion with water 1 of 1 Previous Dashboard Calendar To Do Notifications Inbox

BIOCHEM 2EE3 Lecture Notes - Lecture 1: Cell Nucleus, Glycerol, Khonsu

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