Author: Anonymous

AFDELING B: KONTEKSTUELE VRAE VRAAG 2: BESIGHEIDSGELEENTHEDE Beantwoord slegs TWEE van die DRIE vrae. Nommer jou werk duidelik en beantwoord puntsgewys. 2.1 Noem of die volgende vorms van eienaarskap beperkte of onbeperkte aanspreeklikheid het:   2.1.1 Eenmansaak (1)  2.1.2 Vennootskap  (1) 2.1.3 Privaat maatskappy  (1) 2.1.4 Publieke maatskappy (1) 2.2 Verduidelik die nadele van ‘n onderneming sonder winsbejag. (6) 2.3 Noem ‘n ander vorm van eienaarskap wat soortgelyk aan die private maatskappy is. (2) 2.4 Bespreek VIER faktore wat oorweeg kan word wanneer jy ‘n vorm van eienaarskap kies. (8)   TOTAAL VIR VRAAG 2 [20]   OF    

You are given a mixture of 3 amino acids Gly, Asp, and Ile with PI values of  5.6, 2.95 and 8.86. You run an isoelectric focusing at a pH of 3. Explain what happens once the power is turned on.

ATP stores energy through its ability to lose a phosphate group to form ADP in the following reactionATP+H2O→ADP+phosphateAt body temperature, the thermodynamic values for ATP hydrolysis are as follow.ΔG = –30kJ/molΔH = –20kJ/molΔS = 34kJ/molGlycolysis is an energy-liberating process (ΔG = –218kJ/mol, ΔH = –20 kJ/mol) that is coupled with the conversion of two ADP molecules into two ATP molecules according to the following reaction.Glucose+2ADP+2phosphate→2lactate+2ATP+2H2O What is the value of ΔG (in kJ/mol) for the reaction?    

Consider a 1.00L solution initially containing 0.400 mol ammonia (NH3) and 0.600 mol of ammonium ion (NH4+). What is the pH after addition of 40.0 mL of 0.800M HCl to this solution? (NH4+, Ka = 5.6 × 10–10)?  

With respect to Amino Acid Structure, what do the terms enantiomer, diastereomer and chiral mean? How are they determined?  

Using the table below, answer the following questions about the peptide composed of  the amino acids: Arg-Glu-Ala-Asp.   Use the letters above each structure to answer the following questions: What Amino Acid structure above is the amino acid Arg ? [drop1] What Amino Acid structure above is the amino acid Glu? [drop2] What Amino Acid structure above is the amino acid Ala? [drop3] What Amino Acid structure above is the amino acid Asp? [drop4] Using the pKa values provided, what would be the charge on the peptide at a pH of 6? [drop6] Using the pKa values provided, what is the PI of this peptide? [drop7]

Heat, changes in pH, and changes in salt concentration can cause a protein to denature. Explain how these 3 factors would cause denaturation. Be SPECIFIC in the effects each would cause and on what structures.

Many anabolic reactions require the input of large amounts of energy tosynthesize large molecules. Explain how a cell provides that energy at body temperatures. 

Buffer systems usually consist of a weak acid and a weak base, and together they help to keep the pH of thecell, blood, tissue fluid, etc., within a critical range. The carbonic acid – bicarbonate ion buffer system helpsto regulate blood pH. The following chemical equation describes the chemical reactions of this buffer system.  H2CO3 HCO3- + H+ Examine the chemical equation and explain how this system works to regulate any increases or decreases inpH that may take place.

Titanium has a body-centered cubic unit cell. The density of titanium is 4.50 g/cm³. Calculate the atomic radius of titanium in angstroms. (1 Å = 10⁻¹⁰ m;  a=4r√3)