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Concept explainers
(a)
Interpretation: The validation about the given molecule being achiral has to be stated.
Concept introduction: A center to which four different groups are attached in a tetrahedral geometry and show handedness is called chiral center. The molecule containing the chiral center is called chiral molecule.
(b)
Interpretation: The validation about the given molecule being achiral has to be stated.
Concept introduction: A center to which four different groups are attached in a tetrahedral geometry and show handedness is called chiral center. The molecule containing the chiral center is called chiral molecule.
(c)
Interpretation: The validation about the given molecule being achiral has to be stated.
Concept introduction: A center to which four different groups are attached in a tetrahedral geometry and show handedness is called chiral center. The molecule containing the chiral center is called chiral molecule.
(d)
Interpretation: The validation about the given molecule being achiral has to be stated.
Concept introduction: A center to which four different groups are attached in a tetrahedral geometry and show handedness is called chiral center. The molecule containing the chiral center is called chiral molecule.
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Chapter 18 Solutions
EBK GENERAL, ORGANIC, AND BIOLOGICAL CH
- Draw a structural formula for a nucleoside composed of the following. Q.) a-d-Ribose and adeninearrow_forwardThere are a total of six different amino acid sequences for a tripeptide containing one molecule each of serine, valine, and glycine. Using three-letter abbreviations for the amino acids, draw the six possible sequences of amino acids.arrow_forwardSketch the titration curve for the amino acid alanine with pka1 = 2.34 and pka2 = 9.69.arrow_forward
- Histidine is an amino acid with three titratable groups: an -NH3+ group (pKa = 9.2), a -COOH group (pKa = 1.8), and an imidazole (amine-like) group (pKa = 6.0). The titration curve for histidine is shown below with four points highlighted. (a) Identify which point on the titration curve corresponds to the pKa for each of the titratable groups, and which point corresponds to the pI. Explain your choices. (b) Calculate the value of pI for histidinearrow_forwardDraw a structural formula for a nucleoside composed of the following. Q.) b-2-Deoxy-d-ribose and cytosinearrow_forwardDraw the titration curves for the following AA’s: Aspartic acid, Alanine, Lysine, Valine, Serine, and Trrosine.arrow_forward
- A nucleoside consists of an organic base, bound to ribose or deoxyribose. Draw the structure for deoxyguanosine, formed from guanine and deoxyribose.arrow_forwardAvidin exists as a protein complex of around 68 kDa. Research to determine the types of interactions that hold the avidin complex together. Based on your research, which molecular weight would you expect for avidin when treated with beta-mercaptoethanol and run through an SDS-PAGE gel? Question options: 34 kDa 19 kDa 68 kDa 11 kDaarrow_forwardYou are studying the toxic protein called ectatomin, a major component of ant venom (specifically from the species Ectatomma tuberculatum), that embeds into cell membranes and creates pores that cause cells to lyse. Ectatomin is a small dimer, meaning the protein is comprised of two polypeptides; the sequences of the two polypeptides are given in the table with single-letter abbreviations. polypeptide sequences of ectatomin monomers polypeptide protein sequence polypeptide 1 GVIPKKIWETVCPTVEPWAKKCSGDIATYIKRECGKL polypeptide 2 WSTIVKLTICPTLKSMAKKCEGSIATMIKKKCDK You could use absorbance at 280?? or colorimetric assays like the Bradford assay or bicinchoninic acid assay (BCA) assay to quantify the amount of ectatomin you have for your experiment. Why might you choose to use a colorimetric method instead of absorbance at 280??? Select the best answer. Measuring absorbance at higher wavelengths, like 595?? or 562??, is more accurate than measuring absorbance at…arrow_forward
- Draw the four stereoisomers of threonine as Fischer projections.arrow_forwardComplete the following table by providing the Fischer and Haworth Projections of the given sugars. In the Fischer Projection put an asterisk (*) mark in the chiral centers of the molecule. Sugar Fischer Projection Haworth Projection (Complete) alpha-anomer Haworth Projection (Abbreviated) beta-anomer D-Mannose D-Xylose L-Lyxosearrow_forwardcalculate the pI for tripeptide R-H-Darrow_forward
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