Organic Chemistry (8th Edition)
8th Edition
ISBN: 9780134042282
Author: Paula Yurkanis Bruice
Publisher: PEARSON
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Chapter 26.9, Problem 9P
If methionine is always the first amino acid incorporated into an oligopeptide, what oligopeptide is coded for by the following stretch of mRNA?
5'—G—C—A—U—G—G—A—C—C—C—C—G—U—U—A—U—U—A—A—A—C—A—C—3'
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If methionine is always the first amino acid incorporated into an oligopeptide, what oligopeptide is coded for by the following stretch of mRNA? 5′-G-C-A-U-G-G-A-C-C-C-C-G-U-U-A-U-U-A-A-A-C-A-C-3′
What is the charge of the Peptide DMQK at pH=7 ?
A) -2
B) 0
C) -1
D) +2
Given the following peptide RISAGDLEVK,
Determine the formal charge of peptide
a. pH=0.5
b. pH=7
c. pH=14
d. pH = pI (isoelectric point)
Chapter 26 Solutions
Organic Chemistry (8th Edition)
Ch. 26.1 - In acidic solutions, nucleosides are hydrolyzed to...Ch. 26.1 - Draw the structure for each of the following: a....Ch. 26.3 - Indicate whether each functional group of the five...Ch. 26.3 - Prob. 4PCh. 26.3 - If one of the strands of DNA has the following...Ch. 26.4 - The 2',3-cyclic phosphodiester that is formed...Ch. 26.5 - Using a dark line for the original parental DNA...Ch. 26.7 - Why do both thymine and uracil specify the...Ch. 26.9 - If methionine is always the first amino acid...Ch. 26.9 - Four Cs occur in a row in the segment of mRNA...
Ch. 26.9 - UAA is a stop codon. Why does the UAA sequence in...Ch. 26.9 - Prob. 12PCh. 26.9 - Write the sequences of bases in the sense strand...Ch. 26.9 - List the possible codons on mRNA that speciy each...Ch. 26.10 - Adenine can be deaminated to hypoxanthine, and...Ch. 26.10 - Explain why thymine cannot be deaminated.Ch. 26.12 - Which of the following base sequences is most...Ch. 26 - What nonapeptide is coded for by the following...Ch. 26 - What is the sequence of bases in the template...Ch. 26 - Prob. 20PCh. 26 - A segment of DNA has 18 base pairs. It has 7...Ch. 26 - Name the following:Ch. 26 - Prob. 23PCh. 26 - Propose a mechanism for the following reaction:Ch. 26 - The first amino acid incorporated into a...Ch. 26 - Match the codon with the anticodon:Ch. 26 - a. Using the single-letter abbreviations for the...Ch. 26 - Which of the following pairs of dinucleotides are...Ch. 26 - Human immunodeficiency virus (HIV) is the...Ch. 26 - If a mRNA contained only U and G in random...Ch. 26 - Why is the codon a triplet rather than a doublet...Ch. 26 - RNAase, the enzyme that catalyzes the hydrolysis...Ch. 26 - The amino acid sequences of peptide fragments...Ch. 26 - Which cytosine in the following sense strand of...Ch. 26 - Prob. 36PCh. 26 - Sodium nitrite, a common food preservative (page...Ch. 26 - Why does DNA not unravel completely before...Ch. 26 - Staphylococcus nuclease is an enzyme that...
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- 1. Type of bond a. H-bond b. Electrostatic interaction c. Hydrophobic bond d. Disulfide bond e. Peptide bond 2. Level of protein structure a. primary b. secondary c. tertiary d. quaternary 3. Method/s of denaturation. choose all that applies a. Heating to 100 degrees Celsius b. Addition of nitric acid c. Reaching Isoelectric point d. Addition of mercuric chloride e. Addition of sulphosalicylic acid f. Addition of alcohol g. Addition of ammonium sulfatearrow_forward4) Based on the following, which is true regarding the acid/base properties of guanine? pk = 2.4 palindromic pka = 9.4 NH NH NH NH H+ 10A) at physiological pH, guanine will be positively charged B) at physiological pH, guanine will be negatively charged C) at physiological pH, guanine will be neutral D) at physiological pH, guanine will be a very effective buffer against base E) at physiological pH, guanine will be a very effective buffer against acid NH₂ 4)arrow_forward(a) What products are formed when each peptide is treated with trypsin? (b) What products are formed when each peptide is treated with chymotrypsin? [1] Gly–Ala–Phe–Leu–Lys–Ala [2] Phe–Tyr–Gly–Cys–Arg–Ser [3] Thr–Pro–Lys–Glu–His–Gly–Phe–Cys–Trp–Val–Val–Phearrow_forward
- Draw the amino acids and peptide fragments formed when the decapeptide A–P–F–L–K–W–S–G–R–G is treated with each reagent or enzyme: (a) chymotrypsin; 8 pt helvetica roman (b) trypsin; (c) carboxypeptidase; (d) C6H5N = C = S.arrow_forward(a) What products are formed when each peptide is treated with trypsin? (b) What products are formed when each peptide is treated with chymotrypsin?a. Gly–Ala–Phe–Leu–Lys–Alab. Phe–Tyr–Gly–Cys–Arg–Serc. Thr–Pro–Lys–Glu–His–Gly–Phe–Cys–Trp–Val–Val–Phearrow_forwardWhich cytosine in the following sense strand of DNA could cause the most damage to the organism if it is deaminated? A-T:G-T-C-G-C-T-A-A-T-Carrow_forward
- Chemistry 1a. The lack of an asymmetric carbons and ease of rotation make glycine rich protein sequences: a. Fibrous b. Helical c. Cyclic d. Flexible e. Globular 1b. Introducing D-amino acids into peptides can be useful as a strategy to: a. Change pKa b. Reduce thermal stability c. Alter ionic strength d. Slow degradation e. Increase solubility 1c. Cellulose is not useful dietary carbohydrate because humans: a. Don’t have sufficient non-mitochondrial ATP b. Lack a 1,4-beta glycosidase c. Can’t digest branched chain carbohydrates d. Loose lactase as they mature e. Can’t absorb pentise subunitsarrow_forward(a) The isoelectric point (pI) of phenylalanine is pH 5.5. Draw the structure of the major form of phenylalanine at pHvalues of 1, 5.5, and 11.(b) The isoelectric point of histidine is pH 7.6. Draw the structures of the major forms of histidine at pH values of 1, 4,7.6, and 11. Explain why the nitrogen in the histidine ring is a weaker base than the a-amino group.(c) The isoelectric point of glutamic acid is pH 3.2. Draw the structures of the major forms of glutamic acid at pH valuesof 1, 3.2, 7, and 11. Explain why the side-chain carboxylic acid is a weaker acid than the acid group next to thea-carbon atomarrow_forward22-42 (a) How many atoms of the peptide bond lie in the same plane? (b) Which atoms are they?arrow_forward
- Following is the primary structure of glucagon, a polypeptide hormone of 29 amino acids. Glucagon is produced in the -cells of the pancreas and helps maintain blood glucose levels in a normal concentration range. Which peptide bonds are hydrolyzed when this polypeptide is treated with each reagent? (a) Phenyl isothiocyanate (b) Chymotrypsin (c) Trypsin (d) BrCNarrow_forwardIf an amino acid had the following side chain it would be identified as polar CH2 - OH A) True B) Falsearrow_forwardDraw the form of aspartate that predominates at the following pH values: pH = 6.0arrow_forward
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Nucleic acids - DNA and RNA structure; Author: MEDSimplified;https://www.youtube.com/watch?v=0lZRAShqft0;License: Standard YouTube License, CC-BY