Biochemistry: Concepts and Connections (2nd Edition)
2nd Edition
ISBN: 9780134641621
Author: Dean R. Appling, Spencer J. Anthony-Cahill, Christopher K. Mathews
Publisher: PEARSON
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Chapter 2, Problem 21P
Is RNA-binding enzyme RNase A more likely to have a pl of 9.2 or 5.0? Briefly explain your reasoning.
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Chapter 2 Solutions
Biochemistry: Concepts and Connections (2nd Edition)
Ch. 2 - Suppose a chloride ion and a sodium ion are...Ch. 2 - Draw two different possible hydrogen-bonding...Ch. 2 - Prob. 3PCh. 2 - 4. What is the pH of each of the following...Ch. 2 - Prob. 5PCh. 2 - The weak acid HA is 2% ionized (dissociated) in a...Ch. 2 - 7. Calculate the pH values and draw the titration...Ch. 2 - What is the pH of the following buffer mixtures?...Ch. 2 - a. Suppose you wanted to make a buffer of exactly...Ch. 2 - Prob. 10P
Ch. 2 - You need to make a buffer whose pH is 7.0, and you...Ch. 2 - Describe the preparation of 2.00 L of 100 glycine...Ch. 2 - Carbon dioxide is dissolved in blood (pH 7.4) to...Ch. 2 - What is the molecular basis for the observation...Ch. 2 - The anno acid arginine ionizes according to the...Ch. 2 - It is possible to make a buffer that functions...Ch. 2 - A student is carrying out a biological preparation...Ch. 2 - Histidine is an amino acid with three titratable...Ch. 2 - Prob. 19PCh. 2 - A biochemical reaction takes place in a 1.00 ml...Ch. 2 - Is RNA-binding enzyme RNase A more likely to have...Ch. 2 - Consider a protein in which a negatively charged...Ch. 2 - Prob. 23PCh. 2 - Prob. 24P
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- (A) Give the polypeptide translation of the RNA sequence below. 5’-AUGGAAAUCAAAGUCAACCUUGAGUUUAGA-3’ (B) Write the chemical structure of the polypeptide sequence you determined in part (a) (C) Given the chemical structure of the polypeptide sequence you have written in part (b), answer True or False for each of the 5 statements below. (1) At least one of the amino acids in the sequence can undergo phosphorylation (2) The sequence looks like it could form a β turn (3) The sequence looks like it could form a β strand with one surface facing the interior of the protein and the other surface exposed to water (4) At least one of the amino acids in the polypeptide sequence can undergo oxidation to form a disulfide bridge to another polypeptide (5) The sequence looks like it could form an α helix that would be part of a coiled coil structure within a proteinarrow_forwardAmino acids have an average molar mass of 100 g/mol.How many bases on a single strand of DNA are needed to codefor a protein with a molar mass of 5x10^5g/mol?arrow_forwardHere’s a Ramachandran plot. Give the dihedral angles--phi and psi--that are characteristic of a left handed helix.arrow_forward
- The primary amino acid sequence of a stretch of polypeptide is Asp-Glu-Pro-Lys-His-Arg. Would you expect this portion of the polypeptide to form an alpha helix at pH=5? Provide 3 reasons to justify your answer.arrow_forwardWhy is RNA polymerase a good name for this enzyme? Explain each part of the name: RNA, polymer and asearrow_forwardRNA nucleotides can undergo versatile base pairing. What does this mean, and what is the consequence for the structure of RNA? Please help simplify/explain this in 5 sentences or lessarrow_forward
- Which amino acid (also called amino acid residue)would be more likely to occur on the surface of a protein: an aspartate residue or a methionine residue? Explain your choice.arrow_forwardA mutation called base substitution mutation had been altered the sequence in a. eliminated the synthesis of all the polypeptide except one. The altered sequence is 5’ – AUGCAUACCUAUGUGACCCUUGGA – 3’. Use the genetic code table and determine why.arrow_forwardIn 1962, F. Chapeville and others reported an experiment in which they isolated radioactive 14C-cysteinyl-tRNACys (charged tRNACys + cysteine). They then removed the sulfur group from the cysteine, creating alanyl-tRNACys (charged tRNACys + alanine). When alanyl-tRNACys was added to a synthetic mRNA calling for cysteine, but not alanine, a polypeptide chain was synthesized containing alanine. What can you conclude from this experiment?arrow_forward
- A protein produced by bacteria is 300 amino acids long. Compute for the number of nucleotides in the section of DNA that code for this protein.arrow_forwardThe enzyme thiouridylase converts certain tRNA uridine residues to 2-thiouridine. Draw the structure of this modified nucleotide.arrow_forwardGiven the fragment Ala-Lys-Tyr-Gly-Phe and Leu-Val-Ser-His-Cys-Arg, what is the expected result in both fragments with CuSO4 and NaOH? a. dark violet solution b. light violet solution c. blue solution d. colorless solutionarrow_forward
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