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Bryan Sy

Bryan S.

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Books Assigned

Biochemistry

Biochemistry

Jeremy M. Berg,… 8th Edition
Achievement 1,076 solutions

Viewed Questions

The sequence of part of an mRNA is 5 '-AUGGGGAACAGCAAGAGUGGGGCCCUGUCCAAGGAG-3' What is the sequence of the DNA coding strand? Of the DNA template strand?

The sequence of part of an mRNA is 5 '-AUGGGGAACAGCAAGAGUGGGGCCCUGUCCAAGGAG-3' What is the sequence of the DNA coding strand? Of the DNA template strand?

Biochemistry

Protein sequencing $1 .$ Determine the sequence of hexapeptide on the basis of the following data. Note: When the sequence is not known, a comma separates the amino acids (Table 3.3). Amino acid composition: $(2 \mathrm{R}, \mathrm{A}, \mathrm{S}, \mathrm{V}, \mathrm{Y})$ N-terminal analysis of the hexapeptide: $\mathrm{A}$ Trypsin digestion: $(\mathrm{R}, \mathrm{A}, \mathrm{V})$ and $(\mathrm{R}, \mathrm{S}, \mathrm{Y})$ Carboxypeptidase digestion: No digestion. Chymotrypsin digestion: $(\mathrm{A}, \mathrm{R}, \mathrm{V}, \mathrm{Y})$ and $(\mathrm{R}, \mathrm{S})$

Protein sequencing $1 .$ Determine the sequence of hexapeptide on the basis of the following data. Note: When the sequence is not known, a comma separates the amino acids (Table 3.3). Amino acid composition: $(2 \mathrm{R}, \mathrm{A}, \mathrm{S}, \mathrm{V}, \mathrm{Y})$ N-terminal analysis of the hexapeptide: $\mathrm{A}$ Trypsin digestion: $(\mathrm{R}, \mathrm{A}, \mathrm{V})$ and $(\mathrm{R}, \mathrm{S}, \mathrm{Y})$ Carboxypeptidase digestion: No digestion. Chymotrypsin digestion: $(\mathrm{A}, \mathrm{R}, \mathrm{V}, \mathrm{Y})$ and $(\mathrm{R}, \mathrm{S})$

Biochemistry

Parathion was one of the first organophosphate insecticides. Assuming that the $\mathrm{P}=\mathrm{S}$ group shows the same chemistry as a $\mathrm{C}=\mathrm{O}$ group and that p-nitrophenoxide ion is a good leaving group, show how parathion can inactivate its target enzyme (acetylcholine esterase) by forming a stable enzyme intermediate.

Fundamentals of Organic Chemistry

Fish oils contain the fatty acids EPA and DHA. People who eat at least two fish meals a week have a lower incidence of cardiovascular disease because of the positive physiological effects of these lipids (see Box 8.A). Use the shorthand form described in Problem 1 to draw the structures of a. EPA (eicosapentaenoate, 20:5n-3) and b. DHA (docosahexaenoate $22: 6 n-3$ ).

Essential Biochemistry

Questions asked

INSTANT ANSWER

Which statement is correct? A) "Peripheral proteins typically use non-polar amino acids to bind to the surface of a lipid bilayer" B) "Peripheral proteins typically use polar amino acids to bind to the surface of a lipid bilayer" C) "Peripheral proteins typically use basic amino acids to bind to the surface of a lipid bilayer" D) "Peripheral proteins typically use acidic amino acids to bind to the surface of a lipid bilayer" E) "Peripheral proteins typically use crytine amino acids to bind to the surface of a lipid bilayer"

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INSTANT ANSWER

What is the sequence of the following peptide? - A HEXAPEPTIDE was sequenced using differing enzyme and chemical reagents. The results of these experiments, along with an explanation of how to interpret the results, are provided below. Using this information, deduce the \( 1^{\circ} \) structure for the hexapeptide. Provide the answer in Exam 2A on WileyPlus. - Show All work to receive full points!!!! Explanation of Protein Sequencing Techniques 1. The reagent 1-fluoro-2,4-dinitrobenzene (DNFB) is used to identify the N -terminal amino acid of a peptide. The reaction between DNFB and a peptide yields the product abbreviated as DNP-AA; where AA is the N-terminal amino acid of the peptide, and DNP is dinitrophenyl. 2. Trypsin is an enzyme that cleaves a peptide at the C-terminal side of \( R \) and \( K \). 3. Chymotrypsin is an enzyme that cleaves a peptide at the C-terminal side of \( \mathrm{F}, \mathrm{Y} \), and W . 4. Carboxypeptidase is an enzyme that cleaves off the C-terminal amino acid of any peptide. Results from Sequencing Experiments on the HEXAPEPTIDE A. The amino acid content in the peptide was: Y, R, M, K, G, D B. Reactions with the hexapeptide and 1-fluoro-2,4-dinitrobenzene yielded DNP-G. C. Treatment of the hexapeptide with chymotrypsin yielded two tripeptides. D. Treatment of the hexapeptide with trypsin yielded three dipeptides. E. Treatment of the hexapeptide with carboxypeptidase yielded methionine. F. N-terminal sequencing of one the chymotrypsin-produced tripeptides (from part C) yielded DNP-K

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INSTANT ANSWER

Which of the following combination of events are associated with activation of the p-adrenergic receptor pathway? I. Binding of an antagonist. II. Binding of an agonist. III. Ligand-induced membrane spanning conformational changes. IV. Ligand-induced conformational changes that occur only in extracellular region of the receptor. V. An increased association between the receptor protein and G protein. VI. An increased dissociation between the receptor protein and G protein. VII. Association of multiple subunits to form a trimeric G protein. VIII. Dissociation of the trimeric G protein. IX. Conversion of Ga(GDP) to Go (GTP). X. Conversion of GB(GDP) to GB(GTP). A. I, III, VI, VIII, & IX B. II, III, VI, VIII, & IX C. II, IV, VI, VIII, & IX D. II, III, VI, VIII, & X E. II, III, V, VII, & XI

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INSTANT ANSWER

During hibernation, thermogenin is a protein that has what property and function? A. integral protein that channels protons to the matrix B. peripheral protein that obtains electrons from the ETC Page < 7 > of 10 ZOOM + C. integral protein that channels protons into the cytosol D. peripheral protein that channels electrons into the cytosol E. integral protein that channels protons into the innermembrane space

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INSTANT ANSWER

Which of the following reaction types is used to gain energy during metabolism? A. combustion B. esterification C. hydrolysis D. reduction E. protonation

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INSTANT ANSWER

Peripheral proteins typically use which type of amino acids to bind to the surface of a lipid bilayer? A. non-polar B. polar C. basic D. acidic E. cystine

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INSTANT ANSWER

The active transport of solutes across a membrane is typically coupled to which type of reaction? A. exergonic B. endergonic C. non-spontaneous D. entropically negative E. exothermic

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INSTANT ANSWER

According to the KEGG pathway map, acetyl-CoA is a product of which metabolic processes? I. aspartate and glutamate degradation II. degradation of isoleucine III. fatty acid biosynthesis IV. fatty acid catabolism V reaction catalyzed by the pyruvate dehydrogenase complex VI. fatty acid elongation in the mitochondria VII. reaction catalyzed by pyruvate-ferredoxin oxidoreductase A) I, II, IV, V, and VII; B) II, IV, V, and VII; C) I, III, and VI; D) II, IV, and V

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INSTANT ANSWER

Which of the following enzymes catalyzes an anaplerotic reaction for the citric acid cycle? A) 1.1.5.4 B) 6.4.1.1 C) 2.2.3.1 D) 1.2.7.1

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INSTANT ANSWER

Which statement is consistent with the enzymatic steps that bypass the reactions catalyzed by 2.7.2.3 and 5.4.2.11 in glycolysis? A) The bypassed steps are catalyzed by two unique enzymes with the enzyme classification numbers 5.4.2.4 and 3.1.3.13. B) The steps cannot be bypassed. C) The bypassed steps are catalyzed by two unique enzymes with the enzyme classification numbers 5.4.2.4 and 5.4.2.11. D) The bypassed steps are catalyzed by two unique enzymes with the enzyme classification numbers 5.4.2.4 and 3.1.3.80.

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