Choose the correct answer Question 801рWhich of the following is an incorrect characterization for the protein hemoglobin?O tetrameric proteinO globular proteinO simple proteinO conjugated proteinQuestion 811 рWhich of the following causes a permanent change to its target?O irreversible inhibitorO reversible noncompetitive inhibitorO reversible competitive inhibitorO positive regulatorQuestion 82Which of the following is water-soluble?O Vitamin EO Vitamin CO Vitamin KO Vitamin D

Proteins are classified as Simple proteins ( globular and fibrous proteins), Conjugated proteins,…

Answered: Which of the following is an incorrect…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Question 6 of 19 Proteasomal proteases can be inhibited by compounds such as ixazomib (shown below). How does this compound inhibit protease activity? HO Ixazomib O Uncomptetitively O Competitively O Noncompetitively
Question 14 The folding of an unfolded protein proceeds from low entropy disordered state to a single high entropy, low energy native conformation O True O False Question 15 The GroES subunit has 14 identical 549-residue subunits arranged in two stacked rings with 7 subunits eac True False
QUESTION 4 What percent are the following two 20 amino acid peptides similar? MTEKRVQDKAKLIVDEQACT MTDVRIQERTKLKVFEQLCI O 25% O 25% O 75% 90%
QUESTION 10 Select a property that does not belong to allosteric enzymes. They conform to hyperbolic Michaelis-Menten kinetics They may have binding sites for regulatory molecules that are separate from active sites They tend to have a signmoidal curve of rate versus [S] They undergo conformation changes as a result of modulator binding.
QUESTION 6 If a drug is built to bind to the active site of the enzyme, it will prevent substrate binding. This drug would be classified as a(n) allosteric activator. O allosteric inhibitor. noncompetitive inhibitor. competitive inhibitor.
QUESTION 3 Biocatalysts are effective because: O a. They increase the activation energy of a reaction Ob. They stabilize the transition state O. They decrease the rate of the reaction Od. They decrease the activation energy of a reaction QUESTION 4 Which of the following statements is INCORRECT regarding L-amino acids and D-amino acids? O NH3 group on the left of the chiral carbon in both isomers O b. They are nonsuperimposable mirror images of each other O NH group on the left of chiral carbon in L isomers Od. They are enantiomers
QUESTION 1 Which of the following concepts in column A best fits the concept in column B. p-Nitrophenyl a-D-Glucoside Action of intracellular a-GLUCOSIDASE + NaHCO3 Boiling cells Tris-pH 5.0 A. Substance that act as molecular mimic of a maltose molecule B. Develops TT-Nitrophenyl into a yellow colour reagent for measurement at 400nm c. Breaks the a-linkages of p-Nitrophenyl a-D-Glucoside, leaving p-Nitrophenyl and a glucose molecule D. Allows transport of p-Nitrophenyl a-D-Glucoside across the membrane E. Stop the reaction and release internal p-Nitrophenyl
Question 174 Why are false-negative results usually more common than false-positive results in biochemical and metabolic assays that detect the product of enzymatic reactions? O Positive results require the product being assayed for to be formed in adequate quantities to be observed and this is unlikely to occur spontaneously. O Cultures that do not grow well during the incubation for some reason can test negative due to low product formation even when they do have the enzyme being assayed for All of these O Most assays require a reagent to react with a product to produce a color change, and failure to react, perhaps due to bad reagents, will be interpreted as negative.
QUESTION 2 Which peptide will most strongly attach to a carboxymethyl ion exchange column at pH 7.4? O N'-Glu-Lys-Arg-Asp-Tyr-C' O N'-Tyr-Arg-Lys-Arg-Gly-C' O N'-Gly-Glu-Gln-Asp-Asp-C' O N'-Val-Ala-Leu-lle-Arg-C' QUESTION 3 Which will be product of transcription from this double-stranded (ds) DNA sequence? 5' - atgttcaaagcctattcg - 3' 3' - tacaagtttcggataagc - 5' O YKFRIS O uacaaguuucggauaagc O auauucaaaaccuauuca Which will be product of transcription from this double-stranded (ds) DNA sequence? 5' - atgttcaaagcctattcg – 3' 3' - tacaagtttcggataagc – 5' O YKFRIS O uacaaguuucggauaagc O auguucaaagccuauucg Ο MFKAYS QUESTION 4 The structure of hemoglobin consists of a 2a and 2B heterotetramer. O quaternary O tertiary O secondary O primary
QUESTION 4 What TYPE of inhibition is observed in the following: S E Competitive Non-competitive Uncompetitive Allosteric
QUESTION 38 Which of the following amino acids is the least abundant in proteins? V W A G
QUESTION 3 In the presence of 0.000005 M competitive inhibitor, an enzyme exhibits an apparent Km of 0.002M. If the Kt of the inhibitor is 0.0000003 M, what is the true Km of the enzyme? Give your answer with 3 significant figures an scientific notation. For example, 0.000023434 is 2.34e QUESTION 4 Approximately how many domains are in an 82.5 kDa protein? O a. 2 O b.3 O C. 4 O d. 1 2.5 QUESTION 5 How long is an a-helix that contains 36 amino acid residues? 6.0 nm 5.4 nm 78 Mostly clody a n Click Save and Submit to save and submit. Click Save All Answers to save all ansuers P Type here to search

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Which of the following is an incorrect characterization for the protein hemoglobin? tetrameric protein globular protein O simple protein O conjugated protein