Given the following reaction below, what amino acid is involved and what is the specific reaction that it undergoes? OH Histidine Phosphoamide formation Phenylalanine Tyrosine Phosphodiester bond formation Phosphoester bond formation Phosphomethyl formation Tryptophan O=P-
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- Question 4. Imagine the main chain of a protein bends back on itself so that two amino acid residues R1 and R2 come close to each other. In the table below are four possibilities for what R1 and R2 might be. In each case, decide whether a specific interaction could form between the residues. If a specific interaction could form, give the name of the interaction. R₁ cysteine tyrosine threonine arginine R₂ cysteine phenylalanine glutamine aspartate specific interaction? OO yes O yes O no no OO O yes no yes no name of specific interaction 0 П 0 0Question 1 Amyloid Precursor Protein (APP) is actually thought to be a natural neuroprotective agent induced by neuronal stress or injury. O True O False Question 2 Which of the following is not a property of serine protease? A globular protein with high molecular weight ● It is initially synthesized as a zymogen It has uniquely activated tyrosine residue at the active site Cleaves polypeptide at a specific amino acid residue Question 3 RTK is activated by cyclic AMP. O True FalseQuestion 10 Which of the following statements is incorrect? O In delta notation of fatty acid nomenclature, the numbering starts at the a-carbon from the carboxylic acid end. O Glycerophospholipids are the most abundant lipids in cellular membranes. O Hormones, such as testosterone, estradiol and progesterone are examples of steroidal lipids. O The rigidity of a saturated fatty acid is based on the strong bonding between sp3-hybridized carbon chains.
- Question 9 Choose the CORRECT statement. O A polypeptide chain may have abrupt changes in direction and restriction in geometry because of the presence of glycine O A polypeptide chain may have abrupt changes in direction and restriction in geometry because of the presence of valine O A polypeptide chain may have abrupt changes in direction and restriction in geometry because of the presence of arginine O A polypeptide chain may have abrupt changes in direction and restriction in geometry because of the presence of prolineQUESTION 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 primaryQUESTION 26 The best description of a glycoprotein is only amino acids polymerized in a chain amino acid chains with covalently bound heme groups O amino acid chains and bound carbohydrate O a protein with a covalently bound lipid Oa polysaccharide with a fatty acid modification
- Question 6 What conformation of B subunits contributes to form ATP? F1 conformation O open conformation loose conformation tight conformation O conformationQuestion 1Predicting Secondary Structure Which of the following peptides is more likely to take up an -helical structure, and why? (a) LKAENDEAARAMSEA (b) CRAGGFPWDQPGTSNQUESTION 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 10 Which one of the following statements does NOT correctly describe the current state of the chymotrypsin-substrate complex below or the next mechanistic step that occurs? s,' G193 S195 NH NH R -NH R-NH HN- Ser-195 His-57 HN Asp-102 OA. This intermediate is part of a nucleophilic acyl substitution reaction. OB. In the next step His-57 protonates Ser-195. O C. In the next step His-57 activates a water molecule. O D. In the next step His-57 protonates the leaving group. OE. In the next step the N-terminal fragment of the original substrate departs.QUESTION 13 Investigating how protein subunits come together studies: super- secondary structure quaternary structure primary structure tertiary structure QUESTION 14 If the substrate for an enzyme catalyzed reaction contained a negative charge, which of the following amino acids would most likely be present in the active site to provide electrostatic destabilization of the ES complex? Leu Val O ASP O LyS 787 Mostly cloudy Click Save and Submit to save and submit. Click Save All Ansuers to save all answers. 立QUESTION 28 Which amino acid is most likely to break an alpha helix? Alanine Isoleucine none of the choices are correct Proline QUESTION 29 If an enzyme has a kcat = 3.3e's-1, Km = 5.9e M, what is its catalytic efficiency? Give your answer in 2 significant figures and scientific notation QUESTION 30 To determine the molecular weight of a purified protein you subject it to ESI mass spectrometry at pH=2. The spectrum i t aiahbeni aln hain m tian Click Save and Submit to save and submit. Click Save All Answers to save all ansuers. 786 Mostly cloudy 9 Type here to search