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 proline
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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 0Lactose is a disaccharide formed by the formation of a bond between glucose and glycosidic; lactose glycosidic; galactose hydrogen; sucrose hydrogen; fructose5 pts Question 9 95 58 40 HS HS SH 65 8 M urea and 72 B-mercaptoethanol 65 Hs84 Hs- SH 72 26 HS 110 SH 84 26 110 95 124 40 58 Native ribonuclease Denatured reduced ribonuclease Figure 2.53 Biochemistry, Seventh Edition O 2012 W. H. Freeman and Company The image above shows how Anfinsen unfolded ribonuclease for his classic experiment to see if proteins contain all necessary information for adopting their folded states on their own. To achieve proper refolding and ribonuclease activity, Anfinsen must have: trick question: ribonuclease cannot adopt its folded state without the help of cellular machinery removed the mercaptoethanol followed by the urea very carefully removed both the urea and mercaptoethanol at the same time removed the urea followed by the mercaptoethanol
- Oligopeptide 1 Oligopeptide 2 Give the three-letter and one-letter names of the amino acids in each oligopeptide starting from the amino terminal to the carboxyl terminal. Make sure that the amino acid names are arranged in CORRECT order for both oligopeptides. a.Question 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 FalseAla-Phe-Pro-Cys-Clu-Arg-Arg-Pro-His-Gly-Lys-Clu Calculate the net charge on the polypeptide at a. pH 1.5 b. pH 8 c. pH 13
- 8/30 Next Pick the correct SAR modification: IV. Chain elongation by extra one carbon will increase the activity L Replacement of COOH by tetrazole ring decreases the activity. OH II. Isosteric replacement of N with CH, will decrease the actrvity IIL Removal of Cl will decrease the activity O Type here to search 3r4 617 S DEF GYH1 直P Question 16 Two peptides have almost the exact same primary structure, except that one has about 10 fewer amino acids at the amino-terminus (N-terminus) of the protein. What is a possible explanation for the protein that is missing those 10 amino acids? O A. An alternative Poly-A tail addition site O B. Leaky scanning occurred O .Differential glycosylation of the protein O D. Inefficient folding by chaperone proteins O E. All of the above are correct answersUnanswered Sa polysaccharides 1 Why are humans not able to digest cellulose? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. al Humans do not possess the enzyme necessary to hydrolyze the 1-4-B-glycoside linkages found in cellulose. Humans cannot digest glucose. Humans do not possess the enzyme necessary to unwind the helical shape of the cellulose molecule. P. Humans do not possess the enzyme necessary to oxidize OH groups in cellulose. Unanswered physical preperties 2
- Question 4. If you were to synthesize a tetrapeptide consisting of all alanine residues, you would have how many bonds between carbon and nitrogen?15. Shown here is a 5HT3 receptor protein, what structural motif is exhibited in the alpha domain. Thickness of membraneI lea the - Oligopeptide 2 a. Give the three-letter and one-letter names of the amino acids in each oligopeptide starting from the amino terminal to the carboxyl terminal. Make sure that the amino acid names are arranged in CORRECT order for both oligopeptides. I b. After complete hydrolysis, which oligopeptide will yield more ATP molecules? How many NADH and FADH2 molecules will be theoretically produced? Show all relevant computations for each oligopeptide. Tabulate your answers to keep your answers organized. ( Oligopeptide Net ATP molecules Net NADH produced Net FADH2 produced produced Oligopeptide 1 Oligopeptide 2