True or False. Write the word “reducing” if the statement is correct, otherwise write “non-reducing”.
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True or False. Write the word “reducing” if the statement is correct, otherwise write “non-reducing”.
![_7] Salivary amylase can be use to hydrolyze B1,4 glycosidic
bonds of cellulose.
_8] Lobry de Bruyn-van Ekenstein Transformation take place when a
sugar is treated with a strongly basic reagent.
9] Ribulose yields 5-hydroxymethylfurfural upon treatment with
strong acid.
_10] Galactose gives a positive result with Benedict's test faster than
lactose due to the acidity of the reagent used.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F80101996-1698-4c40-8ebf-c59495691253%2F7a737a5f-75ac-4555-b1d5-9465b2780c67%2F6qgq8b8_processed.png&w=3840&q=75)
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- When a nonapeptide undergoes partial hydrolysis, it forms dipeptides, a tripeptide and two tetrapeptideswhose amino acid compositions are shown. Reaction of the intact nonapeptide with Edman’s reagentreleases PTH-Leu. What is the sequence of the nonapeptide?1. Pro, Ser 3. Met, Ala, Leu 5. Glu, Ser, Val, Pro 7. Met, Leu2. Gly, Glu 4. Gly, Ala 6. Glu, Pro, Gly 8. His, ValThe following are known substrates for ALP (Alkaline Phosphotase); nucleotide tri, di and monophosphate, deoxynucleotides, phosphoglycerate, 2-naphthyl phosphate, 4-nitrophenyl phosphate, cysteamine S-phosphate, fructose-6-phosphate, fructose-1-phosphate, glucose-6-phosphate, phosphoserine, phosphothreonine, pyridoxyl phosphate, pyrophosphate. From looking at the structure can you offer an explanation for how ALP can accommodate such different substrates?One sample of the globular protein peroxidase is hydrolyzed by heating with 6 M HC1. A second sample is denatured by treatment with acetone. a) How does the peroxidase structure change during hydrolysis? Will this change the biological activity of peroxidase? b) How does the peroxidase structure change during denatur-ation? Will this change the biological activity of perox-idase? c) Are either of these processes likely to be reversible?
- Instead of Molisch's test, what specific test can be used to detect the presence of pentose sugar?Which of the following is an aldo-tetrose ? * НО H НО Н OH Н OH OH CH2OH (a) (d) H Н НО H A B D OE н -ОН -ОН CH₂OH c=0 н -OH CH₂OH (b) (e) н НО НО H- CH₂OH c=0 -H H OH CH₂OH (c) H Н CH₂OH Т c=0 OH OH CH2OHBelow is an extract which describes the mechanism of action of aldolase during the cleavage of fructose 1, 6-bisphosphate to produce dihydroxyacetone phosphate (DHAP) and glyceraldehyde 3-phosphate (GAP). Fill in the missing words to complete the extract. Listed here is the pool of words to select from: abstracts, acidic, amine, covalent, hydroxyl, lysine, nitrogen, Schiff base, tetrahedral, water. Ring opening of F1,6BP occurs to render a linear sugar bisphosphate molecule.A __________ residue attacks the carbonyl carbon of F1,6BP. As the carbonyl Oxygen gets a negative charge, a proton is abstracted from the active site _________ amino acid. A _________ intermediate is produced. The active site basic amino acid residue _________ a proton from the lysine. A carbon- __________ double bond forms, producing a protonated Schiff base. At the same time, a solvent proton combines with the released hydroxyl group from C2 to form ________ and leaves the active site. The second active site…
- An octapeptide was hydrolyzed and the amino acids separated. Its amino acid composition was determined: Gly (1); Ala (2); Val (1); Lys (2); Met (1); Asp (1). After incubation with FDNB and hydrolysis, 2,4-dinitrophenylalanine was detected. NO2 H H N C COOH ON- CH, Treatment with cyanogen bromide, which cleaves at M, resulted in two fragments: a pentapeptide containing two K residues and a tripeptide containing V, G, and A. The residues are not listed in any particular order. After treatment with trypsin, which cleaves at R and K, there were three fragments: two dipeptides and MGAV. What is the sequence of the octapeptide? Use the one-letter abbreviations for the amino acids, and do not use dashes.Draw the products formed when -D-idose is treated with C6H5NHNH2 (excess), H+Which of the following is a non-reducing sugar? 2,3-di-O-methyl B-D-galactopyranoside 2-0-methyl-a-D-mannopyranoside Fructose 1-0-methyl-ß-D-glucopyranoside dextrin
- What are the glycosidic linkages of the trisaccharide shown? α1→6, α1→6 α1→6, β1→6 α1→6, β1→5 α1→6, α1→5A certain plant storage protein, after being isolated, was digested using both 8N H2SO4 and conc. Ba(OH)2. The resulting hydrolysates were then analyzed for amino acid composition using paper chromatography with EtOH-NH3-H2O (80:10:10) as the solvent system and ninhydrin as the visualizing agent. Name the amino acids found in the acid hydrolysate labelled 1-5.Use the two Fischer projections shown below to draw the Haworth projection of these two sugars linked by an a(1-2) linkage, with the ß isoform of the ketohexose. H H ㅎ HO H H OH OH ОН Н НО CH₂OH 애,애애 OH CH₂OH OH H OH OH OH I OH CH₂OH OH OH OH Eng са CH2OH CH2OH OH OH ОН ОН CH₂OH Н OH Н Н OH Н T I CH₂OH CH₂OH OH OH OH CH₂OH CH₂OH Н CH₂OH CH₂OH ОН OH OH НО OH H Н OH CH₂OH