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- Question 6 All of the following are parts of the honeybee's processing of honey EXCEPT: O producing a small amount of gluconic acid. O concentrating the sugars to a supersaturated state. conversion of some glucose and fructose into sucrose. conversion of most of the fructose to the B-D-fructopyranose form.Question 10 Observe this structure, use the pK, table, and choose the CORRECT statement. H2N-CH-C-OH CH2 OH O Tyrosine's side chain is involved in hydrogen bonding typical of secondary structures O Tyrosine's alpha carboxyl group is the most acid of the three dissociable groups O Tyrosine's side chain is partially dissociated at physiological pH O All of these are correctQuestion 10 The reaction in which a disaccharide is broken down into its component monosaccharides is enediol formation. O hydrolysis. glycoside formation. oxidation. reduction.
- When a purine or a pyrimidine is linked through a β-N-glycosidic link to C-1 of a pentose, the molecule is called a _____________ .QUESTION 33 Bonus: An a-D-aldopentofuranose has how many chiral carbonsQUESTION 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
- why glutamate is the most soluble in water at pH7Question 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 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 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 3. Dihydrofolate reductase (DHFR) is capable of making one carbon moieties of various oxidation states (i.e., methanol, formaldehyde, formate). Folic acid, a B vitamin, provides the critical chemistry: R. This type of chemistry is utilized in the synthesis of nucleotides. Methotrexate has a significantly higher affinity (Kd - 50 pM) than folate for the enzyme and is used in cancer therapy to suppress DNA synthesis of rapidly dividing cancer cells. What is a tempting reason for methotrexate having such high affinity?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