Differentiate sweet molecules in Column A using the criteria in column B.
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- Question 5 Match the given choices below with the correct question/ description. Which is known as β-D-glucopyranose? Which is the functional isomer of β-D-glucopyranose? Which is a C-4 epimer of glucose? This test results to a brick-red precipitate This test is used for the detection of pentoses I. Choice B…Question 11 of 13 Among the given statements, which ones are correct about the biological functions and commercial uses of carbohydrates? A. Glucose serves as the substrate for photosynthesis in plants. B. Glycogen serves as repository of glucose in the myocytes. C. The cell wall of plants is reinforced by a polymer of beta-D-glucose. D. Lactose is widely used as filler in tablets and capsules in the pharmaceutical industry. E. Corn extract is commercially hydrolyzed to yield fructose-rich sweetener. Select the correct response: B, C, D, and E A, C, and E B, D, and E B, C, and E O A, B, C, and D O A, B, and CQuestion 4 of 13 A carbohydrate sample reacts positively with all test reagents except for Lugol's. The sample could possibly be? Select the correct response: Lactose Sucrose Cassava root extract Ribose Chicken liver extract
- Question 16 What is the pH indicator in the mannitol salt agar plate? O Bromcresol purple O Kovac's reagent O Phenol red O Neutral red Ouertion 17QUESTION 6 A series of experiments were performed in Neurospora crassa in order to define the tryptophan biosynthesis pathway. In one of these experiments, five tryptophan auxotrophs were isolated and tested for growth on tryptophan and five other known intermediates in the tryptophan biosynthesis pathway. The growth responses are shown below: Growth on Anthranilic Acid (AA) Growth on Indole Growth on Indole Glycerol Phosphate (IGP) Growth on Chorismic Acid (CA) Growth on N- Anthranilate (NA) Growth on Tryptophan Mutants: trp-1 trp-2 + + trp-3 + trp-4 + + + trp-5 + + + - + + + + + + Using the growth data in the above table, indicate the precursor (molecule that you start with) and the order of the intermediates in this pathway (please use exact spelling or abbreviation). Rxnl Rxn2 Rxn3 Rxn5 Tryptophan Rxn4 Indicate the mutant that is associated with the enzyme that catalyzes the reactions for tryptophan biosynthesis using the data given in the above table. Rxn1: Rxn2: Rxn3: Rxn4: Rxn5:Question 4. Sucrose-6-P Glucose-6-P Cytoplasm Cell wall Cell membrane hasC Glucose-1-PUDP-Glucose hasB HA Fructose-6-P➡ Glucosamine-6-P hasA i. UDP UDP-GICUA UDP-GlcNAc Glucosamine-1-PN-Acetyl Glucosamine-1-P Group A Streptococcus (GAS) is a human-specific bacterial pathogen responsible for serious morbidity and mortality worldwide. The hyaluronic acid (HA) capsule of GAS is a major virulence factor, contributing to bloodstream survival through resistance to neutrophil and antimicrobial peptide killing and to in vivo pathogenicity. Genomic studies of GAS have identified genes for hyaluronate synthase (encoded by basA), a membrane-associated enzyme that forms the linear HA polymer by the alternate addition of N-acetylglucosamine and glucuronic acid residues from their respective UDP-sugar precursors. UDP-glucose 6-dehydrogenase (encoded by hasB) forms UDP-glucuronic acid from UDP-glucose in the presence of NAD, while UDP- glucose pyrophosphorylase (glucose-1-phosphate…
- Question 13 Which of the following is the correct structure of the tripeptide Gly-Phe-Ala? a. H-N. Ph H. N. b. HN OH с. H,N. Ph d. OH но Ph NH, O a O b O d * Previous ASSIFICATION OF AMINO ACOS perbes, tis ed on the in chemican VE CLASS CLASSIFI tende nd the LG their co0 useful POLARITY of their R polar, aliphatic R group R group R ter at biological pH, near pH 7.0). ged R group d(basic) Rgroup cidic) Rgroup saov OM HHHINQuestion 8 Among the GAGS, hyaluronate is the only one that is not sulfated. True FalseQuestion 4 of 17 Fill in the blanks: is the active component in Benedict's Reagent is the storage from of carbohydrates in plants is the active component present in Molisch Reagent is the active component present in Mucic Acid Reagent is the active component present in Barfoed's Reagent
- Question 25 Select all the possible non-reducing sugar/s from the list below. CHO CH,OH но HO- но H. HO- OH но но LOCH но HO H. -OH но OH OH H. -OH- ÓHO но II Он ČH,OH II он IV HO OH но CH2OH но но OH но OH CH,OH но V ÓH OH CH,OH VII OH VI II IV %3DQUESTION 30 Select the INCORRECT statement about Glutamate dehydrogenase: O a. Catalyzes the incorporation of NH, 4 into a-ketoglutarate Ob. Catalyzes the removal of NH4 from glutamate Oc Catalyzes the incorporation of NH 4 into a-keto acid Od. Catalyzes the removal of NH 4 into glutamate QUESTION 31 Phosphate buffer is the most important buffer in blood. O True O FalseQUESTION 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