From the complete oxidation of glucose (glucose → 6CO2), how many total nucleotide triphosphates are yielded (be sure to deduct payback) as part of substrate level phosphorylation?
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From the complete oxidation of glucose (glucose → 6CO2), how many total
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- Allosteric Regulation of Ribonucleotide Reductase by ATP and Deoxynucleotides Describe the underlying rationale for the regulatory effects exerted on ribonucleotide reductase by ATP, dATP, dTTP, and dGTP.Figure 27.3 illustrates the response of R (ATP-regenerating) and U (ATP-utilizing) enzymes to energy charge. a. Would hexokinase be an R enzyme or a U enzyme? Would glutamine: PRPP amidotransferase, the second enzyme in purine biosynthesis, be an R enzyme or a U enzyme? b. If energy charge = 0.5: Is the activity of hexokinase high or low? Is ribose-5-P pyrophosphokinase activity high or low? c. If energy charge = 0.95: Is the activity of hexokinase high or low? Is ribose-5-P pyrophosphokinase activity high or low?What is the smallest number of molecules of ATP and GTP consumed in the synthesis of a 200- residue protein, starting from amino acids? Assume that the hydrolysis of PP i is equivalent to the hydrolysis of ATP for this calculation.
- Using the word anomeric carbon, “acceptor” nucleophilic substrate, and activated “donor”, describe how Glycosyl transferase's (and glycosidases) catalyze glycan and glycoconjugate formationDuring fatty acid biosynthesis, is it correct that the product detaches from fatty acid synthase complex when the chain length is 16 carbons?The M and H subunits of lactate dehydrogenase have very similar sizes and shapes but differ in amino acidcomposition. If the only difference between the two were that theH subunit had a glutamic acid in a position where the M subunithad a serine, how would the five isozymes of LDH separate on electrophoresis using a gel at pH 8.6?
- Trypsin, a peptidase that hydrolyzes polypeptides, functions in the small intestine at an optimum pH of 7.7–8.0. How is the rate of a trypsin-catalyzed reaction affected by each of the following conditions?What is the evidence that aspartate transcarbamoylase (ATCase) effects catalysis primarily by proximity? In the figure, what is the role of Lys 84' in the active site- interaction that appear to make with the substrate?Describe the nitrogenase complex. How is the enzymeorganized? What are its unique components?
- Lysozyme is an enzyme that hydrolyzes bacterial cell wall polysaccharides. When this reaction is carried out in the presence of H218O, it is observed that there is retention of configuration at the C1 carbon of the D site sugar as shown below: Would this result suggest that the enzyme mechanism involves the direct nucleophilic attack of water at C1 or that the enzyme mechanism involves attack by a nucleophilic amino acid side chain of the enzyme that generates a transient covalent intermediate?can somone please List the components of the enzyme complex involved in the transition step and Simply describe what does each component does? 1. 2. 3. ect..Hexokinase is an important enzyme in the metabolism of glucose. If theconcentration of hexokinase in our eukaryotic cell is 20 μM, how many glucose molecules are present per hexokinase molecule?