Biochemistry
6th Edition
ISBN: 9781305577206
Author: Reginald H. Garrett, Charles M. Grisham
Publisher: Cengage Learning
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Chapter 26, Problem 20P
Interpretation Introduction
Interpretation:
About the carbon atoms in which glucose would be most likely to end up as the 5-CH3 carbon in dTMP.
Concept introduction:
Folate, vitamin B12 and vitamin B6 and one carbon
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Indicate whether each of the following disaccharides is a reducing (R) or nonreducing (NR) sugar by the criterion of reaction with Fehling’s solution.
(a) Glcα(1 → 2)Frucβ
(b) Galβ(1 → 4)Glc
(c) Glcα(1 → 1)Glcα
(d) Glcα(1 → 4)Glc
(e) Glcβ(1 → 6)Glc
With alanine AA, and using citric acid cycee and glycolysis, which Carbon atom would be labeled 1st with 14C n succinate? Why?
Why does the OH group add to the b-carbon rather than to the a-carbon in the second reaction in theb-oxidation of fats? (Hint: See Section 16.15.)
Chapter 26 Solutions
Biochemistry
Ch. 26 - Prob. 1PCh. 26 - Prob. 2PCh. 26 - Allosteric Regulation of Purine and Pyrimidine...Ch. 26 - Inhibition of Purine and Pyrimidine Metabolism by...Ch. 26 - Prob. 5PCh. 26 - Allosteric Regulation of Ribonucleotide Reductase...Ch. 26 - Prob. 7PCh. 26 - Prob. 8PCh. 26 - Prob. 9PCh. 26 - Prob. 10P
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- The oxidation of 1 mol of glucose supplies enough metabolic energy to form 36 mol of ATP. Oxidation of 1 mol of a typical dietary fat like tristearin (C57H116O6) yields enough energy toform 458 mol of ATP. How many molecules of ATP can form per gram of (a) glucose; (b) tristearin?arrow_forwarddraw all the structures of the tribasic amino acid lysine involved in the equilibrium reactions that would take place during titration against NaOH, starting with the fully protonated form below (draw the R-group in full). H;N+- CH - COOH (CH2)4 NH3+arrow_forwardStrictly speaking, "Hydrates of Carbon" pertains to the specific chemical formula of most Carbohydrates which is (CH2O)n. In this regard, what instances can be identified where in this chemical formula has exemptions? a.Lactate which is considered a non-sugar following the formula. b.Acetate which a non-sugar being considered as a sugar molecule. c.Rhamnose being a 5 carbon sugar molecule. d.Lactose in its form and configuration.arrow_forward
- draw disaccharide as Haworth projection: (shown in image) -is this drawing a reducing sugar? Briefly explainarrow_forwardDraw the structure before the product of glucose react further, how does oxidation occur in glucose? Please draw and explainarrow_forwardDraw the tripeptide gly-glu-phe with all ionizable groups in their predominant state at pH 7.0.arrow_forward
- Indicate whether each of the following monosaccharides would be classified as an aldose, ketose, triose, tetrose, pentose, or hexose (each can be classified into two different categories). Which of these sugars would exist predominantly in the cyclic form?arrow_forwardIn observing a Haworth or cyclohexane-chair representation of alpha-d-glucopyranose, the anomeric carbon can de best identified by: a) the carbon atom which is bonded to the most H atoms b) the carbon atom which is bonded to the least H atoms c) The carbon atom which has its OH group pointing down d) The carbon atom which is bonded to two oxygen atoms Cellulose differs from amylose in that: a) cellulose has 1-6 branches while amylose does not b) amylose has 1-6 branches while cellulose does not c) amylose has alpha glycosidic bonds while cellulose has beta glycosidic bonds d) cellulose contains sulfate while amylose does not. The glycosaminoglycan (mucopolysaccharide) which is not normally associated with joint tissue is: a) heparin b) keratan sulfate c) chondroitin sulfate d) hyaluronic acid In glycoproteins, which amino acid does not bond sugar molecules? a) Asn b) Ser c) Thr d) Gly Which feature do all lipid molecules share in common? a) fatty acid molecules…arrow_forwardThe isoelectric point (pI) of 6-phosphogluconate dehydrogenase is 6.0. Explain why the buffer used in DEAE cellulose chromatography must have a pH greater than 6 but less than 9 in order for the enzyme to bind to the DEAE resin.arrow_forward
- Write the names of the above molecules (A and B respectivley) ,If the 5’OH group was phosphorylated with triphosphate, what would the names then be (provide the full names of each)?arrow_forwardA reducing sugar will undergo the Fehling reaction, which requires a(potential) free aldehyde group. Which of the disaccharides shown inFigure are reducing and which are nonreducing?arrow_forwardDraw the (B1-->A1) linked dissacharide formed between the C3 epimer of B-D-glucose and the C2 epimer of a-D-galactose. Explain in 1-2 sentences why (or why not) a precipiate would be observed when mixing this dissacharide in an alkaline solution of copper.arrow_forward
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