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Concept explainers
(a)
Interpretation: Among the given pair of molecules, the member which is encountered first in the biosynthetic pathway that produces active Vitamin
Concept introduction: The most important forms of Vitamin D are Vitamin
(b)
Interpretation: Among the given pair of molecules, the member which is encountered first in the biosynthetic pathway that produces active Vitamin
Concept introduction: The most important forms of Vitamin D are Vitamin
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Chapter 21 Solutions
EBK GENERAL, ORGANIC, AND BIOLOGICAL CH
- Fill in the blanks and explain the relationship between the paired words/phrases a. methotrexate: dihydrofolate reductase; ___________: thymidylate synthase b. __________: aspartate; purine: glycinearrow_forwardOrder the steps that results in a triacylglycerol containing two palmitic acids and one stearic acid. a. Diacylglycerol reacts with an fatty-acyl-CoA b. Phosphate is remove from phosphatidic acid to form diacylglycerol c. Two of the fatty acyl-CoAs react with glycerol-3-phosphate d. An elongase produce stearic acid e. Stearoyl-CoA is synthesized…arrow_forwardGive two reasons why people may not want to take supplements that contain beta-carotene or vitamin E.arrow_forward
- Answer the following questions about the given triacylglycerol. What fatty acids are used to form this triacylglycerol? a. lauric acid, stearic acid, lauric acid b. palmitic acid, myristic acid, stearic acid c. myristic acid, lauric acid, stearic acid d. arachidic acid, stearic acid, lauric acid Answer the following questions about the given triacylglycerol. Would you expect this triacylglycerol to be a solid at room temperature? yes or noarrow_forwardMatch the enzyme to the reaction catalysed. Not all the enzymes have to be selected, and an enzyme may be used more than once. v Synthesizes phosphatidic acid A. Glycerol-3-phosphate dehydrogenase v Synthesizes triacylglycerol B. Glycerol kinase v Synthesizes acetoacetyl-CoA C. Acyl-CoA cholesterol acyl transferase v Synthesizes mevalonate D. Lipin v Synthesize 1,2 diacylglycerol E. Acyl transferase v Converts glycerol into glycerol-3-phosphate F. HMG-CoA reductase v Converts dihydroxyacetone phosphate into glycerol-3-phosphate G. Thiolase v Synthesize cholesterol-esterarrow_forwardName the following enzymes:a. enzyme responsible for the cutting of the sugar on the nonreducing ends of glycogen branches b. enzyme that is only present in the liver and kidney during glycogen utilization c. enzyme that catalyzes the transfer of a two-carbon fragment from a ketose donor to an aldose acceptor in PPParrow_forward
- By looking into the triacylglycerides synthesis pathway, suggest a possible treatment for fat loss/weight reduction. Discuss any possible complications that might occur from using your treatment.arrow_forwardCHOOSE THE CORRECT LETTER When glycogen is synthesized in both the liver and muscle, all the following are true, EXCEPT A.Glucose is transferred from UDP-glucose to a growing glycogen molecule by glycogen synthase.B. Phosphoglucomutase converts glucose 6-phosphate to glucose 1-phosphateC. Glucose 6-phosphate is converted to glucose by a phosphatase.D.Glucose 1-phosphate is activated by UDP-glucose pyrophosphorylase to produce UDP-glucose and PPi.arrow_forwardThe characteristics of vitamin P include the followings except: Select one: a. Vitamin P acts synergistically with ascorbic acid b. It reduces the level of hyaluronidase which prevents the oxidation of ascorbic acid and adrenaline, as result it increases the strength of the blood vessels and capillaries c. It increases the capillary fragility and their permeability d. It is related to flavonoids and phenolic compoundsarrow_forward
- Differentiate fatty acid synthesis and degradation in terms of the following: Fatty acid synthesis Fatty acid degradation a. Subcellular location b. End product c. Co-factors d. Carriers of acyl/acetyl groups between the mitochondria and the cytosolarrow_forwardList the classification of fatty acids based on their chemical structures, as well as their synthesis and acquisition from natural food sources. Discuss how they are classified in this manner.arrow_forwardIndicate which of the following amino acids are ketogenic and which are glucogenic: a. tyrosine b. lysine c. glycine d. alanine e. valine f. threoninearrow_forward
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