Name four amino acids that can be synthesized using pyruvate as a starting material. What one(s) of these amino acids can by synthesized by humans and what one(s) cannot?
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Name four amino acids that can be synthesized using pyruvate as a starting material. What one(s) of these amino acids can by synthesized by humans and what one(s) cannot?
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- Alanine, cysteine, glycine, serine, and threonine are amino acids whose breakdown yields pyruvate. Which, if any, of the remaining 15 amino acids also do so?What best describes the relationship between essential amino acids in humans and the number of steps in the amino acid synthesis pathway? a)Generally, the more steps there are in the synthesis pathway, the more likely the amino acid is to be essential. b)There is no relationship between number of steps in the synthesis pathway and whether an amino acid is essential or not. c)All amino acid synthesis pathways are the same length, so all amino acids are equally likely to be essential. d)Generally, the fewer steps there are in the synthesis pathway, the more likely the amino acid is to be essential.Which of the following statements is/are CORRECT? OA) Phosphoenolpyruvate carboxykinase is inhibited by ADP. B) Pyruvate carboxylase is inhibited by ADP. C) Fructose-1,6-bisphosphatase is inhibited by ADP. OD) A and B. OE) B and C. 4
- One example of a stage 2 reaction in the heterotrophic breakdown of food molecules is: the extracellular digestion of amylopectin into glucose monomers the intramitochondrial digestion of fatty acids into carbon dioxide and water the intracellular digestion of glucose monomers into pyruvate the extracellular digestion of triglycerides into fatty acids and glycerol the extracellular digestion of polypeptides into amino acids Identify the three-carbon glycolysis intermediate which can be formed, in the cytoplasm, in one enzymatic step (during deamination of the amino acid alanine)? pyruvate fructose-1,6-bisphosphate fructose glucose-6-phosphate glucoseThe following link carbohydrate metabolism with lipid biosynthesis:(a) How many molecules of glucose are required to provide the carbon forWhat essential amino acid has been called “nature’s Prozac”? What are some of the symptoms seen if deficiencies of it occur?
- Many people who are lactose intolerant can eat yogurt, which is prepared from milk curdled by bacteria, without any digestive problems. Give a reason why this is possible. (Hint: Read the label on each of several yogurt containers. Do the ingredients make a difference?)Maltase is an enzyme that catalyzes the hydrolysis of the disaccharide maltose. This process occurs during human digestion when maltase is secreted by the intestine and then converts maltose into glucose. Which two classes of biomolecules are directly involved in this process?a-Keto acids other than a-ketoglutarate can accept the amino group from pyridoxamine in enzyme-catalyzed transamination reactions. What amino acids are formed when the following a-keto acids accept the amino group?O OO O Opyruvate oxaloacetate
- What metabolic substrate is produced from the carbon atoms of each of the following amino acids?Spell out the full name of the compound. 1) isoleucine 2) asparagine 3) threonine 4) arginineMost aminotransferases use which α-ketoacid as their amino group acceptor? A、α-ketoglutarate B、Pyruvate C、α-ketoglutamate D、alanine E、OxaloacetateHow much ATP and NADPH must be spent to synthesize one molecule of fructose?