Lab Exercise 10C, the purpose of adding NaCl (table salt) to Pizza Dough is to: a. catalyze oxidation of fatty acids to lactic acid b. carry H2 reducing equivalents during the baking process c. hydrolyze alcohol so that it does not accumulate in the dough d. tighten cross-linkages in the gluten matrix making the dough more elastic and chewy e. control how fast yeast cells produce CO2 during the leavening process
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Lab Exercise 10C, the purpose of adding NaCl (table salt) to Pizza Dough is to:
a. catalyze oxidation of fatty acids to lactic acid
b. carry H2 reducing equivalents during the baking process
c. hydrolyze alcohol so that it does not accumulate in the dough
d. tighten cross-linkages in the gluten matrix making the dough more elastic and chewy
e. control how fast yeast cells produce CO2 during the leavening process
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- Remember for T/F questions, either answer TRUE or FALSE, but if the answer is FALSE make sure to explain WHY the answer is false. Reactions that are energetically unfavorable can proceed on their own.. E 1 B U I x² 8- % SS A X₂ QiLearn Video FfPractice Performance Task: Cellulase PRACTICE PERFOR K Both humans and cows are able to consume plant matter made up of complex carbolydrates, such as starch or cellulose. However, a cow's digestive system is very different from that of a human. As a result, humans and cows differ in their ability to extract nutrients from plant-based food resources For example, unlike humans, vows can thrive on grass, which is largely made up of cellulose Cows are able to digest grass thanks to a complex community of microbes, inchading bacteria, in their digestive system. These bacteria prodoce cellulase, which starts the process of breaking down cellulose into smaller sobbunits of ghacose. Cows then acquire energy as the microbes in their digestive system utilize the glucose to carry out fermentation. A by-product of fermentation by bacteria is methane gas (CH,) 1. A student is working on drawing and labeling a very basic model showing how cellulose is broken down. The students work on the model so…National Board of Medical Examiners Biochemistry Mark 36. In the presence of a metabolite (X), 6-phosphofructokinase is assayed at a fixed concentration of ATP and varying concentrations of fructose 6-phosphate. The resulting data are shown in the table. Fructose 6-phosphate (pM) 5 10 20 40 75 100 200 Velocity umoles/min 0.05 0.15 0.25 0.70 1.7 2.2 3.1 3.1 Velocity (+X) umoles/min 0.006 0.025 0. 10 0.35 1.03 16 2.9 3.1 400 Metabolite (X) is most likely which of the following substances? O A) ADP O B) AMP OC) CAMP D) Citric acid O E) Fructose-2,6-bisphosphate
- Situational Problems 1. With the prevalence in food of peeled cereals or bread made from high-grade flour, hypovitaminosis B1 may occur. Explain the role that vitamin B, plays in the body. For this: a) name the coenzyme which contains vitamin B, and enzymes, which require this coenzyme to function; b) write the process in which these enzymes are involved and explain how the process speed will change with a lack of B,; d) what discase develops in the absence of vitamin B,.Work 4. Enzymes of the gastrointestinal tract. Fill in the table indicating the enzyme, the place of secretion, activation factors, substances which are its substrate (on which it acts) and hydrolysis products. Pepsins are given as an example of filling the table. Table 10 Enzymes of the gastrointestinal tract ENZYME PLACE OF АСTIVATION SUBSTRATE PRODUCTS SECRETION FACTORS Saliva a-amylase Pepsinogens Trypsinogen Chymotrypsinogen |Carboxypeptidase A Lipase Pancreatic a-amylase Stomach HCI Proteins Peptones Ribonuclease Enteropeptidase (enterokinase)Activity 1: Practice Problems 1. In humans, phenylketonuria (PKU) is a disease caused by an enzyme deficiency at step A in the following simplified reaction sequence, and alkaptonuria (AKU) is due to an enzyme deficiency in one of the steps summarized as step B: A B phenylalanine tyrosine CO₂ + H₂O A person with PKU marries a person with AKU. What phenotypes do you expect for their children? wildtype O PKU O AKU O Both PKU and AKU
- topic: ISOLATION AND CHARACTERIZATION OF CARBOHYDRATES 1. Erythrose is an aldoterose. Describe the result when it is subjected to each of the following tests:a. Molisch’s Testb. Barfoed’s Testc. Benedict’s Testd. Seliwanoff’s Test2. Illustrate the reaction and identify the principle involved in the Nelson test.III. Problem solving. Show your computations. Answer questions briefly. A 50.0 ml juice extract is colorimetrically assayed using Nelson's test. One milliliter (1.00 mL) of the solution and the standard glucose solution (concentration: 1mg/mL) were treated with freshly prepared Nelson's reagent and arsenomolybdate reagent and then diluted to 10.0 mL separately in properly labeled test tubes. Absorbance at 480 nm for the standard is 1.702 and for the sample, 0.926. A. What is the principle behind the assay?Instructions: PART 1. Provide substantive brief descriptions to each of the following as required. Identify the letter of the best possible answer and justify. 1. Disaccharidases are enzymes found in the small intestine that participate in degradation of disaccharides. Which of the following molecules can be broken down by these enzymes? A. Fructose B. Sucrose C. Glucose D. Cellulose 2. What type of process is occurring as carbohydrates are broken down to carbon dioxide? A. Elimination B. Oxidation C. Reduction D. Substitution 3. Some low-carb and high-protein diets particularly those that severely restrict carbohydrate consumption but allow a dieter to eat foods high in saturated fat - may contribute to which of the following health problems? A. Heart disease D. Kidney damage B. Cancer E. All of the above C. Constipation 4. Which of the following statements is true concerning glucose polymers? A. Starch is a glucose polymer held together by an α-(1,6) linkage. B. Humans do not eat…
- m BIO101 Short EXAM First session X G Google om/moodle/mod/quiz/attempt.php?attempt%3D1313727&cmid%3D298536 e on the bookmarks bar. Import bookmarks now... AL BIOLOGY I/ ill courses GENERAL BIOLOGY I BIO101 Short EXAM First sess Time left 0:21:42 If an enzyme in solution is saturated with its substrate, the most effective way to obtain a higher reaction rate is to: O a. add more substrate O b. heat the solution to 95°C O c. add more of the enzyme O d. All of the options are correct O e. add a noncompetitive inhibitor Next page vity Jump to.. ents 51°F Light rairExercise 1. Write down the definition: "Flavonoids" -Course : BiochemistryChapter : Amino acid metabolism Ammonia obtained from N2 will be used by plants to form other carbon compound amino acids.The process of assimilation of ammonia into larger molecules generally uses two compounds, namely glutamine and glutamate. -Explain the two reactions above!-Explain also the reaction of the assimilation of ammonia to amino acids!