urses / MEDBAS145en 21-22Spring / 2021-2022 Spring Semester / FinalWhich of the following pairs depict the absolute specificity of the enzyme?Select one:OOOOa. All of themb. Hexokinase - Glucosec. Lactase - Lactosed. Lipase - Triacylglycerol

Enzymes are specific in their action. Some enzymes are group specific, whereas others exhibit…

Answered: Which of the following pairs depict the…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Choose the best answers for each missing word from the list below. ____ regulated by ATP, Aspartate transcarbamoylase (ATCase) is (1) which is a (2)________________ regulator, and by CTP which binds to the (3)____ subunit of ATCase and shifts the conformational equilibrium to the (4). T state. CTP regulation of ATCase is called (5)________ 1) allosterically, 2) positive, 3) regulatory, 4) inactive, 5) feedback inhibition 1) covalently 2) positive, 3) regulatory, 4) active, 5) feedback inhibition 1) allosterically, 2) negative, 3) regulatory, 4) inactive, 5) feedforward activation 1) allosterically, 2) negative, 3) catalytic, 4) active, 5) feedforward inhibition 1) irreversibly, 2) positive, 3) catalytic, 4) inactive, 5) feedback inhihition
Choose the correct letter of the answer for all questions
The following question focuses on how the parameters regulating enzyme function might change, and how these might appear graphically on a Michaelis-Menten plot and a Lineweaver-Burke plot. Carbonic anhydrase is an enzyme that will convert CO2 and water into HCO3. CO2 + H20 > H+ + HCO3 There are many different isoforms of this enzyme. (see for instance http://en.wikipedia.org/wiki/Carbonic_anhydrase 1 Assume that one variant has a Km of 10 µM and a different variant has a Km of 100 µM. Draw on the same graph a typical Michaelis-Menton plot showing the alteration in the rate of carbonic anhydrase as the CO2 level is varied for the two different variants of enzyme, assuming the concentration of the enzyme (10 mM) in the test tube is kept constant. Assume that you have equal amounts of the two different variants of carbonic anhydrase in a number of test tubes and that the Vmax for both enzymes are the same. Be sure to label the axes. For the same conditions as above, draw a…
Which of the following could act as one of the substrates in a reaction catalyzed by a glycosyltransferase? Choose one or more: A. GalNAc ☐ B. galactose C. UDP-GalNAc D. GDP-Mannose
All of the following classes of enzymes catalyze the Fatty acid synthesis except a. synthetase b. Synthase c. Carboxylase d. Dehydrgen
Identify how many glucose molecules will be produced from the amount of 15 G3Ps. (with solution)
Write a pathway leading from glucose to lactose in mammary gland, and write a balanced equation for the overall pathway.
Write a pathway leading from glucose to lactose in mammary gland, and write a balanced equation for the overall pathway.
CHOOSE 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.
It makes sense that enzymes should be active when they are needed and inactive when they are not needed. Non-competitive (allosteric) regulation of enzymes is important in metabolism because it allows for the rapid adjustment of their activity. Recall hexokinase, a key enzyme of glycolysis. Which of the following molecules likely functions as an allosteric inhibitor of its activity? A. ADP B. Glucose C. NAD+ D. Pyruvate
Which of the following can be used to treat phenylketonuria? Select one: O a. frequent administrations of phenylalanine hydroxylase enzyme O b. Neither A or B C. • both A and B O d. a diet rich in phenylalanine-rich protein. Clear my choice
A medical student was studying the effect of glucose oxidase on glucose and fructose metabolism. He noticed the affect only with the glucose and no effect with fructose. Which ONE of the following property would explain his Indings? DStereo or optical specificity OBond specificity OAbsolute specificity OReaction specificity Group specificity

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Which of the following pairs depict the absolute specificity of the enzyme Select one: a. All of them O b. Hexokinase - Glucose O c. Lactase - Lactose d. Lipase - Triacylglycerol