G) and biochemical standard change in free energy (delta Gº) with the spontaneity of a given reaction in a living cell? Review of Enzyme Function and Regulation Q1.2-Name three processes affecting enzyme bioavailability and a mechanisms controlling catalytic efficiency. Plants Harvest Energy from the Sun 013 How do eukaryotic plants obtain energy at night to maintain

G) and biochemical standard change in free energy (delta Gº) with the spontaneity of a given reaction in a living cell? Review of Enzyme Function and Regulation Q1.2-Name three processes affecting enzyme bioavailability and a mechanisms controlling catalytic efficiency. Plants Harvest Energy from the Sun 013 How do eukaryotic plants obtain energy at night to maintain

Biochemistry

6th Edition

ISBN:9781305577206

Author:Reginald H. Garrett, Charles M. Grisham

Publisher:Reginald H. Garrett, Charles M. Grisham

Chapter17: Metabolism: An Overview

Section: Chapter Questions

Problem 8P: How Is Metabolism Regulated? (Integrates with Chapter 15.) Metabolic regulation is achieved via...

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BIOC 384 Overview of Metabolism Q8.4: Use bioenergetics to explain why eating a bowl of Frosted Flakes cereal leads to a highly favorable change in free energy, which drives the production of glucose-6P in the reaction catalyzed by the enzyme hexokinase under conditions where temperature and enzyme concentration do not change.
BIOC 384 Regulation of Enzyme Activity Q7.1: Describe how ATP and CTP regulate ATCase enzyme activity and why these two effectors are considered heterotropic allosteric effectors.
Briefl y discuss the function of glycolysis in bioenergetics. What role does NAD+ play in glycolysis?
biochemistry question, please show all work! As the result of a storm while on a three-hour boat tour, you have found yourself on an uncharted island with several other people. The (additional) bad news is that you and your fellow castaways have become infected with a previously unknown, lethally pathogenic organism, P. Fortunately, however, you have discovered a biochemistry laboratory on the island, and you begin to study the organism. In Organism P, the ATP synthase enzyme complex can synthesize ATP using a proton gradient, and can use ATP hydrolysis to generate a proton gradient. For Organism P you measure: pHinside = 8.5, pHoutside = 7.3, and membrane potential = –110 mV.a. Assumingthatthebacteriumisaspherewithadiameterof2.34μm,howmany “free protons” are present in the cell?b. Assuming [ATP] = 5 mM, [ADP] = 1 mM, and [Pi] = 2 mM, and the cellular temperature is 25°C, what is the minimum number of protons that must enter the cell to yield enough energy to synthesize an ATP from an…
When enzyme solutions are heated, there is a progessive loss of catalytic activty over time due to denaturation of the enzyme. A solution of the enzyme hexokinase incubated at 45 degrees Celsius lost 50% of its activity in 12 minutes, but when incubated at 45 degrees Celsius in the presence of a very large concentration of one of its substrates, it lost only 3% of its activity in 12 minutes. Suggest why thermal denaturation of hexokinase was retarded in the presence of one substrates.
Introduction: (4 pts) (Answer questions in paragraph form - 300 words max) What are enzymes and what do they do? What are the optimal conditions for an enzyme? What factors affect enzyme activity and how? How is the structure of an enzyme related to its function? What is amylase? What reaction does it catalyze? Research the amylase enzyme you used (organism) and the optimal conditions of temperature, pH, or salt, it requires. Explain why DNS is used and why it is important for determining enzyme activity. Cite and reference your sources using APA style.
When enzyme solutions are heated, there is a progressive loss of catalytic activity over time due to denaturation of the enzyme. A solution of the enzyme hexokinase incubated at 450C lost 50% of its activity in 12 minutes, but when incubated at 450C in the presence of a very large concentration of one of its substrates, it lost only 3% of its activity in 12 minutes. Suggest why thermal denaturation of hexokinase was retarded in the presence of one substrates
The mechanism of chymotrypsin is used as a model for studying enzyme reaction mechanisms. Answer the following questions related to chymotrypsin: 1. List the 3 amino acids in the catalytic triad of chymotrypsin. 2. List the types of catalytic mechanisms (from the 3 main types of catalytic mechanisms) displayed in the mechanism of chymotrypsin.
2c which is altered by a catalyst such as an enzyme, the net free energy change of the reaction or the activation energy of the reaction?
The Michaelis‑Menten equation models the hyperbolic relationship between [S] and the initial reaction rate ?0V0 for an enzyme‑catalyzed, single‑substrate reaction E+S↽−−⇀ES⟶E+PE+S↽−−⇀ES⟶E+P. The model can be more readily understood when comparing three conditions: [S]<<?m[S]<<Km, [S]=?m[S]=Km, and [S]>>?m[S]>>Km. Match each statement with the condition that it describes. Note that "rate" refers to initial velocity ?0V0 where steady state conditions are assumed. [Etotal][Etotal] refers to the total enzyme concentration and [Efree][Efree] refers to the concentration of free enzyme.
56. ONE OF THE FOLLOWING IS NOT A GENERAL STAGE IN THE BIOCHEMICAL ENERGY PRODUCTION? A. CITRIC ACID CYCLE B. DIGESTION C. ABSORPTION D. ELECTRON TRANSPORT CHAIN E. ACETYL GROUP FORMATION 57. A STAGE WHERE NADH AND FADH2 ARE OXIDIZED TO RELEASE H+ AND ELECTRONS? A. CITRIC ACID CYCLE B. DIGESTION C. ABSORPTION D. ELECTRON TRANSPORT CHAIN E. ACETYL GROUP FORMATION 58. SMALL MOLECULES FROM DIGESTION AND ABSORPTION ARE FURTHER OXIDIZED TO FORM THIS STAGE OF THE METABOLIC PATHWAY? A. CITRIC ACID CYCLE B. DIGESTION C. ABSORPTION D. ELECTRON TRANSPORT CHAIN E. ACETYL GROUP FORMATION
A7. Consider what can be concluded about the catalytic site (substrate binding site) of phosphatase and the binding site of NaF from the type of inhibition shown by NaF for phosphatase and illustrate it schematically. The inhibition typre is pure noncompetitive inhibition.