BIO 202 Lecture Notes - Lecture 8: Non-Competitive Inhibition, Exergonic Reaction, Competitive Inhibition

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apricotmammoth292

27 Oct 2018

School

Stony Brook University

Department

Biology

Course

BIO 202

Professor

Susan Erster

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Document Summary

The 4 negative changes on the 3 phosphate groups repel each other, raising their potential energy. 3: energy had to be put into building this molecule (relatively unstable phosphoanhydride bonds, all of the oxygens are electrostatic to one another (in image, atp hydrolysis is an endergonic reaction. The delta g of the reaction atp + h2o . Adp + pi is -7. 3 kcal/mol: figure 2: the hydrolysis of atp, atp is hydrolyzed by water to release adp, inorganic phosphate (pi or hopo3 and energy. This hydrolysis reaction releases energy because the reactants, atp and water, have more free energy than do the products, adp and pi. Atp: atp is made from adp and pi. The building up of cell components, muscle contraction, transmission of nerve messages. ) + or direction: such regulatory molecules behave like reversible non-competitive inhibitors, competitive vs. Noncompetitive: competitive inhibitors bind to the active site of an enzyme, competing with the substrate.

Related Questions

1. What is meant by catabolic and anabolic reactions? Give an example of each.

2. Is the DG for an exergonic reaction more than or less than zero? What about an endergonic reaction? In which type of reaction do the products have more energy than the reactants? Why?

3. How do metabolic pathways keep from reaching equilibrium?

4. Describe the components of ATP. What is the purpose of ATP in the cell? How is it recycled?

5. What is meant by the E_A of a reaction? How do enzymes affect the E_A and the DG of a reaction?

6. Describe the cycle of an enzyme as it catalyzes a reaction.

7. How does an enzyme lower the E_A of a reaction?

8. What is the difference between a competitive and a non-competitive inhibitor of an enzyme? Which type of inhibition can be overcome by increasing the substrate concentration? Why?

9. Describe how an allosteric enzyme works.

10. Why is feedback inhibition important in metabolic pathways?

11. Define Energy. What are the different types of Energy?

12. What are the laws of Thermodynamics?

13. Explain redox reactions.

NEED HELP FAST! please answer each question with 2 pargraph

1.What is energy? What are the laws of thermodynamics and what do they describe? What is Gibbs Free energy? What reactions are spontaneous and how come?

2.What is the energy activation barrier? How do enzymes overcome this? Explain why enzymes are substrate specific and how they work. How can enzyme action be inhibited? (mention ALL the factors that can cause an enzyme to fall apart or slow down or not work at all)

Chapters 9 and 10 Respiration and Photosynthesis

Describe each step of cellular respiration with labeled diagrams, including the ATP involved and the general equation. (WORTH TRIPLE POINTS)

emeraldcrocodile909

Which of the following is FALSE with respect to coupledreactions?

	they occur in ALL cells (bacteria, plants, animals, etc.)
	enzymes are typically involved
	endergonic reactions power exergonic reactions
	the coupled reaction has a ?G value that is negative
	none of the above (i.e., all of the above are TRUE)

Which of the following reactions is LEAST likely to bespontaneous? One with a:

	very large increase in entropy and a very large decrease inenthalpy
	very large increase in entropy and a very small increase inenthalpy
	very small decrease in entropy and a very large decrease inenthalpy
	very small increase in entropy and a very small decrease inenthalpy
	very small decrease in entropy and a very small increase inenthalpy

Energy of activation refers to the:

A)	?G of a reaction
B)	difference in energy between the transition state and theproduct
C)	difference in energy between substrate and product
D)	net change in free energy
E)	energy input needed to reach the transition state

Homeostasis refers to maintaining a relatively constantenvironment, and is achieved to a large extent by how enzymes areregulated. For example, when the end product of a pathway regulatesan enzyme that acts early in the same pathway, the effect is mostoften:

	stimulation if an anabolic pathway, and inhibition if acatabolic pathway
	inhibition if an anabolic pathway, and stimulation if acatabolic pathway
	stimulation, whether an anabolic or catabolic pathway
	inhibition, whether an anabolic or catabolic pathway

Enzymes function by:

	decreasing the free energy level of the reactants
	decreasing the free energy level of the transition state
	increasing the free energy level of the reactants
	changing delta G from positive to negative
	changing delta G from negative to positive
	increasing the free energy level of the products
	decreasing the free energy level of the products

6.	When carbohydrates are oxidized, the C

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BIO 202 Lecture Notes - Lecture 8: Non-Competitive Inhibition, Exergonic Reaction, Competitive Inhibition

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