- How does changing temperature affect the rate of anenzyme-controlled chemical reaction? Why?
12. How does the changing of pH affectthe rate of an enzyme-controlled chemical reaction?
- How fast do enzymes act?
Energy
To review the following concepts, use the masteringbiowebsite, Chapter 8. Don
- How does changing temperature affect the rate of anenzyme-controlled chemical reaction? Why?
12. How does the changing of pH affectthe rate of an enzyme-controlled chemical reaction?
- How fast do enzymes act?
Energy
To review the following concepts, use the masteringbiowebsite, Chapter 8. Don
Related textbook solutions
Related questions
1. Energy ______
cannot be produced by fungi and heterotrophicorganisms. | |
involves ATP in living organisms. | |
is the ability to do work. | |
usage is governed by the laws of thermodynamics. | |
all of these |
2. Enzymes, which are usually _______, increase the rate of areaction by ______.
steroids; increasing the temperature of the substrates | |
carbohydrates; contributing electrons to the reaction | |
proteins; decreasing activation energy | |
lipids; changing the pH of the substrates |
3. Why is adenosine triphosphate (ATP) important in cells?
It accelerates diffusion. | |
It stores energy in an easily accessible form that can be usedto do work. | |
It is assembled into long chains that make up cellmembranes. | |
It acts as an enzyme speeding up chemical reactions. |
4. Why are enzymes important to humans?
Because they can evade the laws of thermodynamics. | |
Because they are proteins. | |
Because they allow reactions to occur at body temperature. | |
Because they increase body temperature. |
Enzyme Activity
1. Briefly explain the principle of spectrophotometry.
2. Which of the following statements is true about enzymes?(check all correct answers)
__ enzymes act on (are specific for) one or just a fewsubstrates | ||
__ enzymes can be denatured (loose their tertiary/quaternarystructure and activity) by extreme conditions such as heat, high orlow pH,or presence of organic solvents | ||
__most enzymes are DNA | ||
__ enzymes are protein | ||
| __enzymes perform best at specific conditions of temperature, pHand salt concentration 5. Which enzymes break the following macromolecules? Match the following with their correponding answers: ___ Nucleic acids A. proteases or proteinases such as pepsin ___ Cellulose B. none ___ Triglycerides C. lipases ___ Proteins D. amylases ___ Starch E. nucleases 6.Match the following enzymes totheir products. Answers ___ pepsin, trypsin and other digestive proteases A.Nucleotides ___ salivary and pancreatic amylases and other enzymes B. AminoAcids ___ lipases C. Monosaccharides ___ nucleases D. fatty acids and glycerol 7. Based on experiments, what is the effect of extremeconditions of pH and temperature (boiling tube) on enzymeactivity? 8. ATP stores energy in the form of___ ___ Chemical energy ___ Kinetic energy ___ Thermal energy ___ Activation energy 9. An allosteric site in anenzyme is____ __ the site where reactions occur __ the site that binds aregulator __ the site that binds thesubstrate __ the site that binds the product 10. Enzymes increase the rate of reactions by making thetransition state less stable. __ False 11. Enzymes increase the rate of reactions by placing reactingparts of the molecule in favorable positions. 12. Which of the followingis a mechanism for regulation of enzymes? 13. Which of the following represents a correct order of eventsin an enzyme catalytic cycle? 1.enzyme changes shape 2.substrate binds to active site 3.substrate is converted to products 4. products are released from activesite __ 1>2>3>4 __ 2>1>3>4 __ 3>2>1>4 __ 2>4>3>1 |
