Two models—the lock-and-key model and the induced-fit model—attempt to explain the working of an active site (Figure 1). The most simplistic lock-and-key hypothesis suggests that the active site and the molecular shape of the substrate are complementary—fitting together like a key in a ...
(a)Describe how the action of enzymes can be explained by the 'lock and key'hypothesis. 相关知识点: 试题来源: 解析 (a)active site;of specific shape;substrate ;fitare complementary;any ref. enzyme/substrate complex being like lock and key;stress on substrate molecule ;product formed;also ...
The lock and key hypothesis does not explain the broad specificity of some enzymes. Also, the molecular shape of active sites is not always complementary to that of the substrate. The induced-fit model attempts to overcome these difficulties. ...
Forbreakdownofsubstanceslikecarbohydrates,proteinsandfats,complexapparatusandhightemperatureisrequired.Thesecomplexsubstancescanbebrokendowneasilyandquicklybycellsatnormalbodytemperature.Enzymes Enzymesarebiologicalcatalysts.UnlikeinorganiccatalystswhicharenotaffectedbytemperatureandpH,enzymesgetdenaturedathightempandpH....
As only one substrate fits into that enzyme, like a lock and key = the lock-and-key hypothesis. Remember the substrate does not have the same shape as the active site. It has a complementary shape to the active site.;In most enzymes when substrate fits into active site, the shape of ...
Lesson 1 enzymes-IGCSE解读 Biologicalcatalysts IGCSEBiology(Cambridge) Acatalystisasubstancethatspeedsuptherateofachemicalreactionbutisnotitselfchangedbythereaction.Hydrogenperoxidebreaksdowntowaterandoxygen hydrogenperoxide manganeseoxide water+oxygen 2H2O2 2H2O+ O 2 Theescapingoxygencausesthefoaming A...
Explain the catalyst properties of enzymes in terms of the "lock and key" and the induced fit hypothesis and link these to the need for rest, and energy-efficient biochemistry in the human body. How do enzymes affect activation energy?
lock and key hammer and nail jigsaw puzzle seesaw 6. Multiple Choice 20 sec 1 pt The ___ hypothesis describes how an enzymes active site changes shape once the substrate is bonded. hammer and nail induced fit jigsaw puzzle lock and key 使用免费帐户探索所有问题Continue with GoogleContinue...
Studies on the structure and mutarotation of mono- and disaccharides and on the specificity of their enzymic hydrolysis by glycosidases led Emil Fischer to propose the “lock and key” analogy for the interaction of an enzyme with its substrate (1894). The nature of the enyzme molecule itself...
共价催化(亲核亲电催化)Chapter 4-25亲核催化Chapter 4-26二、酶的作用具有高度的专一性(二、酶的作用具有高度的专一性(p154特异性)特异性)Chapter 4-27l 酶作用专一性的机制酶作用专一性的机制结合部位结合部位酶作用的专一性酶作用的专一性锁与锁与钥匙学说钥匙学说 (lock and 12、key thoery)诱导契合学说...