Welcome to your CIE AS Enzymes In lock and key hypothesis, substrate is the: Key Lock Both lock and key Magenta moleculeThe purpose of hydrophillic R group in enzymes is: To help protein molecules coil in 3 dimentional space. To ensure that they are soluble. To add to the stability of the enzyme. To prevent the enzymes from being denatured at higher temperatures.What is the modern hypothesis for enzyme action? Enzyme substrate hypothesis Lock and substrate hypothesis Induced fit hypothesis Lock and key hypothesisThe rate of an enzyme-controlled reaction is always _______ at the begining. Fastest Neutral Fluctuating SlowestThe fitting of substrate in active site is called as: Hydrolysis Polymerization Lock and key hypothesis CondensationA molecule which speeds up a chemical reaction but remains unchanged at the end of the reaction. Inhibitor Substrate Product CatalystWhat is the optimum temperature of most human enzymes? Around 45°C Around 40°C Around 26°C Around 30°CWhat are the factors that affect enzyme action? a) Enzyme concentration b) Substrate concentration c) pH d) Temperature c & d only b, c & d All a, b & cSelect the incorrect statement regarding enzymes. Not all enzymes operate within cells. Enzymes are biological catalysts. Denaturation of enzymes is a reversible process. Some enzymes, such as those found in bacteria living in hot water springs have much higher optimum temperatures.What is meant by 'denaturation' of enzymes? The enzyme losing its shape and activity The enzyme beginning to look for other substrates The enzyme losing its shape only The enzyme losing its activity onlyTime is Up!