Question

factors that affect enzymes
enzymes are proteins that have a very specific shape. certain factors can have a big impact on the shape of the enzyme molecule and therefore the shape of its active site. a change in the shape of an enzyme can affect how well the enzyme can catalyse a reaction. the two main factors which affect enzyme activity are covered below.
factors that affect enzyme activity
words to use: stomach, vibrate, optimum, shape, active, increases, time, denatured, high, acidic, kinetic, decreases
1.) initially as temperature increases, enzyme activity also __________. this is because the enzyme molecules gain more ________ energy and are more likely to successfully collide with the substrate molecules. this leads to more enzyme - substrate complexes being formed and therefore more product is formed in a given _____. the optimum temperature of enzymes in our body is about 40°c.
2.) however, after a certain temperature (about 45°c) the bonds within the enzyme molecule that keep its shape, begin to __________ so violently that they break. this results in the enzyme losing its shape, including the active sites shape. this is called denaturation. as the substrate can no longer fit into the ________ site, the activity of the enzyme dramatically ________. once all the enzyme molecules are __________ the enzyme activity will completely cease.
all enzymes have an __________ ph that their activity will be highest at. as the ph increases or decreases either side of the optimum ph the enzymes activity will decrease. eventually when the ph becomes too low or high for the enzyme it will denature and lose its ________, just like with ________ temperatures. most enzymes in our body work best at around ph 8. however there are some exceptions. pepsin, found in our ________ has an optimum temperature of about ph 2, which is very __________.

Explanation:

1. As temperature rises initially, enzyme - substrate collisions increase due to more kinetic energy, boosting enzyme activity over time. After a certain point, high temperatures cause bond vibrations that break, leading to enzyme denaturation, making the substrate unable to fit the active site and decreasing activity.
2. Enzymes have an optimal pH for maximum activity. Deviations from this pH reduce activity, and extreme pH values cause denaturation, similar to high - temperature effects. Pepsin in the stomach has a low (acidic) optimal pH.

Answer:

1. increases, kinetic, time
2. vibrate, active, decreases, denatured
3. optimum, shape, temperature, stomach, acidic