A useful model for enzyme action is the Lock and Key model
Answer: Option D
<u>Explanation:</u>
Enzymes are nothing but chemicals which are used to increase the reaction rate such that the reaction gets completed at faster rate. The working mechanism of enzyme can be best understood by the lock and key model which was put forth by Emil Fischer in 1890.
In this model he explains about the relation between the dynamic site of an enzyme and a substrate particle. The dynamic site was thought to have a fixed structure (the lock), which precisely coordinated the structure of a particular substrate (the key).
When the correct substrate fits in the enzyme it causes enzyme and substrate to interact with each other. The substrate is changed over to products and is subsequently discharged, freeing the protein.
The answer is a hot and tropical i hope this has helped you
Answer:
Air particles are a mixture of solids and liquids that are microscopically tiny and suspended by air currents. It can stay in the atmosphere for a few hours to a month or two. Their constituents can be various harmful substances such as heavy metals - lead, nickel, arsenic, cadmium or polycyclic aromatic hydrocarbons
Explanation:
Air particles, nitrogen dioxide and ground-level ozone are now considered to be the three most polluting substances in human health. Exposure during peak concentration and long-term exposure to these pollutants can cause damage from respiratory distress to premature death.
