B State whether the following statements are true or false. 1. Yeast respires aerobically.
2. Plants do not respire at all.
3. Earthworm respires through their moist skin.
4. Insects respire through gill.
5. Respiration releases energy for various metabolic activities.
6. Respiration is a process involved in breathing.
7. Tracheae are connected to tube like structures called spiracles?​

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.