In 1940, Danielli and Davson proposed that the cell membrane was a bilayer of phospholipids. These phospholipids were sandwiched between two continuous layers of proteins as shown. Later, electron micrographs revealed proteins embedded in the
phospholipid bilayer. Unlike the Danielli-Davson proposal, the proteins were scattered throughout the outer surfaces.
Protein
Phospholipid
Bilayer
Which of the following best modifies the Danielli-Davson model of the cell membrane?

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.

correct answer: false

while planning water activities, it is very important to consider the weather, because if we do not plan and are going for a surf, then it might be that the hurricane came and drown us or may carry us to long distance from where we can not come back. there are many reasons to take information about the weather when we are planning any water activities.

hence, the correct answer would be false.