00:01
The question says here in this question we are asked about the signal transduction pathway or how does the cascade of event occur in this case.
00:11
So signal transduction pathway as mentioned before it is a series of events or it can be simply said as a cascade of process that activates certain enzymes and hence in the end activates a certain process.
00:31
So this is very important for transcription and also sometimes for all the processes.
00:37
Transcription in the sense it is in it around every process in a cell summarized right so for every process signal transduction path important.
00:47
For example we can take the example of the lactose metabolism that is a lack of pero how the presence or absence of glucose can regularly the operon is a very good example.
01:02
So when glucose is present in the medium where the e.
01:06
Coli bacteria is growing, the glucose metabolizes and hence the byproduct of the glucose metabolism, alpha -ketogluterate, is also formed in the crept cycle, right? so this alpha -ketogluterate blocks a certain enzyme by the name cyclic adenylase.
01:28
This cyclic adenylase, this cyclic adenylase, is further needed for the synthesis of certain other molecules.
01:33
Hence, if it is not present, the further process is not going to be seen.
01:39
When glucose is absent, there is no metabolism of glucose, hence there is no byproduct that is alpha keto gluturate...