At which steps do cells control gene expression?

Question

anonymous · Answer

A. transcription, translation, and the formation of the final protein
B. transcription, mitosis, and DNA replication
C. mitosis, meiosis, and the formation of the final protein
D. interphase, prophase, and metaphase

anonymous · Answer

I think it's A

anonymous · Answer

@schleifspur

anonymous · Answer

But, it could be B as well.

koikkara · Answer

@faisalalif1999 @schleifspur OS doesn't applaud answers without strong evidences for the options being chosen from the statements !

@@faisalalif1999 Well, so why that statement u say is the answer ?

anonymous · Answer

since gene expression can be controlled during transcription, translation, and the formation of the final protein.

anonymous · Answer

wow, this is a hard one!

before we go into detail, let me make clear that it states 'gene expression', not 'protein expression'!

okay, A is the answer that pops to mind, I understand that. all processes are of course linked to gene expression. cells can of course control gene expression on a transcriptional level (repressors and activators) and on a translational level (where the elongation factor can be modulated, etc.)
on a level of protein manufacturing (which is things like glycosylation, and so on), things get difficult.

so let's take a look at the other options first :)

are you sure that replication is a tool for the cell to control gene expression levels?

anonymous · Answer

i think so

anonymous · Answer

or you propose how the cell controls gene expression at the protein formation level. :)

anonymous · Answer

hm no, I don't know of any mechanisms that would control gene expression by replicating some chromosomes more often than others =)

anonymous · Answer

So, it would be A

anonymous · Answer

what about C and D?

anonymous · Answer

it's obviously not D

anonymous · Answer

D can be excluded, right? in prophase, no genes are expressed at all, same goes for metaphase.

and since the answers in C are not really 'steps', I think A must be right.

anonymous · Answer

also, if you think about proteins that interact with the DNA (like transcription factors), you also get how cells can control gene expression with the formation of the final protein.