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Results tagged with molecular-genetics
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user 6136
The scientific study of the structure and function of genes at the molecular level, particularly chromosomes and DNA.
5
votes
2
answers
3k
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How does optogenetics work?
I am aware of the post here 'Optogenetics - How do microbial opsins work?'
however it is a bit too technical for me. I am struggling to understand how the neurons can be genetically engineered to prod …
- 2,969
2
votes
1
answer
5k
views
What are microRNA, siRNA and antisense RNA?
From what I understand, microRNA binds to proteins which can cut certain mRNA strands do that this protein is not synthesised. This seems like gene silencing to me, however I have also come across the …
- 2,969
2
votes
2
answers
455
views
How does alternative splicing work?
I am trying to find out what controls what exons are spliced out, and I keep coming across the term cis regulator, but I cannot seem to find a clear explanation of what happens...
Thank you in advanc …
- 2,969
4
votes
1
answer
1k
views
What is the purpose of two cell divisions in meiosis?
At the moment, my thoughts are that the two cell divisions are necessary for recombination to occur, although I am not sure. I cannot really see why technically, the chromosome from each parent cannot …
- 2,969
1
vote
0
answers
47
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Are RNA transcripts always synthesised from the same DNA strand? [duplicate]
The DNA is read 3'->5' (and RNA synthesized 5'->3'). But due to the DNA strands having to be complementary, it seems to me that the origin can only appear on the correct side of the ORF on one of the …
- 2,969
6
votes
1
answer
6k
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Lac operon: How can lactose enter the cell in the absence of lactose permease?
My textbook states that
lactose permease...transports lactose into the cell
and
When lactose is added to the growth medium, the lactose molecules bind to the other site on the repressor prot …
- 2,969
3
votes
0
answers
196
views
Question about genetic recombination
I am having some difficulty understanding a few things about genetic recombination, in part because of confusion from different diagrams in books.
First of all, I wanted to verify whether I have und …
- 2,969