Regulating Translation: RNA interference (RNAi) by small interfering RNA (siRNA). A-level Biology

Learn how protein synthesis can be regulated through regulating translation. Learn what RNA interference (RNAi) is and how siRNA are responsible for this process.

For past paper questions linked to this topic click these links.

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[reenabains]

Queen thank u so much for this you are single handedly getting me through a levels

[lucylu]

I still use your videos for revision at uni :) this makes me so nostalgic for alevels omg i want to go back

[izzygoff]

Not to be dramatic but these videos make anything seem possible, if I was in a Disney film I would definitely be singing

[marthabuckler]

My teacher explained this is in the most complex way and you’ve got it down in four points and I’m here like 🤯🤯 because I didn’t know ut was allowed to be that simple. Thank you 🫶🫶

[JP-uejr]

do we need to know the specific names of the enzymes?

[Ughwhateverok]

i follow ur video and another persons videos and you guys have the same marking points and method. for some reason in my college its a lot complexer with unnecessary points that confuse u up. they say that rna gets cuts and not mrna and when i told them these marking points they said that the aqa approved book has a different method 😭 i prefer ur one.

[kujojotaro]

at 2:40 it says an enzyme can cut mRNA into siRNA, but on the diagram it says dsRNA. I dont understand what you mean?

[manavdivecha]

What is the point of post-transcription gene expression control. Transcribing a gene requires energy, so why would our cells expend energy transcribe a gene only for its result mRNA to be destroyed and for the gene to be suppressed?

[uwotm]

Hi miss, how is RNA interference used to combat viruses?

[Osama_Alkadomi]

This came up on A level edexcel paper 1 paper

[uig]

Hi miss, just wondering what RISC stands for and it’s meaning? Thanks so much

[adailyfact]

When you say an enzyme can cut the mRNA into siRNA, do you mean the enzyme can cut the dsRNA?

[zuzannaopalka]

Do we need to know the names of the 2 enzymes for AQA?

[davidmkwizu]

Good video but you didn’t talk about mirna is that not a part of the spec.

[SuperStargazer]

There is no explanation where the double stranded RNA came from?

[tania-vqdi]

hi! for aqa do we need to know about RISC?

[atrappy]

i thought rna was a single stranded molecule