GENE EXPRESSION & MUTATIONS IN DNA. HOW DO CHANGES IN DNA AFFECT PROTEIN SYNTHESIS? WHY IS IT IMPORTANT THAT GENE EXPRESSION IS REGULATED?. ALL our DNA is found inside the nucleus of every single cell in our body! (minus your reproductive cells).
HOW DO CHANGES IN DNA AFFECT PROTEIN SYNTHESIS?
WHY IS IT IMPORTANT THAT GENE EXPRESSION IS REGULATED?
The DNA inside these blood cells is exactly the same as the DNA in these nerve cells!
So, IF WE HAVE THE SAME DNA IN ALL OUR CELLS… WHY DON’T WE HAVE ARMS GROWING OUT OF OUR HEAD?! OR EYEBALL PROTEINS BEING MADE IN OUR HEART??!!
Heart proteins will NOT be created if the DNA strand is NOT being transcribed in the heart cells themselves!
Eyeball proteins will be created if the DNA strand is being transcribed in the eyeball cells!
Substitution– one nucleotide base is changed, or substituted for another.
Original: AUGUAC→ Met – Tyr
Mutated: AUGUAG→ Met – Stop