Given a DNA sequence, which will be its mRNA?

In summary, mRNA is formed from a DNA sequence through a process called transcription and plays a crucial role in protein synthesis and gene expression. DNA and mRNA differ in their structure and composition, with mRNA being a single-stranded molecule transcribed from DNA. mRNA cannot be directly translated into proteins and needs to undergo processing and modification before being used as a template. Variations in mRNA sequences among individuals can occur due to genetic mutations, potentially leading to changes in protein structure and function and contributing to genetic diseases and disorders.
  • #1
stonecoldgen
109
0
And what will be the peptide sequence formed?

So the sequence is: ADN 3’- TAC-CGA-TAT-AGC-CGT-ATT -5’

so my guess is that it's AUG-GCU-AUA-UCG-GCA-UAA and the peptide sequence is: Start codon, alanin, isoleucine, serine, alanin, stop codon.

My question is: What do those 3's and 5's mean? How would the answer change if their positions were flipped?
 
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  • #2
3' and 5' refers to the carbon of the pentode sugar to which that particular Nitro base is attached to,
If it's flipped the sequence would be in reverse order.
 

1. How is mRNA formed from a DNA sequence?

Messenger RNA (mRNA) is formed through a process called transcription, where the DNA sequence is used as a template to create a complementary mRNA strand. This process is carried out by an enzyme called RNA polymerase.

2. What is the purpose of mRNA in the cell?

mRNA carries the genetic information from the DNA to the ribosomes, where it is used to produce proteins through a process called translation. Thus, mRNA plays a crucial role in protein synthesis and gene expression.

3. What is the difference between DNA and mRNA?

DNA is the genetic material that carries all the instructions for the development and functioning of an organism. It is double-stranded and contains the nitrogenous bases adenine, guanine, cytosine, and thymine. On the other hand, mRNA is a single-stranded molecule that is transcribed from DNA and contains the nitrogenous base uracil instead of thymine.

4. Can mRNA be translated into proteins directly?

No, mRNA cannot be directly translated into proteins. It first needs to be processed and modified in the nucleus before it can be transported to the cytoplasm and used as a template for protein synthesis. This processing includes the removal of non-coding regions and the addition of a cap and tail to the mRNA molecule.

5. Are there any variations in mRNA sequences among individuals?

Yes, there can be variations in mRNA sequences among individuals due to genetic mutations. These mutations can alter the mRNA sequence, which may result in changes in the corresponding protein's structure and function. These variations can also contribute to genetic diseases and disorders.

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