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DNA and Protein Synthesis - BioTopics Website

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Regionalization of DNA and protein synthesis in …

For initiation of the translation process, the ribosome binds to the mRNA at the start codon recognized by the initiator tRNA. The ribosome then proceeds to the elongation phase of protein synthesis. During this stage, the complexes formed by amino acids are linked to tRNA, sub sequentially to bind to the appropriate codon in mRNA by forming complimentary base pairs with the tRNA anticodon. The ribosome moves from codon to codon along the mRNA. Amino acids are added one by one, translated into polypeptide sequences dictated by the DNA and represented by mRNA. At the end, release factor binds to the stop codon, thus terminating the translation stage and completing the protein synthesis process. The complete polypeptide is released from the .

Protein synthesis :: DNA from the Beginning

Most enzymes are proteins, but RNA
molecules can be enzymes too.

The ribosome is not only complex, but it is also the most important part of the biological cell, along with the necessary information
needed to make proteins (encoded in DNA or RNA).

Protein Synthesis Stage 1: Transcription - YouTube

Problem in Concept 21: RNA is an intermediary between DNA and protein, DNA from the Beginning.

I mean, replicate the strand of DNA on your desk.
Mistakes made during DNA replication or protein synthesis called

Read about mutations on your handout.

Protein is complete and falls off of the ribosome
Our mug is now not only empty, but it is gone all together
The second part of protein synthesis is called
Now go replicate your DNA!
Well, not really, although your DNA is replicating right now without your help.

DNA and protein synthesis was ..

The process of copying of the genetic information from one strand of DNA into RNA is termed as transcription. This is the first step required for synthesis. Transcription is also based on the complementarity of the strand. Also, only one strand of the DNA is converted into . One transcription unit consists of 3 regions: A promoter, the Structural Gene and a Terminator. The promoter is located towards the 5’ end and defines the template and coding strand. The terminator is towards the 3’ end defining the end of transcription process. The is transcribed in 5' to 3’ direction by polymerase.

Protein synthesis
has two stages:
is the process of making an
strand from the DNA.
is the making of
from the
Translate means to change "languages" (from nucleic acids to amino acids)
Transcribe means to make a copy of something from one source to another
There are three steps to transcription.
Step 1 - a protein known as
RNA polymerase
attaches to a specific part of the DNA molecule
(the promoter)
Step 2 - The
RNA polymerase
unwinds and separates the DNA double helix.
Step 3 -
RNA polymerase matches complimentary bases to
of the DNA strands.

The nitrogen base
binds to
rather than

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  • DNA: Structure, Replication and Protein Synthesis by …

    DNA and protein synthesis in developing stages of the parasitic platyhelminth Echinococcus granulosus

  • Transcript of DNA: Structure, Replication and Protein Synthesis

    13/02/2012 · 8 videos Play all DNA and Protein Synthesis Craig Savage; DNA Replication - Duration: ..

  • DNA: Structure, Replication and Protein Synthesis ..

    The expression of N-terminal deletion DNA pilot proteins inhibits the early stages of ..

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Protein synthesis has two stages:

300 animation in textbook
Step 2 -
Complimentary bases are added to each strand.

As the strands separate, new nitrogen bases (actually nucleotide units) are added by proteins called
DNA Polymerases.

This continues until both strands are completely copied.
Replication Is Complete
(and more)
When the process is over there are two
copies of the DNA molecule.
Why is it important that the copies be identical?
There are about 100 starting points when a human DNA molecule is copied.
It takes about eight hours to copy a human DNA molecule.
Protein Synthesis
Process of reading DNA instructions and making proteins

What Is the Role of DNA in Protein Synthesis?

The process of polymerization of amino acids to form a polypeptide is called as Translation. It is the second and final step of protein synthesis. The order into which the amino acids are arranged is defined by the bases in mRNA (messenger). Ribosome is the cellular factory responsible for the protein synthesis. The ribosome consists of structural RNAs and about 80 different . It is in inactive stage and exists as two subunits, one large and other small. The synthesis of begins when the small subunit encounters an mRNA. The ribosome also acts as a catalyst for the formation of bonds.

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