Presentation is loading. Please wait.

Presentation is loading. Please wait.

Protein Synthesis Involves RNA (base change of uracil for thyamine, single small strand and less stable than DNA). Three types of RNA – messenger (mRNA),

Published byRhoda Hunt Modified over 8 years ago

Similar presentations

Presentation on theme: "Protein Synthesis Involves RNA (base change of uracil for thyamine, single small strand and less stable than DNA). Three types of RNA – messenger (mRNA),"— Presentation transcript:

1 Protein Synthesis Involves RNA (base change of uracil for thyamine, single small strand and less stable than DNA). Three types of RNA – messenger (mRNA), transfer (tRNA) and ribosomal (rRNA). It is the formation of a protein by the code on the DNA.

2 This stage is called transcription, it occurs in the nucleus. DNA is unzipped by the enzyme RNA polymerase. It binds to part of the DNA called a promoter, this prises the two strands apart. the leading strand is copied only to make a strand of mRNA. Introns: not transcribed, contain regulator genes and other genes for different parts of the body.

3 The DNA rewinds once the section to be copied is done. The start codon is always AUG, stop codon can vary. Unlike DNA rep. one side is copied to make a single strand of RNA that contains the code for a protein. mRNA moves by diffusion out the nuclear pore to the cytoplasm of the cell where protein synthesis occurs.

4 Stage 2 is translation: mRNA moves to the ribosome into a slot which then readsthe message on the mRNA and translates it. It triggers the tRNA to bring the appropriate amino acid to the ribosome. The anticodon on the tRNA matches the codon on the mRNA. The amino acid is added to the polypeptide chain and the tRNA is recycled. As an amino acid is joined the ribosome ‘nudges’ the mRNA along 3 notches.

5 To summarise: 2 stages One in nucleus = transcription One in cytoplasm = translation tRNA and rRNA reused mRNA breaks down End result is a protein which is then moved to where it is needed

6 Remember: The code of the DNA specifies the order of the amino acids in the polypeptide chain. The order determines the shape of the protein which determines the function of it. The 3 base code on the DNA is a triplet The 3 base code on the mRNA is a codon The 3 base code on the tRNA is the anticodon

7 Exceptions to usual Protein Synthesis Viruses -Some have RNA but no DNA so RNA is replicated by RNA -Some have reversed the order of RNA and DNA. RNA is their permanent genetic code and is transcribed into DNA. Called reverse transcription and is done by enzymes. DNA RNA Protein Reverse transcription Translation

Download ppt "Protein Synthesis Involves RNA (base change of uracil for thyamine, single small strand and less stable than DNA). Three types of RNA – messenger (mRNA),"

Similar presentations

RNA and Protein Synthesis

RNA and Protein Synthesis
End Show Slide 1 of 39 Copyright Pearson Prentice Hall Biology Protein Synthesis: I will understand the general pathway of transcription and translation.

End Show Slide 1 of 39 Copyright Pearson Prentice Hall Biology Protein Synthesis: I will understand the general pathway of transcription and translation.
Cell Protein Production

Cell Protein Production
RNA and Protein Synthesis

RNA and Protein Synthesis
RNA Transcription.

RNA Transcription.
PROTEIN SYNTHESIS.

PROTEIN SYNTHESIS.
DNA: Transcription & Translation How do we go from DNA to PROTEIN?

DNA: Transcription & Translation How do we go from DNA to PROTEIN?
RNA and Protein Synthesis. DNA to RNA to Protein Focus Questions: –How does the message coded in the base sequence of DNA eventually create a protein?

RNA and Protein Synthesis. DNA to RNA to Protein Focus Questions: –How does the message coded in the base sequence of DNA eventually create a protein?
Protein Synthesis The production (synthesis) of polypeptide chains (proteins) Two phases: Transcription & Translation mRNA must be processed before it.

Protein Synthesis The production (synthesis) of polypeptide chains (proteins) Two phases: Transcription & Translation mRNA must be processed before it.
RNA Ribonucleic acid single stranded also made of nucleotides.

RNA Ribonucleic acid single stranded also made of nucleotides.
Transcription and Translation

Transcription and Translation
Protein Synthesis. The DNA Code It is a universal code. The order of bases along the DNA strand codes for the order in which amino acids are chemically.

Protein Synthesis. The DNA Code It is a universal code. The order of bases along the DNA strand codes for the order in which amino acids are chemically.
VII RNA and Protein Synthesis

VII RNA and Protein Synthesis
Chapter 13.1 and 13.2 RNA, Ribosomes, and Protein Synthesis

Chapter 13.1 and 13.2 RNA, Ribosomes, and Protein Synthesis
Transcription and Translation. What is Transcription? It is a process that produces a complementary strand of RNA by copying a complementary strand of.

Transcription and Translation. What is Transcription? It is a process that produces a complementary strand of RNA by copying a complementary strand of.
RNA and protein synthesis. RNA Single strand of nucleotides Sugar is ribose Uracil instead of thymine.

RNA and protein synthesis. RNA Single strand of nucleotides Sugar is ribose Uracil instead of thymine.
DNA to Proteins 3-4.

DNA to Proteins 3-4.
SC.912.L.16.5 Protein Synthesis: Transcription and Translation.

SC.912.L.16.5 Protein Synthesis: Transcription and Translation.
Protein Synthesis 1 Background Information All information is stored in DNA All information is stored in DNA RNA “reads” the DNA code RNA “reads” the.

Protein Synthesis 1 Background Information All information is stored in DNA All information is stored in DNA RNA “reads” the DNA code RNA “reads” the.
RNA and Protein Synthesis. Write these terms in your journal Ribosome — makes proteins Ribosome — makes proteins RNA polymerase — enzyme that puts together.

RNA and Protein Synthesis. Write these terms in your journal Ribosome — makes proteins Ribosome — makes proteins RNA polymerase — enzyme that puts together.

Similar presentations

Ads by Google