Download presentation
Presentation is loading. Please wait.
Published bySabrina Ray Modified over 8 years ago
1
RNA & Transcription
2
Contains the genetic instructions used in the development and functioning of all organisms Found in the nucleus of cells! Made up of Nucleotides Sugar (deoxyribose) Phosphate Nitrogenous Base Adenine Thymine Cytosine Guanine
3
1 DNA strand 2 DNA strands The first DNA strand acts as a template for the newly formed strand of DNA DNA polymerase copies the new strand of DNA Practice replicating DNA!!!
5
Single stranded Sugar is Ribose DNA = Deoxyribose RNA is Copied from DNA during a process called transcription Made up of nucleotides Does not contain thymine Uracil (U) replaces thymine in RNA strand
6
DNA ATT GAT CAT AGT RNA UAA CUA GUA UCA
7
mRNA- (messenger RNA) sends the message of DNA to the ribosomes rRNA- (ribosomal RNA) make up ribosomes (place of protein assembly) tRNA- (transfer RNA) transfers the RNA message into proteins
8
Makes RNA from DNA DNA- GCA CTA GTC ATC RNA- CGU GAU CAG UAG End Result: 1 DNA strand 1 mRNA Strand
10
1. RNA polymerase, an enzyme, binds to DNA found in the nucleus and separates the DNA strands 2. RNA polymerase then uses one strand of DNA as a template for assembling a strand of mRNA that is then released into the cytoplasm.
11
DNA Replication 1 DNA Strand 2 DNA Strands Transcription DNARNA Translation RNAProtein End of DNA /RNA
12
The sequence of nucleotides serves as instructions for the order of amino acids Proteins are made from joining many amino acids into a long chain The code is read 3 letters at a time
13
Every three nucleotides is a word known as a codon. AGTTCCGAT Each specific codon represents a single amino acid Chains of amino acid make proteins 64 different codons
14
Decoding of a mRNA into a polypeptide chain or protein. First mRNA is transcribed from DNA and released to the cytoplasm
15
Step 1: A ribosome forms around a molecule of mRNA needs the start codon AUG Step 2: Each codon allows the proper amino acid to be brought into the ribosome by tRNA. Step 3: The amino acids are attached together along an “assembly line” to form a chain.
18
Step 4: The new protein grows as the codons are 'read‘ until a stop codon appears Step 5: The completed protein is released.
20
http://www- class.unl.edu/biochem/gp2/m_biology/anima tion/gene/gene_a3.html http://www- class.unl.edu/biochem/gp2/m_biology/anima tion/gene/gene_a3.html http://www.stolaf.edu/people/giannini/flasha nimat/molgenetics/translation.swf http://www.stolaf.edu/people/giannini/flasha nimat/molgenetics/translation.swf http://www.brookscole.com/chemistry_d/te mplates/student_resources/shared_resources /animations/protein_synthesis/protein_synth esis.html http://www.brookscole.com/chemistry_d/te mplates/student_resources/shared_resources /animations/protein_synthesis/protein_synth esis.html
21
http://highered.mcgraw- hill.com/olc/dl/120077/micro06.swf http://highered.mcgraw- hill.com/olc/dl/120077/micro06.swf http://www.fed.cuhk.edu.hk/~biology/teachin g/genetics/animations/translation.htm http://www.fed.cuhk.edu.hk/~biology/teachin g/genetics/animations/translation.htm
22
http://www- class.unl.edu/biochem/gp2/m_biology/anima tion/gene/gene_a3.html http://www- class.unl.edu/biochem/gp2/m_biology/anima tion/gene/gene_a3.html http://www- ass.unl.edu/biochem/gp2/m_biology/animati on/gene/gene_a3.html http://www- http://www.fed.cuhk.edu.hk/~biology/teachin g/genetics/animations/translation.htm http://www.fed.cuhk.edu.hk/~biology/teachin g/genetics/animations/translation.htm
23
http://highered.mcgraw- hill.com/olc/dl/120077/micro06.swf http://highered.mcgraw- hill.com/olc/dl/120077/micro06.swf http://www.brookscole.com/chemistry_d/te mplates/student_resources/shared_resources /animations/protein_synthesis/protein_synth esis.html http://www.brookscole.com/chemistry_d/te mplates/student_resources/shared_resources /animations/protein_synthesis/protein_synth esis.html
24
Start codon- "AUG" - Methionine signals initiation translation Stop Codon- "UAG, UAA, and UGA" signals termination of translation
25
UUUCAGGAA AUACCGAGA GCUGACUAC
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.