What do you think is the purpose of DNA ...why does it exist at all? Is DNA found in all creatures? How different is DNA among different creatures? A dog? A banana? A bacterium?. DNA The Blue Prints of Life!.
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What do you think is the purpose of DNA ...why does it exist at all? Is DNA found in all creatures?How different is DNA among different creatures? A dog? A banana? A bacterium?
The Blue Prints of Life!
If the total DNA in one person were laid in a straight line, it would stretch to the sun and back over 600 times (it's 93 million miles from here to the sun).
You could fit one million threads of DNA across the period at the end of a sentence.
Modern Humans have about 1 – 4 % Neanderthal DNA.
The difference between your DNA and the person next to you is less than 0.1%.
You share about 96% of your DNA with a Chimpanzee, our closest relative on planet Earth.
You share about 60% of your DNA with a Banana.
What is a Genetic Code?
Do you understand how to match up the bases??? IF NOT ASK FOR HELP NOW!!!
Rosalind Franklin also played a major role in the ladder’s discovery because Watson and Crick used her photos of the DNA ladder to figure out and assemble the model.(Unfortunately she died 4 years before the nobel prize was awarded at the age of 37 of ovarian cancer. Her contributions were made known later after the award was given. According to Nobel Prize Rules, the individual must be alive in order to receive the award )
Born: London, England, July 25, 1920
Died: London, England, April 16, 1958
Pioneer Molecular Biologist
There is probably no other woman scientist with as much controversy surrounding her life and work as Rosalind Franklin. Franklin was responsible for much of the research and discovery work that led to the understanding of the structure of deoxyribonucleic acid, DNA.
DNA replicationis an important process because as cell divide, it is critical that the two daughter cell are identical to the original cell.
Now we will look at how DNA replication take place.
Each strand (side) of DNA serves as a template for a new strand of DNA
Steps of replication:
Enzymes unzip DNA breaking hydrogen bonds between bases.
The two strands unwind.
Each DNA strand serves as a template for complementary bases.
Example: TEMPLATE DNA: TAC-GTT
NEW DNA: ATG-CAA
DNA replicates itself exactly so that each new cell will have an identical copy of the original DNA ladder.
There are 3 different types:
Just like DNA, RNA is made of Nucleotides: A, U, C, G.
Notice, RNA does not contain thyamine (T) as a base, but instead has uracil (U).
So in RNA its AU and CG
Why make protein?
Proteins are needed for cell structure and movement, makes enzymes and nucleotides.
Transcription is the process in which a molecule of DNA is copied into a complementary strand of RNA.
DNA is in the nucleus and can’t leave, so a messenger RNA-(mRNA) must bring the genetic information from the nucleus to the ribosomesin the cytoplasm
RNA polymerase attaches to DNA and moves along it unwinding the two strands
RNA nucleotides match up with the bases of DNA
Ex: DNA TGCACGCA
EXAMPLES OF CODONS
YOUR TEACHER WILL TEACH YOU HOW TO USE THE CODON TO IDENTIFY THE AMINO ACID
It carries the message or instructions on how to assemble something.
This message is carried from the nucleus to a ribosome which is located outside of the nucleus.
1. tRNA bind to the mRNA.
2. a “start” codon start the protein synthesis.
3. tRNA contains 3 complementary nucleotides to the mRNA called the anticodon; once it matches it leaves behind amino acid and next codon is read.