Protein Synthesis

Write the complementary DNA strand for each of these DNA strands: DNA GAATTACA CCAATTAG ATAGACAG CCAGTACA DNA

Here is a practice website if you are connected to the internet:

Each of the 96 columns represents one DNA sequence. A different colored dye attached to each of the four nucleotides.

Replication

Semi-Conservative Replication Each strand of the original molecule acts as a template for the synthesis of a new complementary DNA molecule

With semi-conservative replication, each new strand is ½ new and ½ old

Examples of DNA Replication

RNA (ribo-nucleic acid)

Differences between DNA and RNA 1.Different sugars (DNA=deoxyribose) (RNA=ribose) 2.RNA is single stranded (1 side) DNA is double stranded (2sides) 3.RNA has “U” (uracil) DNA has “T” (thymine)

Always remember… RNA loves U

Write the RNA strand for each of these DNA strands: ½ Strand of DNA GAATTACA CCAATTAG ATAGACAG CCAGTACA RNA

Transcription The process by which DNA is copied into mRNA

mRNA Messenger RNA, is the copy of the DNA that goes from the nucleus to the ribosome

FACT Proteins are made up of amino acids

tRNA Transfer RNA, matches up with mRNA and has an amino acid on its top

CODON Each combination of 3 nucleotides on a strand of mRNA

ANTICODON Each combination of 3 nucleotides on a tRNA

Translation The decoding of a mRNA message into proteins

rRNA Ribosomal RNA, glues together all of the amino acids into a polypeptide chain

For a great link on protein synthesis go to: %20long.html

Table of Codons