Time to use your brain andhands in order to reviewnucleotide structure and type. USING YOUR HAND, SHOW ME THYMINE USING YOUR HAND SHOW ME ADENINE SHOW ME CYTOSINE SHOW ME HOW CYTOSINE AND THYMINE BOND TO FORM A RUNG ON THE LADDER THEY DON’T
OK Now that you recognizenucleotide type and structure, it’stime to start building the polymer from these monomers.
In order to make a molecule of DNA,you would need to create many rungsto the DNA ladder. Look. Many Rungs. Etc…
What part of the nucleotide alternatesto form the sides of the DNA ladder? Sugar, Phosphate. Sugar, Phosphate. Sugar, Phosphate. Etc… Etc…
What makes up the“RUNGS” of the ladder? The Nitrogen Bases
Go Ahead!Stack your hands on top of your partner’shands building two rungs of the DNAladder.
Let’s see how well you looked at the diagram…regarding the nitrogen bases, Adenine always bonds with which one? 1. Cytosine 2. Thymine 3. Guanine 4. Uracil 0% 0% 0% 0% e il ne e in c in ra ni ym os ua U yt Th G1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 C21 22 23 24
Transcription• 1.) DNA strand unzips – The bonds between the nitrogen bases are broken• 2.) A single strand of mRNA (messenger RNA) is made – Pair up the bases• 3.) mRNA travels from nucleus to cytoplasm
Why is mRNA called messenger RNA?• Because it carries the directions to make a protein to the ribosome like a message
Translation• mRNA meets up with a ribosome…why??• tRNA molecules bring amino acids to ribosomes• An mRNA codon will pair with a tRNA anticodon – Codon: 3 Nitrogen base sequence in mRNA that specifies a specific amino acid – Anticodon: 3 Nitrogen base sequence in tRNA• As tRNA’s are added, amino acids are bonded together and will be released as a fully functional protein.