DNA, RNA & Protein Synthesis. A DNA nucleotide has three parts: a sugar molecule called DEOXYRIBOSE, a phosphate group (which consists of P and O atoms), and a NITROGEN BASE.
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Nitrogen bases: COMPLEMENTARY BASE PAIRS. Cytosine for the structure of DNA that looked like a spiral staircase: DOUBLE HELIX.always pairs with guanine; adenine always pairs with thymine.
DNA REPLICATION- Copying DNA in
*Two nucleotide chains separate
by unwinding; each chain serves as a
template for a new nucleotide chain.
Suppose that the sequence of nucleotides in one chain of the original DNA molecule is A-T-T-C-C-G. DNA polymerases would produce a new nucleotide chain with the sequence of ________________.
Mutations video every 10,000 paired nucleotides. A change in the nucleotide sequence at even one location, (MUTATION), may have serious effects on new cells.
2. URACIL replaces thymine. So, uracil (not thymine) pairs with adenine in RNA.
from the DNA in the nucleus to the cytoplasm of a eukaryotic cell.
Try as a class! proteins. tRNA