3756123
Mind Map by katy stopforth, updated more than 1 year ago
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Created by katy stopforth
over 5 years ago
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Description
F212 - Nucleic Acids
1 DNA
1.1 double stranded
1.2 Nitrogenous Bases
1.2.1 Adenine
1.2.2 Thymine
1.2.3 Cytosine
1.2.4 Guanine
1.3 a polynuleotide
1.4 Semi-Conservative Replication
1.4.1 1. DNA
unwinds
1.4.2 2. DNA helicase unzips the DNA
1.4.2.1 breaks the hydrogen
bonds
1.4.2.2 forms two separate
strands
1.4.2.2.1 act as
templates
1.4.3 3. Free DNA nucleotides join to the
bases
1.4.3.1 complementary base
pairing
1.4.3.1.1 purine to
pyramidine
1.4.4 4. DNA polymerase joins the new nuelotides by
strong covalent bonds
1.4.4.1 forming sugar-phosphate
backbone
1.4.5 5. winding enzyme reforms
double helix structure
1.5
2 RNA
2.1 Nitrogenous Bases
2.1.1 Adenine
2.1.2 Uracil
2.1.3 Cytosine
2.1.4 Guanine
2.2 a polynucleotide
2.3 single stranded
2.4
3 Nitrogenous Bases
3.1 Pyramidines
3.1.1 Thymine
3.1.2 Cytosine
3.1.3 Uracil
3.2 Purines
3.2.1 Adenine
3.2.2 Guanine
3.3 Combinations
3.3.1 A,T or A,U
3.3.1.1 two hydrogen bonds
3.3.2 G,C
3.3.2.1 three hydrogen bonds
3.3.3 anti-parallel strands
3.3.3.1 in DNA - the strand twist to
from a 'double helix'
4 Genes
4.1 a sequence of DNA nucleotides that codes
for a polypeptide
5 Role of DNA and RNA
5.1 1. required gene exposed by splitting hydrogen bonds in that section of the DNA
5.2 2. RNA created a complementary strand
5.2.1 mRNA
5.3 3. mRNA leaves nucleis through nuclear pore and attaches to ribosome
5.4 4. tRNA brings amino acids to the ribosome in the correct order
5.4.1 according to base sequence
5.5 5. amino acids joined together by peptide bonds
5.5.1 gives a protein with a specific tertiary structure
