nucleic acids
- Created by: Olivia.howard24
- Created on: 27-04-17 12:19
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- 1B. Nucleic acids
- DNA
- Deoxyribonucleic Acid
- Adenine & Thymine (2 H-bonds)
- stores the genetic information
- made of two polynucleotides - double helix
- Cytosine & Guanine (3 H-bonds)
- RNA
- Made up of nucleotides
- pentose sugar, organic base, phosphate group
- DNA
- Deoxyribonucleic Acid
- Adenine & Thymine (2 H-bonds)
- stores the genetic information
- made of two polynucleotides - double helix
- Cytosine & Guanine (3 H-bonds)
- Join together to form polynucleotides
- phosphodiester bonds
- condensation reaction
- Ribonucleic acid
- Cytosine & Guanine (3 H-bonds)
- Adenine & Uracil (2 H-bonds)
- single polynucleotide chain, much shorter than DNA
- Made up of nucleotides
- Water
- vital to living organisms
- high latent heat of vaporisation
- high specific heat capacity
- strong cohesion between water molecules
- can buffer to resist changes in temp
- vital to living organisms
- DNA Semi-conservative Replication
- 1. DNA helicase breaks down the H-bonds, unwinds the DNA
- 2. The 2 original strands then act as a template for free-floating nucleotides to pair with
- 3. condensation reactions join the nucleotides together, catalysed by DNA polymerase
- DNA Polymerase moves in opposites ways along the antiparallel strands as it is complementary to the 3' and 5' end
- 4. the new DNA has an original and new strand
- Meselson & Stahl
- Inorganic Ions
- an atom with an electric charge
- Iron ions are important for haemoglobin
- Hydrogen ions (H+) determine pH
- Sodium ions (Na+) help transport glucose and aa's across membranes
- Phosphate ions are an essential component of ATP and DNA
- ATP
- the immediate source of energy in a cell
- made by ATP synthesis
- used in respiration
- made of base Adenine, a ribose sugar and 3 phosphate
- used by hydrolysing ATP to release the energy and form ADP + Pi
- DNA
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