pptx, 3.02 MB
pptx, 3.02 MB
docx, 27.04 KB
docx, 27.04 KB

T Level Health, Core B core science concepts. Template adapted from Canva.com.
B1.12 The purpose of deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) as the carrying
molecules of genetic information:
• DNA holds genetic information
• RNA transfers genetic information from DNA to the ribosomes where proteins are synthesised
B1.13 The relationship between the structure of DNA and RNA and their role in the mechanism of
inheritance:
• nucleotides are the molecules (monomers) from which DNA and RNA are formed
• each nucleotide is formed from pentose, a nitrogen-containing organic base and a phosphate group
• the components of a DNA nucleotide are deoxyribose, a phosphate group and one of the organic
bases adenine, cytosine, guanine or thymine
• the components of an RNA nucleotide are ribose, a phosphate group and one of the organic bases
adenine, cytosine, guanine or uracil
• a condensation reaction between 2 nucleotides forms a phosphodiester bond
• a DNA molecule is a double helix with 2 polynucleotide chains held together by hydrogen bonds
between specific complementary base pairs
• an RNA molecule is a relatively short single stranded polynucleotide chain

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