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Published byChester Fleming Modified over 9 years ago
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Nucleic Acids nucleic acids store and transmit hereditary information
Contain the following elements: C, H, N, O, P Two types of nucleic acids: DNA RNA
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1. DNA = Deoxyribonucleic acid
“encodes the instructions”(genetic code) for the specific amino acid sequence of a protein is copied and passed from one generation of cells to another (condensed DNA = chromosome) Eukaryotes- nucleus Prokaryotes- cytoplasm
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2. RNA = Ribonucleic acid functions in the actual
synthesis of proteins coded for by DNA mRNA
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DNA ==> RNA ==> Protein
mRNA carries the encoded information to the ribosomes; tRNA carries the amino acids to the ribosome; & rRNA is a major component of ribosomes DNA ==> RNA ==> Protein
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Structure of Nucleic Acids
Nucleic acids are macromolecules built of monomers called NUCLEOTIDES
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Each nucleotide consists of: 1. 5-carbon sugar: -deoxyribose in DNA
-ribose in RNA 2. Phosphate group (attached to #5 carbon on sugar) 3. Nitrogenous base purines (double ring; A & G) pyrimidines (single ring; C, T & U)
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nucleotides are joined together by phosphodiester linkages (between phosphate of one nucleotide and the sugar of the next) this results in a backbone with a repeating pattern of: sugar-phosphate-sugar-phosphate... 7
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Dehydration Synthesis
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