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...Life sciences grade annual teaching plan term week days feb march caps topics national examination guidelines p and dna code of paper marks revision the structure cell with an rna location emphasis on ribosome cytoplasm parts natural shape molecule is a double helix mrna formed in nucleus functions each strand f made up sequence nucleotides trna located two types nucleic acids three components nucleotide nitrogenous bases linked by weak hydrogen bonds single stranded consisting consist four adenine thymine t cytosine c guanine g pairing occur as follows present nuclear sugar portion deoxyribose uracil u makes genes chromosomes phosphate ribose mitochondria mitochondrial s stick diagram to illustrate its molecules their e l chloroplasts plants v function d n brief history discovery plays role protein synthesis which carry hereditary information watson crick franklin wilkins contains coded for i involvement k transcription process replication unwinds when cycle it takes place unzips brea...