Nucleic Acids and Cell Division
1.6 Nucleic acids
(a) Structure of nucleotides (pentose sugar, phosphate, organic base) as subunits of nucleic acids.
(b) Structure of nucleic acids: DNA bases: purines-adenine and guanine, pyrimidines-cytosine and thymine, complementary base pair rule, hydrogen bonding and the double helix (triple and double bonding not required), antiparallel strands. Comparison between the structure of RNA and DNA.
1.7 Genetic information is copied and passed on to daughter cells.
(a) Interphase (no subdivisions required) and the main stages of mitosis. Significance of mitosis as a process in which daughter cells are provided with identical copies of genes. Cytokinesis in animal cells.
(b) Significance in terms of damage and disease: repeated cell renewal, damage repair and healing and unrestricted division leading to cancerous growth.
(c) Significance of difference between mitosis and meiosis (no stages of meiosis required).
(a) Structure of nucleotides (pentose sugar, phosphate, organic base) as subunits of nucleic acids.
(b) Structure of nucleic acids: DNA bases: purines-adenine and guanine, pyrimidines-cytosine and thymine, complementary base pair rule, hydrogen bonding and the double helix (triple and double bonding not required), antiparallel strands. Comparison between the structure of RNA and DNA.
1.7 Genetic information is copied and passed on to daughter cells.
(a) Interphase (no subdivisions required) and the main stages of mitosis. Significance of mitosis as a process in which daughter cells are provided with identical copies of genes. Cytokinesis in animal cells.
(b) Significance in terms of damage and disease: repeated cell renewal, damage repair and healing and unrestricted division leading to cancerous growth.
(c) Significance of difference between mitosis and meiosis (no stages of meiosis required).