ANTHRO 101 Lecture Notes - Lecture 29: Deoxyribose, Cell Membrane, Paramecium
Document Summary
All cells come from cells. rudolf virchow. Cells reproduce by cell division, in which a parent cell normally gives rise to two daughter cells. In typical cell division, each daughter cell receives a complete set of hereditary information, usually identical to that of the parent cell, and about half the cytoplasm. Cell division transmits hereditary information to each daughter cell. Deoxyribonucleic acid (dna) = hereditary info of all living cells contained in one or more chromosomes. The dna in a chromosome consists of two strands of nucleotides wound around each other, like a twisted ladder double helix. Genes = units of inheritance; segments of dna ranging from few hundred to thousands of nucleotides long. For a cell to survive, it must have a complete set of genetic instructions: cell must first replicate its dna to make two identical copies for each daughter cell. Cell division is required for growth and development.
