F. Cell is end-result of life origin and fundation of organism evolution G. No cel. no full life Irus Euvirus( virus): DNA or RNa and proteins complex Viroid: The infective RNA constitute, discover Grow about 20 remainings Ⅴ irus of朊( prion): infective proteins
F. Cell is end-result of life origin and fundation of organism evolution G. No cell, No full life. Virus : Euvirus( virus): DNA or RNA and proteins complex Viroid: The infective RNA constitute, discover Grow about 20 remainings Virus of 朊 ( prion):infective proteins
3. Basic properties of cells A. Cells are highly complex and organized, capable EUKARYOTIC of self-regulation; B. Cells acquire and utilize energy Mitochondrion C. All cells share similar structure composition and metabolic features. Plasma membrane DNA/RNA and Ribosome
3. Basic properties of cells A. Cells are highly complex and organized, capable of self-regulation; B. Cells acquire and utilize energy. C. All cells share similar structure, composition and metabolic features: Plasma membrane, DNA/RNA, and Ribosome
D. Cells can capable of producing more of themselves even grow and reproduce in culture for extended periods. HeLa cells are cultured tumor cells isolated from a cancer tient named Henrietta Lacks in 1951. It is the first human celll to be kept in unture for lo periods of time and is still used today. Johns Hopkins 15u ivesity, in 1951
D. Cells can capable of producing more of themselves, even grow and reproduce in culture for extended periods. HeLa cells are cultured tumor cells isolated from a cancer patient named Henrietta Lacks in 1951. It is the first human cell to be kept in culture for long periods of time and is still used today. Johns Hopkins univesity,in 1951
E. Cells are able to respond to stimuli via surface receptors that sense changes in the chemical environment Cells within plant or animal respond to stimuli less obviously than single-celled protist. But they respond. They posses receptors that interact with substances in the environment in highly specific ways. For example, the receptor on the cell surface can respond to hormones and growth factors
E. Cells are able to respond to stimuli via surface receptors that sense changes in the chemical environment. Cells within plant or animal respond to stimuli less obviously than single-celled protist. But they respond. They posses receptors that interact with substances in the environment in highly specific ways. For example, the receptor on the cell surface can respond to hormones and growth factors
5. The size of cells Human height Length of some nerve and a)diameter muscle cell 0.1m Chicken ego b) Measured in units of Cell micrometers: lum=10-0 meter Frog egg nanometers: Inm=10-9 meter 100um Eukaryotic cells c) Cell size is limited Nucleus Most bacterin nucleus/cytoplasm ratio through the cytoplasm via diffusion, oimL bk surface area/volume ratio Ribosomes tOnm Lods substances can efficiently travel
5.The Size of Cells a) diameter b) Measured in units of Cell micrometers: 1um=10-6 meter nanometers: 1nm=10-9 meter c) Cell size is limited: nucleus/cytoplasm ratio; ❖ surface area/volume ratio; ❖ substances can efficiently travel through the cytoplasm via diffusion