Cell Biology Chapter 1

An overview of cells and cell research

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Cell function
- maintains a selective barrier - inherit and transmit genetic material - carry out catalyzed rxns - move whole cells and/or contents
Spontaneous synthesis of organic molecules
- first demonstrated by stanley miller- 1950s - provided the basic materials from which the first living organisms arose
Phospholipids
Basic components of all present-day biological membranes, including the plasma membranes of both prokaryotic and eukaryotic cells
Amphipathic molecule
Consist of one portion that is soluble in water and another portion that is not
Hydrophobic
(water-insoluble) - hydrocarbon chains form the inside layer of phospholipids molecules
Hydrophilic
(water-loving) - head groups containing phosphate form the outside layer of phospholipids molecules
Adenosine 5' triphosphate
(ATP) - one source of metabolic energy for all cells
Glycolysis
The anaerobic breakdown of glucose to lactic acid
Photosynthesis
Allows a cell to harness energy from the sunlight
Oxidative metabolism
Principle source of energy for most present day cells and utilize highly reactive O2 to generate from organic molecules
Archaebacteria
Prevalent on the primitive, live in extreme environments - prokaryote
Eubacteria
Large group of organisms that live in a wide range of environment, including soil, water, and other organisms - prokaryote
Cyanobacteria
Largest and most complex prokaryote - derive their energy from photosynthesis
E.coli
Prokaryote-rigid cell wall , plasma membrane ,DNA a circular molecule that resides in nucleoid,ribosomes
Eukaryote cells
Has many membranous enclose organelles, nucleus is the largest, contains most of the genetic materials, DNA molecules,