Cell Biology IB SL Biology

Elisabeth Morell
Mind Map by Elisabeth Morell, updated more than 1 year ago
Elisabeth Morell
Created by Elisabeth Morell almost 5 years ago


A-Level Biology Mind Map on Cell Biology IB SL Biology, created by Elisabeth Morell on 02/03/2015.

Resource summary

Cell Biology IB SL Biology
1 2. Cells
1.1 3. Common features:
1.1.1 Surrounded by a membrane
1.1.2 Contain genetic material
1.1.3 Cell activity is catalyzed by enzymes produced in the cell The chemical reactions are known as metabolism
1.1.4 Have their own energy release systems
1.2 3. Cell Theory
1.2.1 Living organisms are composed by cells
1.3 3. Unicellular Organisms
1.3.1 Prokarytes Cell structure Has DNA In the cytoplasm in the nucleoid No proteins Cytoplasm Holds the DNA Cell Wall Archaeans don't have cell walls Cell wall is outside the cell membrane. Contains peptidoglycan. Extracellular. Ribosomes In the cytoplasm, makes proteins Plasma membrane Provides barrier and support for the cell Photosynthesis can occur in the plasma membrane Cellular respiration occurs in the plasma membrane Is a form of metabolism called fermentation Cell division Divides by binary fission Asexual reproduction
1.3.2 Eukaryotes Cell structure Nucleus Nuclear membrane Cytoplasm Ribosomes Smooth E. R. Golgi apparatus Rough E. R. Micro tubules Lysosomes Pila
1.3.3 bacteria, archaea, protozoa, unicellular algae and unicellular fungi.
1.3.4 All the functions of life are carried out in that one cell 7 functions of life: Nutrition, metabolism, growth, adaptation, excretion, homeostasis, reproduction
1.4 3. Multicellular organisms
1.4.1 animals, land plants and filamentous fungi are multicellular, as are many algae
1.4.2 The first evidence of multicellularity is from cyanobacteria-like organisms that lived 3-3.5 billion years ago
1.4.3 Cell differentiation occurs numerous times during the development of a multicellular organism as the organism changes from a simple zygote to a complex system of tissues and cell types. Gene Expression All multicellular organisms in humans have the same set of genes Cell differentiation happens because a different sequence of gene is expressed in different cell types Specialization Specialized tissues can develop by cell differentiation e.g. Red blood cell carries oxygen Tissues are a group of specialized cells that perform the same function
1.4.4 Undifferentiated cell Stem cells Have the capacity to differentiate(produce different cell types), this is necessary for embryonic development Embryonic stem cells can be used to produce regenerated tissue for people with skin burns and other therapeutic uses Non-therapeutic: Use large amounts of muscle fibers for human consumption in animals can divide (through mitosis) to produce more stem cells
1.5 3. Microscopes
1.5.1 Electron Resolution is 1 nanometer Reveals the ultrastructure of cells
1.5.2 Light Maximum resolution is 200 nanometers Reveals the cells structure
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