CIE A Level Biology复习笔记1.2.4 Prokaryotic v Eukaryotic Cells

Structural Features of Typical Prokaryotic Cells

  • Animal and plant cells are types of eukaryotic cells, whereas bacteria are a type of prokaryote
  • Prokaryotes have a cellular structure distinct from eukaryotes:
    • Their genetic material is not packaged within a membrane-bound nucleus and is usually circular (eukaryotic genetic material is packaged as linear chromosomes)
    • Prokaryotes lack membrane-bound organelles
    • They are many (100s/1000s) of times smaller than eukaryotic cells
    • Their ribosomes are structurally smaller (70 S) in comparison to those found in eukaryotic cells (80 S)

Cell-Components-Prokaryotic-cell

Prokaryotic cells are often described as being ‘simpler’ than eukaryotic cells, and they are believed to have emerged as the first living organisms on Earth

Prokaryotic v Eukaryotic Cell Structures

Prokaryotic & Eukaryotic Cells Comparison Table

Comparison-of-Prokaryotes-Eukaryotes-table

 

 

 

 

 

 

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