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Tuesday, 27 June 2017

Difference between Animal and Plant cells

Animal cells Vs. Plant cells

Points of comparison
Animal cell
Plant cell
Shape
Irregular due to possessing only cell membrane
Rigid in shape due to cell wall which consist of compounds that give the cell wall its rigidity
Organelles
Has centrioles, and lysosomes
Small vacuoles relative to those found in plant cells
Lack chloroplasts and cell wall
Has chloroplast( organelle containing pigment chlorophyll which gives the plants their green color), cell wall and central large vacuole.
Lack centrioles
Totipotency
Only special types of cells can regenerate or differentiate to specific type of cells '' these cells are stem cells'' (Embryonic stem cells (Pluripotent) & somatic stem cells ( adult stem cells or multipotent stem cells)
Can originate a whole new complete plant from any single cell
Genes
All genes are found in all cells but not all of them are active e.g., Insulin-producing gene is active in the pancreas and inactive in your lung cells
All genes are active since they have the ability to regenerate from one single cells a complete plant ''Totipotency''
Metabolism
Animal cells cannot perform photosynthesis since they lack chloroplasts
Plants have one specific different process in their life cycle that no other organisms has it ''Beside some algae and bacterial strains''
Which is the photosynthesis due to chloroplasts
During mitotic cell division
In Prophase, a centrosome ( has 2 pairs of centrioles) is found near the nucleus. Each centriole moves to one end of the cell forming spindle fibers.
In Telophase, As the nucleus is now completely divided, the cytoplasm start to divide, a constriction appears & continues in the middle of the cell dividing it into 2 cells.
In Prophase, No centrioles are found. Spindle fibers are formed directly from the cytoplasm
In Telophase, No constriction, a middle lamella is formed to separate the formed cells. The middle lamella is in the form of a chain of fine vesicles followed by the precipitation of pectic compounds and then cellulose is followed forming the cell wall separating plant cells.
Nucleus
It is usually in the middle of the cell
It is usually not centered due to the relatively large size of the central vacuole taking up much space.
Starch granules
Absent - excess glucose is usually connected together in chains forming chains of glycogen which are stored in skeletal muscles and liver for later use
Present
Diagram








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