Give the differences between SER and RER.
GeneralClass 12AllAnswered 27 Mar 2026
Answer
|
Feature |
Smooth ER (SER) |
Rough ER (RER) |
|
Ribosomes |
Absent |
Present (attached to cytoplasmic surface) |
|
Appearance |
Tubular network |
Flattened cisternae (sacs) |
|
Primary function |
Lipid synthesis (phospholipids, steroids) |
Protein synthesis (secretory and membrane proteins) |
|
Abundance |
High in steroid-producing cells (adrenal cortex, gonads, liver) |
High in protein-secreting cells (pancreatic cells, plasma cells) |
|
Additional roles |
Detoxification (liver), Ca²⁺ storage (muscle), glycogen metabolism |
Protein folding, glycosylation, transport to Golgi |
Both form a continuous membrane system and work coordinately in cellular metabolism.
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