Introduction to Endoplasmic Reticulum
The endoplasmic reticulum (ER) is a vital cellular organelle involved in the synthesis, folding, modification, and transport of proteins and lipids. It exists in two forms: rough ER (RER), characterized by ribosomes on its surface, and smooth ER (SER), which lacks ribosomes. Each type plays distinct roles in cellular metabolism and function.
Differences Between Smooth and Rough Endoplasmic Reticulum
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FAQs on Understanding Smooth and Rough Endoplasmic Reticulum
1. What are 3 differences between the rough and smooth endoplasmic reticulum?
The rough endoplasmic reticulum (RER) has ribosomes on its surface, synthesizes proteins, and is composed of flattened sacs. In contrast, the smooth endoplasmic reticulum (SER) lacks ribosomes, synthesizes lipids, and consists of a network of tubules.
2. What is the function of the smooth endoplasmic reticulum?
The smooth endoplasmic reticulum is responsible for lipid synthesis, metabolism of carbohydrates, detoxification of drugs and poisons, and storage of calcium ions.
3. What are three jobs for smooth ER?
The smooth ER synthesizes lipids, detoxifies harmful substances, and stores calcium ions.
4. What is the full name of RER and SER?
RER stands for Rough Endoplasmic Reticulum, and SER stands for Smooth Endoplasmic Reticulum.
5. Which are the functions of rough ER?
The rough ER is involved in the synthesis and folding of proteins, particularly those destined for secretion or insertion into cellular membranes.
6. What is the main function of the smooth endoplasmic reticulum?
The main function of the smooth endoplasmic reticulum is the synthesis of lipids.
7. Does the peroxisome have DNA?
No, peroxisomes do not contain DNA; they are involved in lipid metabolism and chemical detoxification.
8. What is the Golgi body?
The Golgi body, or Golgi apparatus, is an organelle responsible for modifying, sorting, and packaging proteins and lipids for secretion or delivery to other organelles.
9. What is lysosome short answer?
A lysosome is a membrane-bound organelle containing enzymes that break down and recycle cellular waste and debris.
10. Who discovered the endoplasmic reticulum?
The endoplasmic reticulum was first observed by Keith R. Porter, Albert Claude, and Ernest F. Fullam in 1945.
