1 How does the endomembrane system contribute to the overall organization and function of eukaryotic cells?
It facilitates compartmentalization, specialization, and coordination of cellular processes, including synthesis, modification, and transport of molecules.
2What is the endomembrane system?
It is a collection of membranes inside a eukaryotic cell that compartmentalizes the cell into functional and structural organelles.
3Which organelles are part of the endomembrane system?
The endoplasmic reticulum, Golgi apparatus, lysosomes, vacuoles, and vesicles.
4What is the function of the endoplasmic reticulum (ER) in the endomembrane system?
The ER is involved in protein and lipid synthesis, as well as the transport of molecules within the cell.
5What are the two types of endoplasmic reticulum?
Rough endoplasmic reticulum (RER) and smooth endoplasmic reticulum (SER).
65. How does the rough endoplasmic reticulum (RER) differ from the smooth endoplasmic reticulum (SER)?
RER has ribosomes attached to its surface, giving it a rough appearance, while SER lacks ribosomes and appears smooth.
76. What is the function of the Golgi apparatus in the endomembrane system?
The Golgi apparatus modifies, sorts, and packages proteins and lipids for secretion or delivery to other organelles.
8What are lysosomes, and what is their role in the endomembrane system?
Lysosomes are membrane-bound organelles containing enzymes that break down macromolecules and cellular debris for recycling.
9What is the function of vacuoles in the endomembrane system?
Vacuoles store materials such as water, nutrients, and waste products, and they also play roles in maintaining turgor pressure and cell structure.
10What are vesicles, and how do they function in the endomembrane system?
Vesicles are small membrane-bound sacs that transport materials within the cell, including proteins, lipids, and other molecules.
11What enzyme is found in lysosomes?
Hydrolases
12What protein carrier specific to the function of lysosomes is found in their membranes and why?
H+ pump to maintain the acidic conditions necessary for the hydrolases