Proteins that lack a sorting signal remain as permanent residents of which part of a eukaryotic cell? OA. The Golgi OB. The lysosome C. The endoplasmic reticulum OD. The cytoplasm OE. The nucleus
Structure and Composition of Cell Membrane
Despite differences in structure and function, all living cells in multicellular organisms are surrounded by a cell membrane. Just like the outer layer of the skin separates the body from its environment similarly, the cell membrane, also known as 'plasma membrane,' separates the inner content from its exterior environment.
Cell Membrane
The cell membrane is known by different names like plasma membrane or cytoplasmic membrane, or biological membrane. The term "cell membrane" was first introduced by C. Nageli and C. Cramer in the year 1855. Later on, in 1931, the term "plasmalemma" for cell membrane was given by J. Plowe. The cell membrane separates the cell's internal environment from the extracellular space. This separation allows the protection of cells from their environment.
Prokaryotes vs Eukaryotes
The cell is defined as the basic structural and functional unit of life. The cell membrane bounds it. It is capable of independent existence.
![QUESTION 25
Proteins that lack a sorting signal remain as permanent residents of which part of a eukaryotic cell?
OA. The Golgi
OB. The lysosome
OC. The endoplasmic reticulum
OD. The cytoplasm
O E. The nucleus
QUESTION 26
How are integral membrane proteins thought to become integrated with a membrane?
OA. They insert into the membrane at the same time as they are packaged into a COPII vesicle.
OB. They insert into the membrane after translation is complete and the stop sequence is detected.
OC. The are co-translationally imported into the ER by the translocon, which opens when it detects a stop transfer sequence to release the
protein into the membrane.
OD.
They are implanted in the lipid bilayer by a flipase enzyme.
QUESTION 27
Which cellular process does NOT occur in the smooth endoplasmic reticulum?
OA. Calcium storage
OB. Drug detoxification
OC.O-linked glycosylation
OD. Carbohydrate metabolism
OE. Steroid biosynthesis](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc9819384-7ac8-4a35-b95a-106c2e89eec6%2F2def11c0-0849-4a07-beb8-9c1d9ad6da92%2Fosy00yg_processed.jpeg&w=3840&q=75)
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