EVERYDAY SCIENCE

SCIENCE

CELL BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is NOT TRUE about the cell membrane?
A
It controls what enters and leaves the cell
B
Semipermeable
C
Phospholipid bilayer
D
Contains digestive enzymes
Explanation: 

Detailed explanation-1: -A lysosome is a membrane-bound cell organelle that contains digestive enzymes. Lysosomes are involved with various cell processes. They break down excess or worn-out cell parts. They may be used to destroy invading viruses and bacteria.

Detailed explanation-2: -Lysosomes are membrane-enclosed organelles that contain an array of enzymes capable of breaking down all types of biological polymers-proteins, nucleic acids, carbohydrates, and lipids.

Detailed explanation-3: -A lysosome (/ˈlaɪsəˌsoʊm/) is a membrane-bound organelle found in many animal cells. They are spherical vesicles that contain hydrolytic enzymes that can break down many kinds of biomolecules. A lysosome has a specific composition, of both its membrane proteins, and its lumenal proteins.

Detailed explanation-4: -They cannot digest themselves due to the glycocalyx protective layer. It is formed by the carbohydrate moiety of the membrane proteins and lipids. The membrane protein and lipid are highly glycosylated as a result making it resistant to digestion by hydrolases and protecting the phospholipid bilayer.

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