Match the type of cytoskeleton protein to the structure, protein, or role by writing the correct letter in the blank. Microtubules Microfilaments Intermediate filaments _________ Position organelles _________ Are not dynamic _________ Profilin _________ Form the contractile ring _________ Composed of tubulin _________ Stabilized by Tau proteins _________ Associate with myosin motors _________ Have dynamic instability _________ Pull sister chromatid apart during mitosis _________ Arp2/3 _________ Associated with kinesin and dynein motors _________ Formed by most abundant cellular protein _________ Treadmilling
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.
Match the type of cytoskeleton protein to the structure, protein, or role by writing the correct letter in the blank.
- Microtubules
- Microfilaments
- Intermediate filaments
_________ Position organelles
_________ Are not dynamic
_________ Profilin
_________ Form the contractile ring
_________ Composed of tubulin
_________ Stabilized by Tau proteins
_________ Associate with myosin motors
_________ Have dynamic instability
_________ Pull sister chromatid apart during mitosis
_________ Arp2/3
_________ Associated with kinesin and dynein motors
_________ Formed by most abundant cellular protein
_________ Treadmilling
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