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.
Which of the following statements is correct? Please select all that apply.
Parasitism between bacteria and archaea caused complex interactions that eventually gave rise to eukarya.
While bacteria are prokaryotes, archaea are neither prokaryotic, nor eukaryotic but classified as a 3rd cell type.
Prokaryotes are classified further based on whether they are unicellular or multicellular organisms.
The molecular biologies of archaea and eukarya show a greater proportion of similarities than those of eukarya and bacteria.
Prokaryotes could not make photosynthesis until chloroplast endosymbiosis evolution.
The last universal common ancestor most likely had a primitive prokaryotic cell organization.
Endosymbiosis of chloroplast precedes that of mitochondria.
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