Question:
Term plasmalemma was given by
Term plasmalemma was given by
Updated On: Jul 28, 2022
- Strasburger
- Plowe
- Hooke
- Robertson
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The Correct Option is B
Solution and Explanation
The term plasma membrane was originally used by Nageli and Cramer $(1855)$ for the membranous covering of the protoplast. The same was named plasmalemma by Plowe $(1931)$. Plasmalemma or plasma membrane was discovered by Schwann $(1838)$. Membranes also occur inside the cytoplasm of eukaryotic cells as covering of several cell organelles like nucleus, mitochondria, plastids, lysosomes, Golgi bodies, peroxisomes, etc.
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Concepts Used:
Prokaryotic Cells
Prokaryotic cells are single-celled microorganisms known to be the earliest on earth. Prokaryotes include Bacteria and Archaea. The photosynthetic prokaryotes include cyanobacteria that perform photosynthesis.
A prokaryotic cell contains a single membrane and therefore, all the reactions occur within the cytoplasm. They can be free-living or parasites.
Characteristics of Prokaryotic Cell:
Prokaryotic cells have different characteristic features such as:
- Lack of a nuclear membrane.
- Absence of Mitochondria, Golgi bodies, chloroplast, and lysosomes.
- Presence of genetic material on a single chromosome.
- Lack of histone proteins in the constituents of eukaryotic chromosomes.
- The cell wall is made up of carbohydrates and amino acids.
- The plasma membrane acts as the mitochondrial membrane carrying respiratory enzymes.