Biological Classification And System Of Classification Question 32
Prokaryotes are characterized by the absence of a nucleus and other membrane-bound organelles
[AFMC 1993]
Options:
A) A true nucleus with double layered nuclear membrane is absent
B) Well developed nucleus with double layered nuclear membrane present
C) Presence of cell wall made of chitin, mucopolysaccharides and absence of cell organelles like mitochondria and chloroplasts
D) Autotrophic in nature and only DNA is present in their cells
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Answer:
Correct Answer: C
Solution:
Prokaryotes lack membrane bound organelles like nucleus, mitochondria and chloroplast.
Prokaryotic cells are unicellular organisms, which reproduce through binary fission. Budding is not a method of reproduction used by prokaryotic organisms.
Prokaryotic cells have a cell envelope, which generally consists of a capsule, cell wall (peptidoglycan), cytoplasm, plasma membrane, nucleoid region, ribosome, plasmids, pili and flagella.
They are autotrophs, phototrophs, chemotrophs, and heterotrophs.
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