Biological Classification And System Of Classification Question 32
Question: Prokaryotes are characterized by
[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 chitins, mucopolysaccharides and absence of cell organelles like mitochondria and chloroplasts
D) Autotrophic in nature and only DNA is present
Show Answer
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. In some cases, few prokaryotic organisms also reproduce by budding.
Prokaryotic cells have a cell envelope, which generally consists of a capsule, cell wall (chitin and mucopolysaccharides), cytoplasm, plasma membrane, cytoplasm region or nucleoid region, ribosome, plasmids, pili and flagella.
They are autotrophs, phototrophs, chemotrophs and heterotrophs.
BETA
