A) membrane bound nucleus
B) complex membranous internal organ
C) gas vesicle
D) mRNA in trons
Correct Answer: C
Solution :
A eukaryote is an organism whose cells contain complex structures enclosed within membranes. It contains a clearly defined nucleus enclosed by a membrane, along with organelles (mitochondria, chloroplasts, Golgi apparatus, endoplasmic rericulum and lysosomes). All organisms except bacteria and archae are eukaryotes. Gas vesicle is a hollow structure made of protein. It usually has the form of a cylindrical tube closed by conical end caps. Gas vesicle occur in five phyla of the bacteria and two groups of the archae, they are mostly restricted to planktonic microorganisms, in which they provide buoyancy.
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