Which one is not right about plasmid?
A. It is extra-chromosomal genetic material；
B. It is closed circular double stranded DNA chain；
C. Its loss will result in death of bacterial cells.
D. It carries genetic information for drug-resistance;
Which one is right about bacterial nucleoid?
A. It is an area for bacterial chromosome DNA,
B. It is surrounded by the nuclear membrane;
C. It is a specific area of harbouring plasmid;,
D. It is limited by mesosome;
Which statement is not true about mesosome of bacterium?
A. It is equivalent to a mitochondria for synthesis of energy in bacteria;
B. It work as a spindle that mediates cell division ;
C. It increases membrane area,
D. It functions as receptors.
Mesosome is found in which one of following structures?
A. cell wall
B. cell membrane
C. chromosome
D. capsule
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