Question

question 4
what shape are the plasmid present in eubacteria?
linear
circular
nuclear
luminous

Explanation:

Plasmids in Eubacteria (true bacteria) are typically small, extrachromosomal DNA molecules that are circular in shape. Linear plasmids are more common in some eukaryotes or specific bacteria, nuclear refers to a cellular structure (not a DNA shape), and luminous relates to light emission, not DNA structure. So the correct option is the one with "circular".

Answer:

B. circular