Question

An undefined or undifferentiated fibrillar nucleus is seen in:

• A. Eukaryotic cells
• B. Prokaryotic cells
• C. Cells of higher organisms
• D. Cells of higher plants

Answer 1

The correct option is B Prokaryotic cells

Prokaryotic cell means a cell having "pro" or "primitive karyon". The term karyon refers to the cell centre or cell nucleus. Prokaryotes do not have a well developed nucleus. Prokaryotic nucleus lacks a well defined nuclear membrane, nuclear pores, nucleoplasm, nucleolus, chromatin material, linear chromosomes etc. Instead it consists of a single circular DNA that forms the genetic material.

So, the correct answer is 'Prokaryotic cells'