Question

The interphase dinoflagellate nucleus contains

• A. No chromatin reticulum
• B. Condensed chromosomes
• C. Acentric chromosomes
• D. All of the above

Answer 1

Answer: (D)

All of the above

• Dinoflagellate nuclei (dinokarya) have long fascinated cell biologists because of their bizarre features. They contain some of the largest eukaryotic genomes, housed in dozens to hundreds of chromosomes that remain permanently condensed throughout the cell cycle.
• Many exhibits a form of closed mitosis (dinomitosis) wherein the nuclear envelope (NE) invaginates to form one or more trans-nuclear tunnels. Rather than contact spindles directly, the chromatids (lack of centrosome) then bind to membrane-based kinetochores on the NE.

So the correct answer is option D.