Which of the following is an incorrect statement?

The correct answer is option 2.

Concept:

• The nucleus was discovered in 1831 by Robert Brown.
• It controls the activities of the cell and carries genetic information (chromosomes).
• It is present in eukaryotic cells; the prokaryotic cells lack a nucleus.

Explanation:

Let us see a few characteristic features of the nucleus:

• Perinuclear Membrane
  • The nucleus in eukaryotic cells is surrounded by a nuclear envelope consisting of two lipid bilayer membranes.
  • There is a space between these membranes which is called a perinuclear membrane.
  • It separates the substance present in the nucleus from the cytoplasm of the cell.
• Nuclear Pores
  • The nuclear envelope is interrupted at various places by minute pore-like structures.
  • It acts as a protein-lined channel.
  • It plays a major role in the transportation of substances between the nucleus and the cytoplasm of the cell.
• Enucleated cells
  • Some cells like the RBCs and sieve tube cells in plants don't have a nucleus. They are called enucleated cells.
  • Sieve tube cells form sieve tubes through which food is transported throughout the vascular plants.

So, the correct answer is option 2.

Additional Information:

• Microbodies are minute vesicles present in plant and animal cells.
• They carry different enzymes inside them.