Question

Read the following statement and choose the incorrect one

$\bigcirc$ The size of nuclear pore is 300 to 1000 $\mathring{A}$ diameter.

$\bigcirc$ The inner side of nuclear membrane is lined by nuclear lamina.

$\bigcirc$ Chromatin fibers contain genetic information and condense to form constant number of chromosome during cell division.

$\bigcirc$ Nuclear pore is guarded by structure of tubulin protein called as pore complex.

• A. The size of nuclear pore is 300 to 1000 $\mathring{A}$ diameter.
• B. The inner side of nuclear membrane is lined by nuclear lamina.
• C. Chromatin fibers contain genetic information and condense to form constant number of chromosome during cell division.
• D. Nuclear pore is guarded by structure of tubulin protein called as pore complex.

Answer 1

Answer: (D)

Nuclear pore is guarded by structure of tubulin protein called as pore complex.

Answer 2

The nuclear pore complex (NPC) facilitates transport across the nuclear envelope. It is a large protein assembly made of nucleoporins (Nups). Tubulin is a protein that forms microtubules, a component of the cytoskeleton, and is not involved in the structure or guarding of nuclear pores. Therefore, the statement claiming nuclear pores are guarded by tubulin is incorrect.