1
Which of the following is an incorrect statement?
- Nuclear pores act as passages for proteins and RNA molecules in both directions between nucleus and cytoplasm
- Mature sieve tube elements possess a conspicuous nucleus and usual cytoplasmic organelles
- Microbodies are present both in plant and animal cells
- The perinuclear space forms a barrier between the materials present inside the nucleus and that of the cytoplasm
Answer
(2) Mature sieve tube elements possess a conspicuous nucleus and usual cytoplasmic organelles
Solution
As per NCERT, a mature sieve tube element possesses a peripheral cytoplasm and a large vacuole but lacks a nucleus; its functions are controlled by the nucleus of the companion cell.
∴ Statement (2) is incorrect.
Statements (1), (3) and (4) are correct: nuclear pores allow two-way movement of RNA and proteins, microbodies occur in both plant and animal cells, and the perinuclear space (between the two nuclear membranes) acts as a barrier between nucleus and cytoplasm.
Answer: (2)
NEET (UG) 2021