Prepare for NEET with Botany-specific practice questions. Covering all major Botany chapters, this is perfect for your NEET Biology needs.
Which statement BEST describes the relationship between the nuclear envelope and the endoplasmic reticulum?
The nuclear envelope is entirely separate from the endoplasmic reticulum.
The inner membrane of the nuclear envelope is continuous with the smooth ER membrane.
The outer membrane of the nuclear envelope is continuous with the rough ER membrane.
The nuclear envelope is formed by invaginations of the Golgi apparatus.
In which phase of mitosis does the nuclear envelope begin to reform around the separated chromosomes?
Prophase
Metaphase
Anaphase
Telophase
I. Chromosomes cluster at opposite spindle poles their identity is lost as discrete elements
II. Nuclear envelope assembles around the chromosome clusters
III. Nucleolus, Golgi complex and ER reform
Above features indicates which phase of mitosis
Anaphase
Telophase
Cytokinesis
S-phase
The complete disintegration of nuclear envelope in a cell cycle marks the
Start of prophase of mitosis
Start of metaphase of mitosis
End of anaphase of mitosis
Start of telophase of mitosis
‘XX’ is a phase of mitosis, in which the chromatin condenses into discrete chromosomes. During ‘XX’ phase, nuclear envelope breaks down and spindles forms at opposite ends of the cell
Identify ‘XX’
Interphase
Anaphase
Telophase
Prophase
Which one of the following precedes re-formation of the nuclear envelope during M-phase of the cell cycle?
Decondensation from chromosome and reassembly of the nuclear lamina
Transcription from chromosomes and reassembly of the nuclear lamina
Formation of the contractile ring and formation of the phragmoplast
Formation of the contractile ring and transcription from chromosomes
Which of the following is an incorrect statement?
The perinuclear space forms a barrier between the materials present inside the nucleus and that of the cytoplasm
Nuclear pores acts 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
