Number of chromatids at metaphase is
Two each in mitosis and meiosis
Two in mitosis and one in meiosis
Two in mitosis and four in meiosis
One in mitosis and two in meiosis
Lampbrush chromosomes occur during
Prophase of mitosis
Diplotene of meiosis
Metaphase of meiosis
Interphase
Which one of the following precedes reformation of the nuclear envelop during M-phase of the cell cycle?
Decondensation from chromosomes and reassembly of the nuclear laminas
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
Best stage to observe shape , size and number of chromosomes is
Metaphase
Prophase
Telophase
Name of Schleiden and Schwann are associated with
Protoplasm as the physical basis of life
Cell theory
Theory of cell lineage .
Nucleus functions as control centre of cell
Flagella of prokaryotic and eukaryotic cells differ in
Type of movement and placement in cell
Location in cell and mode of functioning
Microtubular organization and type of movement
Microtubular organization and function .
The prokaryotic flagella possess
Unit membrane enclosed fibre
Protein membrane enclosed fibre
' 9 + 2 ' membrane enclosed structure
Helically arranged protein molecules
In calivary gland chromosomes / polytene chromosomes pairing is
Absent
Occasional
Formed between non-homologous chromosomes
Formed between homologous chromosomes
Which is correct about cell theory in view of current status of our knowledge about cell structure?
It needs modification due to discovery of sub cellular structures like chloroplasts and mitochondria.
Modified cell theory means that all living beings are composed of cells capable of reproducing .
Cell theory does not hold good because all living being do not have cellular organization ( eg , viruses ).
Cell theory means that all living objects consist of cells whether or not capable of reproducing.
A student wishes to study the cell structure under a light microscope having 10X eyepiece and 45X objective . He should illuminate the object by which one of the following colours of light so as to get the best possible resolution?
Blue
Green
Yellow
Red
