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
The exchange of genetic material between chromatids of paired homologous chromosomes during first meiotic division is called
Transformation
Chiasmata
Crossing over
Synapsis
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
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
MeiosisII performs
Seperation of sex - chromosomes.
Synthesis of DNA and cen tromeres
Seperation of homologous chromosomes
Seperation of chromatids
Meiosis has evolutionary significance because it results in
Genetically similar daughters
Four daughter cells
Eggs and sperms
Recombinations
The cell organelle involved in glycosylation of protein is
Ribosome
Peroxisome
Endoplasmic reticulum
Mitochondria
Best stage to observe shape , size and number of chromosomes is
Interphase
Metaphase
Prophase
Telophase
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
Oxysomes or Fo - F1 particles occur on
Thylakoids
Mitochondrial surface
Inner mitochondrial membrane
Chloroplast surface