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.
Mitotic anaphase differs from metaphase in possessing
Same number of chromosomes and same number of chromatids
Half number of chromosomes and half number of chromatids
Half number of chromosomes and same number of chromatids
Same number of chromosomes and half number of chromatids
Balbiani rings (puffs ) are sites of
DNA replication
RNA and protein synthesis
Synthesis of polysaccharides
Synthesis of lipids
MeiosisII performs
Seperation of sex - chromosomes.
Synthesis of DNA and cen tromeres
Seperation of homologous chromosomes
Seperation of chromatids
The prokaryotic flagella possess
Unit membrane enclosed fibre
Protein membrane enclosed fibre
' 9 + 2 ' membrane enclosed structure
Helically arranged protein molecules
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 .
Membranous bag with hydrolytic enzymes which is used for controlling intracellular digestion of macromolecules is
Endoplasmic reticulum
Nucleosome
Lysosome
Phagosome
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
The eukaryotic genome differs from the prokaryotic genome because
DNA is complexed with histones in prokaryotes
Repetitive sequences are present in eukaryotes
Genes in the former cases are organized into operons
DNA is circular and single stranded in prokaryotes
