Inner membrane convolutions of a mitochondrion are known as
lamellae
thylakoids
grana
cristae
In salivary 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 subcellular structure 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 organisation (example : viruses)
Cell theory means that all living objects consist of cells whether or not capable of reproducing.
Which of the following occurs more than one and less than five in a chromosome?
Chromatid
Chromosome
Centromere
Telomere
Binding of specific protein on regulatory DNA sequence can be studied by means of
ultra centrifugation
electron microscope
light microscope
X-rays crystallography
Cell recognition and adhesion occur due to biochemicals of cell membranes named
proteins
lipids
proteins and lipids
glycoproteins and glycolipids
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
The prokaryotic flagella possess
unit membrane enclosed fibre
protein membrane enclosed fibre
'9 + 2' membrane enclosed structure
helically arranged protein molecule
Poly ribosomes are aggregates of
ribosomes and rRNA
only rRNA
peroxisomes
several ribosomes held together by string of mRNA
Organelle / organoid involved in genetic engineering is
plasmid
mitochondrion
Golgi apparatus
lomasome
