Short Answer Type
Multiple Choice QuestionsThe main difference between Gram positive and Gram negative bacteria is
cell membrane
cell wall
ribosome
mitochondria
What is a genophore?
DNA in prokaryotes
DNA and RNA in prokaryotes
DNA and protein in prokaryotes
RNA in prokaryotes
Electrons used in electron microscope are of the wavelength
0.05 Å
0.15 Å
0.25 Å
0.30 Å
A.
0.05 Å
In electron microscope the source of radiation is electrons of wavelength of about 0.05 Å (0.005 nm). The electrons are emitted and accelerated in a vaccum tube and the electron beam is deflected by electromagnetic coils acting as condensor, objective and projector lenses.
Which one of the following human cells do not contain mitochondria?
Nerve cell
Red blood cell
Liver cell
White blood cell
Which one of the following cells is not a phagocytic cell?
Macrophage
Monocyte
Neutrophil
Basophil
Numerical aperture of microscope lens is expressed by
angular aperture only
refractive index only
both angular aperture and refrative index
wave length of the light used
N-acetyl muramic acid is found in
cell wall component of plant
cell wall component of Gram positive bacteria
cell wall component of fungi
viral coat material
Identify the bacterium that appears violet after Gram staining
Salmonella enterica
Escherichia coli
Mycobacterium tuberculosis
Rhizobium meliloti
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