Difference between prokaryotic and eukaryotic cell
S. No. Characterstics Prokaryotic cell Eukaryotic cell 1 Cell Size The cell size is usually small. The cell size is comparatively larger 2 Nucleus Nuclear region is poorly defined due…
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Cell Theory
In 1838, Matthias Schleiden, a German botanist, examined a large number of plants and observed that all plants are composed of different kinds of cells which form the tissues of…
Brown or leaf rust of wheat
Puccinia triticina (P. recondita) DISEASE: Leaf or Brown rust PATHOGEN: Puccinia triticina (Syn. Puccinia recondita f. sp. tritici) HOSTS: Wheat, barley and common Barberry (Berberis, Mahoberberis and Mahonia spp.) Symptoms…
Late Blight of Potato
The disease was recorded simultaneously in Europe and North America in 1830. It became very well established in Europe by 1842 and was one of the important causes of the…
Cyclic Nucleotide-Gated Ion Channels As Components Of Plant Immunity
It is almost certain that Ca2+ fluxes play a crucial role in the activation of defense responses. Induction of ROS and activation of mitogen-activated protein kinase cascades are two examples…
Inhibitors of eukaryotic transcription
Introduction Transfer of nucleotide language of DNA to the nucleotide language of RNA, with the replacement of T by U. The process has been catalyzed by the enzyme DNA dependent…
Plant Cell Wall
A novelty song of more than 50 years ago listed food items the writer said he disliked. Each verse ended with the line, “I like bananas because they have no…
Simple and Differential Staining
STAINING METHODS INTRODUCTION Staining is technique used in microscopy to enhance contrast in the microscopic image. Stains and dyes are frequently used in biological tissues for viewing, often with the…
Indus Valley Civilization ( 2500 B.C.E. )
Roots of Indus Valley Civilization •Earliest civilizations in Indus Valley was discovered in 1856 by a railroad crew. –Harappa –Mohenjo-Dara or “Hill of the Dead” –Both cities shared urban design…
Chakradatta
Chakradatta is one of the important treatises composed by Acharya Chakrapani Datta. The well known Tikakarta of Charak Samhita, actually this book is named as ‘Chikitsa sangraha’ by the author,…