Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Viruses
Viruses are sub cellular, ultramicroscopic infectious agents of 20 nm-300 nm size range Many of them cause diseases like polio, dengue, small pox, measles, rabies, common cold etc., in animals and mosaic, dwarfing, curling etc. in plants. They are obligate intracellular parasites. In other words, they multiply only inside living cells. They consist of a protein coat or capsid surrounding a nucleic acid core of either DNA or RNA.Viruses were discovered in 1892 by a Russian biologist Iwanowsky, as'filter-passing agents' though they were seen much later, with the advent of electron microscope.
They share certain characteristics of both living and non-living things. So it will be useful to examine the properties of viruses. They are considered living because they can reproduce even though only when they are inside host cells, using the host cell machinery. On the other hand, they have some nonliving properties as well. When they are outside the host cell they can also undergo crystallisation like any other chemical substance. They do not have metabolism and so are metabolically inert. They cannot take up metabolic substances from the environment and lack the biochemical machinery like ribosomes or ATP generating systems to synthesize nucleic acid and proteins. They do not have their own enzyme system. They also do not exhibit growth or respond to stimuli.
Explain Entecavir Entecavir (Baraclude) taken orally once a day as monotherapy appears to be superior to lamivudine for patients with chronic HBV infection, but susceptibili
Resonance Frequency Analysis Resonance Frequency Analysis: A non invasive device based on the principles of resonance frequency analysis (RFA) has been developed to measure pri
what is the latest classification of fungi
Standards of Psychiatric Nursing: By 1956, the Masters programme was extended to two academic years. Some nurses established private practices with psychiatric patients. It
Explain the difference among a sex-linked trait and a sex-influenced trait. A sex-influenced trait is influenced by the presence of sex hormones and its genes are not situated
Describe the Applications of vitamin b1 The steadily increasing consumption of white flours (insufficiently ground and thus low in vitamin content) by large sections of the po
Explain the Dietary Modifications - Obesity? The dietary modifications serve as a guide for the obese to make healthy food choices. The first step towards prescribing a diet fo
State the Goals of neuropsychological assessment The psychological domains/processes/ components are mediated by specific brain structures and connected brain structures formin
What are the main structures within the cell nucleus? Within the cell nucleus the major structures are: the nucleolus, an optically dense region, spherical shaped, where there
Q. Qualitative and Quantitative Analysis of Colour? Primarily, two types of analysis are carried out for food colours - qualitative and quantitative. The qualitative analysi
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd