Which of the following statement about viruses is correct ?
Viruses are obligate parasites
Viruses contain both RNA and DNA
Nucleic acid of viruses is known as capsid
Viruses possess their own metabolic system
A.
Viruses are obligate parasites
Viruses produce characteristic symptoms on the host. They also behave as living organisms inside the host tissue. These are nucleoprotein particles having DNA or RNA as genetic material. Hence, they are known as they are called intra-cellular obligate parasite.
The virus, that infects bacteria, are made up of:
Protein only
RNA and protein
DNA and lipid
DNA and protein
The usage of binomial names, for plant species, was accepted by all after the publication of the works by :
Hooker
Linnaeus
Bentham
Darwin
The cell organelles are found in
bacterial cells
cyanobacterial cells
prokaryotic cells
eukaryotic cells
How many sub-phyla are available in Tracheata, according to Tippo's classification of kingdom Plantae ?
4
6
8
10
Viroids have
single stranded RNA not enclosed by protein coat
single stranded DNA not enclosed by protein coat
double stranded DNA enclosed by protein coat
double stranded RNA enclosed by protein coat
In which book, Bentham and Hooker proposed their classification?
Genera Plantarum
Species Plantarum
Historia Plantarum
Historia Naturae
Intracellular compartments are not found in the cells of
lower plants
prokaryotes
higher plants
eukaryotes
Which one of the following is also called halophiles
Eubacteria
Actinomycetes
Archaebacteria
Cyanobacteria
