Prepare for NEET with Botany-specific practice questions. Covering all major Botany chapters, this is perfect for your NEET Biology needs.
The genetic material of AIDS virus is
Double stranded DNA
Double stranded RNA
Single stranded RNA
Single stranded DNA
A virus differs from a bacterium as it contains
A cell wall
Cytosol
DNA as genetic material
DNA or RNA as genetic material with no ribosomes
Which of the following statement is not true for retroviruses?
DNA is not present at any stage in the life cycle of retroviruses
Retroviruses carry gene for RNA dependent DNA polymerase
The genetic material in mature retroviruses is RNA
Retroviruses are causative agents for certain kinds of cancer in man
Analyse the following statements and identify the correct option given below.
I. Viruses that infects plants have single-stranded RNA and viruses that infects animals have either single or double-stranded RNA or double stranded DNA
II. Bacterial viruses or bacteriophase are usually single-stranded RNA viruses
Codes
I is true, but II is false
I is false, but II is true
I and II are true
I and II are false
Prions differ from viroids as the former has/is
DNA as genetic material
Low molecular weight RNA
Proteinaceous in nature
Obligate parasite
Select the true one about prions
Has RNA as genetic material
Abnormally folded proteins
Larger than viruses
RNA shape is same as in TMV
Which of the given feature is true about the viroids?
They have DNA as main genetic material
They are discovered by T.O Diener
Capsomeres are present
Larger than viruses
Which of the given feature is true about the viroids?
They have DNA as main genetic material
They are discovered by T.O Diener
Capsomeres are present
Larger than viruses
In prokaryotic cell,
I. enveloped genetic material is present
II. ribosomes are absent
III. an organised nucleus is absent
The correct option is
Only I
Only II
Only III
I, II and III