Prepare for NEET with Botany-specific practice questions. Covering all major Botany chapters, this is perfect for your NEET Biology needs.
Organisms having either peptide Bonds or phosphodiester Bonds but not Both
I) Viroids II) Viruses III) Prions IV) Bacteria
I, II
III, IV
II, III
I, III
The viruses are non cellular organisms that are charactarised by
Absence of Nucleic acid
An active structure outside the living cell
An inert crystalline structure outside the cell
Their hyper activity outside the cell
T.O. Diener discovered a new infections agent that was smaller than viruses and having following characteristics.
I) It causes potato spindle tuber disease
II) It has free RNA
III) Molecular weight of RNA is low
Which is the correct option far all the given characteristics?
Viruses
Viroids
Virion
Mycoplasma
Which of the following statements 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 men
Organisms having either peptide Bonds or phosphodiester Bonds but not Both
I) Viroids II) Viruses III) Prions IV) Bacteria
I and II
I and III
II and IV
III and IV
Statement 1: Viruses cause diseases and replicate when they are in the host.Statement 2: Viruses do not replicate outside the host, but they remain alive.
Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1
Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1
Statement 1 is True, Statement 2 is False
Statement 1 is False, Statement 2 is True
