How are viroids different from viruses?
Viroids are free RNA molecules of low molecular weight without any protein coat while viruses can have either RNA or DNA molecules encapsulated in a protein coat. Viroids are smaller in size than viruses.
Popular Questions of Class 11 Biology
- Q:- Describe briefly the four major groups of Protozoa.
- Q:- Why are living organisms classified?
- Q:- State two economically important uses of: (a) Heterotrophic bacteria (b) Archaebacteria
- Q:- What is the difference between direct and indirect development?
- Q:-
Define a taxon. Give some examples of taxa at different hierarchical levels.
- Q:- Describe the important properties of enzymes.
- Q:-
What are the steps involved in formation of a root nodule?
- Q:- How is a key helpful in the identification and classification of an organism?
- Q:- Illustrate the taxonomical hierarchy with suitable examples of a plant and an animal.
- Q:- What is stomatal apparatus? Explain the structure of stomata with a labelled diagram.
Recently Viewed Questions of Class 11 Biology
- Q:- How would you distinguish monocots from dicots?
- Q:-
State the role of pancreatic juice in digestion of proteins.
- Q:- Why do we call our heart myogenic?
- Q:- Why is the colour of a leaf kept in the dark frequently yellow, or pale green? Which pigment do you think is more stable?
- Q:- What is meant by modification of root? What type of modification of root is found in the (a) Banyan tree (b) Turnip (c) Mangrove trees
- Q:-
What is meant by double circulation? What is its significance?
- Q:-
Which of the following is correct:
(a) Cells of all living organisms have a nucleus.
(b) Both animal and plant cells have a well defined cell wall.
(c) In prokaryotes, there are no membrane bound organelles.
(d) Cells are formed de novo from abiotic materials. - Q:- Give a brief account of the counter current mechanism.
- Q:- State the volume of air remaining in the lungs after a normal breathing.
- Q:-
Describe the role of liver, lungs and skin in excretion.
10 Comment(s) on this Question
This isn't a complete answer please edit it and keep a new one
Viroids causes disease only in plant...... But viruse causes disease both in plant and animals......
Viroids lack a protein coat whereas viruses have protein coat called capsid.......
Yes.....the length of the answer shud b more
Length of answer should be more
Thanks
Answer is short . Explain some more
Too short
Give some more information about this
Short answer
- NCERT Chapter