One of the major components of cell wall of most fungi is :
1. Hemicelluloses
2. Chitin
3. Peptidoglycan
4. Cellulose

The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the:
1. Eubacteria
2. Halophiles
3. Thermoacidophiles
4. Methanogens

Which of the following statements is wrong for viroids?
1. Their RNA is of high molecular weight
2. They lack a protein coat
3. They are smaller than viruses
4. They cause infections

Methanogens belong to
1. Slime moulds
2. Eubacteria
3. Archaebacteria
4. Dinoflagellates

Select the wrong statement.

Select the mismatch.
1. Methanogens-Prokaryotes
2. Gas vacuoles-Green bacteria
3. Large central vacuoles-Animal cells
4. Protists-Eukaryotes

Which of the following rRNAs acts as structural RNA as well as ribozyme in bacterial?
1. 5-8s rRNA
2. 5S rRNA
3. 18 S rRNA
4. 23S rRNA

Study the four statements (A – D) given below and select the two correct ones out of them:
A. Definition of biological species was given by Ernst Mayr.
B. Photoperiod does not affect reproduction in plants.
C. Binomial nomenclature system was given by R. H. Whittaker.
D. In unicellular organisms, reproduction is synonymous with growth.
The two correct statements are
1. A and B
2. B and C
3. C and D
4. A and D

Which among the following are the smallest living cells known without a definite cell wall that are pathogenic to plants as well as animals and can survive without oxygen?
1. Bacillus
2. Pseudomonas
3. Mycoplasma
4. Nostoc

Which of the following are found in extreme saline conditions?
1. Archaebacteria
2. Eubacteria
3. Cyanobacteria
4. Mycobacteria