Biological Classification

Ciliates differ from all other protozoans in

1. having a contractile vacuole for removing excess water
2. having two types of nuclei
3. using flagella for locomotion
4. using pseudopodia for capturing prey

Which of the following are found in extreme saline conditions?

1. Eubacteria
2. Cyanobacteria
3. Mycobacteria
4. Archaebacteria

Viroids differ from viruses in having

1. DNA molecules without protein coat
2. RNA molecules with protein coat
3. RNA molecules without protein coat
4. DNA molecules with protein coat

Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?

1. Pseudomonas
2. Mycoplasma
3. Nostoc
4. Bacillus

The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the

1. methanogens
2. eubacteria
3. halophiles
4. thermoacidophiles.

Which one of the following statements is wrong?

1. Eubacteria are also called false bacteria.
2. Phycomycetes are also called algal fungi.
3. Cyanobacteria are also called blue-green algae.
4. Golden algae are also called desmids.

Which of the following statements is wrong for viroids?

1. They cause infections.
2. Their RNA is of high molecular weight.
3. They lack a protein coat.
4. They are smaller than viruses.

One of the major components of cell wall of most fungi is

1. cellulose
2. hemicellulose
3. chitin
4. peptidoglycan.

Chrysophytes, Euglenoids, Dinoflagellates and Slime moulds are included in the Kingdom

1. Fungi
2. Animalia
3. Monera
4. Protista.

Which one of the following is wrong for fungi?

1. They are eukaryotic.
2. All fungi possess a purely cellulosic cell wall.
3. They are heterotrophic.
4. They are both unicellular and multicellular.