Biological Classification · Question 29

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.

Methanogens belong to

1. eubacteria
2. archaebacteria
3. dinoflagellates
4. slime moulds.

Select the wrong statement.

1. The walls of diatoms are easily destructible.
2. 'Diatomaceous earth' is formed by the cell walls of diatoms.
3. Diatoms are chief producers in the oceans.
4. Diatoms are microscopic and float passively in water.

Which one is a wrong statement?

1. Haploid endosperm is typical feature of Gymnosperms.
2. Brown algae have chlorophyll a and c and fucoxanthin.
3. Archegonia are found in Bryophyta, Pteridophyta and Gymnosperms.
4. Mucor has biflagellate zoospores.

Select the wrong statement.

1. The term ' contagium vivum fluidum' was coined by M. W. Beijerinck.
2. Mosaic disease in tobacco and AIDS in human being are caused by viruses.
3. The viroids were discovered by D.J. Ivanowsky.
4. W.M. Stanley showed that viruses could be crystallised.

In which group of organisms the cell walls form two thin overlapping shells which fit together?

1. Dinoflagellates
2. Slime moulds
3. Chrysophytes
4. Euglenoids

Pick up the wrong statement.

1. Some fungi are edible.
2. Nuclear membrane is present in Monera.
3. Cell wall is absent in Animalia.
4. Protists have photosynthetic and heterotrophic modes of nutrition.