Biological Classification

Which of the following shows coiled RNA strand and capsomeres?

1. Polio virus
2. Tobacco mosaic virus
3. Measles virus
4. Retrovirus

Viruses have

1. DNA enclosed in a protein coat
2. prokaryotic nucleus
3. single chromosome
4. both DNA and RNA.

Archaebacteria differ from eubacteria in

1. cell membrane structure
2. mode of nutrition
3. cell shape
4. mode of reproduction.

Anoxygenic photosynthesis is characteristic of

1. Rhodospirillum
2. Spirogyra
3. Chlamydomonas
4. Ulva.

Which one of the following fungi contains hallucinogens?

1. Morchella esculenta
2. Neurospora sp.
3. Amanita muscaria
4. Ustilago sp.

A location with luxuriant growth of lichens on the trees indicates that the :

1. trees are very healthy
2. trees are heavily infested
3. location is highly polluted
4. location is not polluted

Which of the following are likely to be present in deep sea water?

1. Blue-green algae
2. Saprophytic fungi
3. Archaebacteria
4. Eubacteria

Which one of the following is true for fungi?

1. They lack a rigid cell wall.
2. They are heterotrophs.
3. They lack nuclear membrane.
4. They are phagotrophs.

Satellite RNA are present in some :

1. Prions
2. Bacteriophages
3. Plant viruses
4. Viroids

Specialized cells for fixing atmospheric nitrogen in Nostoc are

1. heterocysts
2. hormogonia
3. nodules
4. akinetes