Which statement is wrong for viruses
1. All are parasites
2. All of them have helical symmetry
3. They have ability to synthesize nucleic acids and proteins
4. Antibiotics have no effect on them

Pigment-containing membranous extensions in some cyanobacteria are :
1. Basal bodies
2. Pneumatophores
3. Chromatophores
4. Heterocysts

Besides paddy fields, cyanobacteria are also found inside vegetative part of :
1. Cycas
2. Equisetum
3. Psilotum
4. Pinus

Archaebacteria differ from eubacteria in:
1. Cell membrane structure
2. Mode of nutrition
3. Cell shape
4. Mode of reproduction

Five kingdom system of classification suggested by R.H. Whittaker is not based on:
1. Presence or absence of a well defined nucleus
2. Mode of reproduction
3. Mode of nutrition
4. Complexity of body organisation

The motile bacteria are able to move by:
1. fimbriae
2. flagella
3. cilia
4. pili

Which of the following shows coiled RNA strand and capsomeres?
1. Polio virus
2. Tobacco mosaic virus
3. Measles virus
4. Retro virus

Viruses have :
1. DNA enclosed in a protein coat
2. Prokaryotic nucleus
3. Single Chromosome
4. Both DNA and RNA

Which one of the following matches is correct?

True nucleus is absent in :
1. Mucor
2. Vaucheria
3. Volvox
4. Anabaena