Which one of the following living organisms completely lacks a cell wall?
1. Cyanobacteria
2. Sea- fan (Gorgonia)
3. Saccharomyces
4. Green algae

Organisms which obtain energy by oxidation of reduced inorganic compounds are

A fungal disease that spreads by seeds and flowers is
1. Loose smut of Wheat
2. Corn smut
3. Covered smut of Barley
4. Soft rot of Potato

Toxin is secreted during storage condition by
1. Fusarium
2. Colletotrichum
3. Penicillium
4. Aspergillus

In lichens, fungus has
1. Symbiotic relationship with alga
2. Epiphytic relationship with alga
3. Saprophytic relationship with alga
4. Parasitic relationship with alga

Azolla has a symbiotic relationship with
1. Chlorella
2. Anabaena
3. Nostoc
4. Tolypothrix

Which of the following statements about viruses is correct ?
1. Viruses contain either DNA or RNA
2. Viruses possess their own metabolic system
3. Viruses are facultative parasites
4. Viruses are readily killed by antibiotics

Bacterial flagella are formed of
1. Amines
2. Proteins
3. Lipids
4. Carbohydrates

Barophilic prokaryotes
1. Occur in water containing high concentration of barium hydroxide
2. Grow slowly in alkaline frozen lakes at high altitude
3. Grow and multiply in very deep marine sediments
4. Readily grow and divide in sea water enriched with soluble salt of barium

Crown gall disease of plants is caused by
1. Ti-plasmid
2. Pi-plasmid
3. Virus
4. Protozoan