Diatomaceous earth is used as a heat insulator in boilers and steam pipes because the cell wall of diatom is
1. Composed of iron
2. Composed of silicon dioxide
3. a good conductor of heat
4. a bad conductor of electricity
Enzymes are not found in:
1. Fungi
2. Algae
3. Virus
4. Cyanobacteria
Virus are living, because:
1. They multiply in host cells
2. Carry anaerobic respiration
3. Carry metabolic activity
4. Cause infection
Which disease of man is similar to cattle's, bovine spongiform encephalopathy:
1. | Encephalitis | 2. | Jacob-Creutzfeldt disease |
3. | Spongiocitis of cerebrum | 4. | Spondylitis |
Organisms that obtain energy by the oxidation of reduced inorganic compounds are called:
1. Photo autotrophs
2. Chemo autotrophs
3. Saprozoic
4. Coproheterotrophs
In five kingdom system, the main basis of classification:
1. Structure of the nucleus
2. Nutrition
3. Structure of cell wall
4. Asexual reproduction
In protozoa like Amoeba and Paramecium, an organ is found for osmoregulation which is:
1. Contractile vacuole
2. Mitochondria
3. Nucleus
4. Food vacuole
In which of the animal dimorphic nucleus is found:
1. Amoeba proteus
2. Trypanosoma gambiens
3. Plasmodium vivax
4. Paramecium caudatum
Black rust of wheat is caused by:
1. Puccinia
2. Ustilago
3. Albugo
4. Phytophthora
Stored food in fungi:
1. Starch
2. Proteins
3. Glycogen
4. Chitin