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:

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