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

Viruses are no more "alive" than isolated chromosomes because:

In which kingdom would you classify the archaea and nitrogen-fixing organism, if the five-kingdom system of classification is used?

Tobacco mosaic virus is a tubular filament of size:
1.  300 × 10 nm
2.  300 × 5 nm
3.  300 × 20 nm
4.  700 × 30 nm

Which one of the following statements about viruses is correct:
1. Viruses possess their own metabolic system
2. All viruses contain both RNA and DNA
3. Viruses are obligate parasites
4. Nucleic acid of viruses is known as capsid

Cauliflower mosaic virus contains:
1.  ss RNA
2.  ds RNA
3.  ds DNA
4.  ss DNA