Vaccines prepared by genetic engineering are safe to man because they are

• least active form of virus

• active form of virus

• coat protein formed as antibody

• All of the above

The growth of pollen tube towards embryo sac is

• geotropism

• chemotaxis

• thigmotaxis

• phototaxis

Late blight of potato is caused by

• Cystopus

• Phytophthora

• Alternaria

• Ustilago

Wildlife is destroyed most when

• there is lack of proper care

• mass scale hunting for foreign trade

• its natural habitat is destroyed

• natural calamity

A hyaline bisexual and self-fertilized flower that does not open at all is

• chasmogamaus

• apogamous

• cleistogamous

• polygamous

Science of engineering and technology applied to life sciences is

• Biotechnology

• Genetic engineering

• Pathology

• Biological science

Ribosomal RNA (rRNA) is synthesized in

• nucleolus

• nucleosome

• cytoplasm

• ribosome

Which of the following. is generally used in chronic diarrhoea, dysentery, bleeding, piles, leucorrhoea etc?

• Quinine

• Ephidrine

• Chir

• Catha

Triticum vulgare has been found to be presently evolved as

• diploid

• tetraploid

• pentaploid

• hexaploid

The number of RNA molecules in 60S sub- particles of 80S ribosomes are

• five 

• four

• three

• two