Free Biotechnology MCQs with Answers

• A. Somatic hybridisation
• B. Biofortification
• C. Biomagnification
• D. Micropropagation.

Explanation: Breeding of crops with higher levels of vitamins and minerals or higher protein and healthier fats is called biofortification.

• A. Biodiesel production
• B. Seedless fruit production
• C. Energy production from sewage
• D. Gene transfer without a vector.

Explanation: Direct gene transfer is the transfer of naked DNA into plant cells, but the presence of a rigid plant cell wall acts as a barrier to…

• A. Plant breeding
• B. Irradiation
• C. genetic Engineering
• D. Tissue culture.

Explanation: Genetic variation present among plant cells during tissue culture is called somaclonal variation.

• A. Haploids are more abundant in nature than diploids
• B. All mutations, whether dominant or recessive are expressed in haploids
• C. Haploids are reproductively more stable than diploids
• D. Mutagens penetrate in haploids more effectively than in diploids.

Explanation: Haploid plants, are always pure because they possess only one set of chromosomes.

• A. Loose smut of wheat
• B. Black rust of wheat
• C. Bacterial leaf blight of rice
• D. Downy mildew of grapes

Explanation: The first inorganic fungicide was developed by R.M.A. Millardet (1882) against downy mildew (Plasmopara viticola) of grape­-vine at the…

• A. 3 and 4
• B. 1 and 4
• C. 2 and 3
• D. 1 and 2

Explanation: Bacterial blight of chickpea is caused by bacterium Xanthomonas campestris.

• A. Higher levels of cortisone
• B. Lower levels of blood testosterone
• C. Lower levels of adrenaline/noradrenaline in its blood
• D. Higher levels of thyroxine.

Explanation: A bullock is a castrated bull. Bulls are castrated to make them more meek and docile.

• A. Coryza
• B. Newcastle disease
• C. Pasteurellosis
• D. Salmonellosis

Explanation: New castle disease is a highly contagious zoonoic bird disease affecting many domestic and wild avian species.The causal agent, New castle…

• A. Crossing of two inbred parental lines
• B. Harvesting seeds from the most productive plants
• C. Inducing mutations
• D. Bombarding the seeds with DNA.

Explanation: Hybridisation or heterosis or hybrid vigour is defined as the superiority of hybrid over parents.

• A. Highly prone to pests
• B. Low in yield
• C. Free from intraspecific competition
• D. Characterized by a poor root system.

Explanation: Monoculture describes systems that have very low diversity. Monoculture is the destruction of a diverse ecosystem and replacement with a…

• A. Barley
• B. Rye
• C. Pearl millet
• D. Sugarcane.

Explanation: Triticaleis, the first man-made cereal or crop, has been produced by intergeneric hybridization between common wheat (Triticum aestivum)…

• A. Wheat, rice and maize
• B. Wheat, rice and barley
• C. wheat, maize and sorghum
• D. Rice, maize and sorghum.

Explanation: Most important source of food in the world are cereals. They are a rich source of carbohydrates, present in endosperms which is the edible…

• A. X­-rays
• B. UV (260 nm)
• C. Gamma rays (from cobalt­-60)
• D. Alpha particles

Explanation: Gamma rays are produced when an unstable atomic nucleus like cobalt­-60 releases energy to gain stability.

• A. Goat
• B. Sheep
• C. Goat­-sheep cross
• D. Kashmir sheep­-Afghan sheep cross

Explanation: Pashmina refers to a type of cashmere wool and textiles made from it. This wool comes from a special breed of goat indigenous to high…

• A. Plantlet culture
• B. Organ culture
• C. Micropropagation
• D. Macropropagation.

Explanation: Micropropagation is the latest method of obtaining a large number of plantlets from plant tissue culture.

• A. Triploid
• B. Tetraploid
• C. Diploid
• D. Monoploid.

Explanation: Colchicine is an alkaloid extracted from the seed and corm of Colchicum autumnale.

• A. Cellular totipotency
• B. organogenesis
• C. Double fertilization
• D. Test tube culture.

Explanation: Totipotency refers to the capacity of each living cell of a multicellular organism being capable of independent development when provided…

• A. Oat
• B. Barley
• C. Maize
• D. Rye.

Explanation: Triticale is the first man made cereal or crop, which has been produced by intergeneric hybridization between common wheat (Triticum…

• A. Gambusia
• B. Rohu
• C. Clarias
• D. Exocoetus

Explanation: Gambusia affinis is regarded as a larvicidal fish as it selectively feeds on mosquito larvae.

• A. A. indica is largest wild honey bee.
• B. Wax is waste material of honey bee.
• C. Workers are the smallest of the three castes.
• D. The drone of the honey bee is diploid.

Explanation: A highly organised division of labour is found in the colony of honey bees.