Option “1” is correct Pasteurization is the heat-treatment process that destroys pathogenic microorganisms in certain foods and beverages. It is named after the French scientist Louis Pasteur. It is used to stabilize and remove disease from milk.
826. The longest bone in the human body is –
1. Ulna
2. Humerus
3. Femur
4. Tibia
Option “3” is correct The longest bone in the human body is femur.
827. Which of the digestive organs contains gastric acid?
1. Stomach
2. Small intestine
3. Appendix
4. Colon
Option “1” is correct The stomach, an important organ for digestion, produces gastric juice which is comprised of hydrochloric acid, water and enzymes. Hydrochloric acid works with the main gastric enzyme called pepsin to aid the digestion of protein.
828. Biofertilizers convert nitrogen to _________ .
Option “2” is correct A Bio fertilizer is a substance which contains living microorganisms which, when applied to seeds, plant surfaces, or soil, colonize the rhizosphere or the interior of the plant and promotes growth by increasing the supply or availability of primary nutrients to the host plant. They convert nitrogen to ammonia.
829. Polio is caused by –
1. Bacteria
2. Virus
3. Fungus
4. Protozoa
Option “2” is correct Poliomyelitis, often called polio or infantile paralysis, is an infectious disease caused by the polio virus.
830. In bio fortification technique plant breeders use breeding to overcome –
1. Loss due to insect pests
2. Decrease in food production
3. Deficiencies of micronutrients and vitamins
4. Loss due to plant diseases
Option “3” is correct In bio fortification technique plant breeders use breeding to overcome deficiencies of micronutrients and vitamins.
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