341. The primary function of RNA is –

1. Photosynthesis
2. Protein Synthesis
3. Replication
4. Translation

Option “2” is correct
The main function of RNA is to carry information of amino acid sequence from the genes to where proteins are assembled on ribosomes in the cytoplasm. This is done by messenger RNA (mRNA). In other words, primary function of RNA is protein synthesis.
342. Biofertilizers convert nitrogen to _________ .

1. Nitrates
2. Ammonia
3. Nitrogeneous
4. Amino acids

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.
343. 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.
344. 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.
345. Potato is a modiefied?

1. Root
2. Stem
3. Bud
4. Fruit

Option “2” is correct
Potato is a modified stem.
346. Which of the following is a Parthenocarpic fruit?

1. Banana
2. Apple
3. Mulberry
4. Strawberry

Option “1” is correct
Parthenocarpy is the natural or artificially induced production of fruit without fertilization of ovules, which makes the fruit seedless. Banana is a parthenocarpic fruit.
347. Which one of the following is NOT a function of kidney?

1. Regulation of blood pH
2. Removal of metabolic wastes from the body
3. Production of antibodies
4. Regulation of extracellular fluid volume

Option “3” is correct
Kidneys are essential in the urinary system and also serve homeostatic functions such as the regulation of electrolytes, maintenance of acid-base balance, and regulation of blood pressure (via maintaining salt and water balance). They serve the body as a natural filter of the blood, and remove wastes which are diverted to the urinary bladder whereas the antibodies are produced by antigens in the cell.
348. Cinnamon is obtained from which part of the plant?

1. Stem
2. Bark
3. Roots
4. Fruits

Option “2” is correct
Cinnamon is a spice obtained from the inner bark of several tree species from the genus Cinnamomum. Cinnamon is used mainly as an aromatic condiment and flavoring additive in a wide variety of cuisines, sweet and savoury dishes, breakfast cereals, snack foods, and traditional foods.
349. Insulin is a kind of _____

1. Hormone
2. Protein
3. Enzyme
4. Vitamin

Option “1” is correct
Insulin is a hormone made by the pancreas that allows body to use sugar (glucose) from carbohydrates in the food that we eat for energy or to store glucose for future use. Insulin helps keeps your blood sugar level from getting too high (hyperglycemia) or too low (hypoglycemia).
350. The right portion of human heart receives ______ blood.

1. Pure
2. Impure
3. Mixed
4. None of these

Option “2” is correct
The right side of the heart collects impure blood from the body and pumps it to the lungs. The left side of the heart collects pure blood from the lungs and pumps it to the body. The left and right sides of the heart are divided by walls called septums.
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