31. The elements known as primary nutrients for plants are ____:
[A] Nitrogen, Phosphorus and Potassium
[B] Potassium, Boron and Nitrogen
[C] Nitrogen, Oxygen and Silicon
[D] Nitrogen, Phosphorus and Iron
Show Answer
Correct Answer: A [Nitrogen, Phosphorus and Potassium]
Notes:
Nitrogen (N), Phosphorus (P) and Potassium (K) are considered as the three essential or primary nutrients for plants. Together they make up the trio known as ‘NPK’. Other important nutrients are Calcium, Magnesium and Sulphur.
32. The total number of living organisms, both plants and animals, in a given area is called ____:
[A] Buffers
[B] Biomass
[C] Batholith
[D] Barrage
Show Answer
Correct Answer: B [Biomass]
Notes:
A biomass is total quantity of weight of the planet that can be classified according to the plants and animals that live in it. Temperature, soil, and the amount of light and water help determine what life exists in a biome.
33. With which one of the following Jacobsons organ is related to?
[A] Vision
[B] Chewing
[C] Hearing
[D] Smelling
Show Answer
Correct Answer: D [Smelling]
Notes:
Jacobson’s organ, also called vomero-nasal organ, is a patch of sensory cells within the main nasal chamber that detects heavy moisture-borne odour particles. It is a “sense of smell” receptor that is actually not receptive to ordinary odours.
34. Cinnamon is obtained from which part of the plant?
[A] Bark
[B] Stem
[C] Fruits
[D] Roots
Show Answer
Correct Answer: A [Bark]
Notes:
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. The aroma and flavor of cinnamon derive from its essential oil and principal component, cinnamaldehyde, as well as numerous other constituents, including eugenol.
35. Bark of which tree is used as a condiment?
[A] Palm
[B] Neem
[C] Cinnamon
[D] Clove
Show Answer
Correct Answer: C [Cinnamon]
Notes:
Cinnamon is a spice obtained from the inner bark of several trees from the genus Cinnamomum that is used in both sweet and savoury foods. The bark must be processed immediately after harvesting while still wet. Once processed, the bark will dry completely in four to six hours, provided that it is in a well-ventilated and relatively warm environment.
36. Which of the following vitamins contain nitrogen?
[A] Vitamin A
[B] Vitamin B
[C] Vitamin C
[D] Vitamin D
Show Answer
Correct Answer: B [Vitamin B]
Notes:
Vitamin B contains nitrogen atoms that allow them to participate in regulating metabolism. For example, Vitamin B3 is a water soluble vitamin containing compound Niacin or Niacinamide, a nitrogen containing vitamin.
37. The blood clot formed is due to presence of which of the following?
[A] Platelets
[B] Red Blood Cells
[C] Haemoglobin
[D] White Blood Cells
Show Answer
Correct Answer: A [Platelets]
Notes:
The components of blood include plasma, red blood cells and white blood cells, and cell fragments called platelets. The primary function of platelets is to aid in the blood clotting process. When activated, these cells adhere to one another to block the flow of blood from damaged blood vessels.
38. The specific role of Vitamin K is in the synthesis of _____:
[A] Albumin
[B] Globulin
[C] Antibodies
[D] Prothrombin
Show Answer
Correct Answer: D [Prothrombin]
Notes:
Vitamin K is a necessary participant in synthesis of several proteins that mediate both coagulation and anticoagulation. It is noteworthy for the synthesis of Prothrombin (coagulation factor II) that forms thrombin in the clotting process. Vitamin K is integrally involved in the clotting mechanism of blood.
39. The edible part of Cabbage is ____:
[A] Fruit
[B] Vegetative bud
[C] Condensed flower
[D] Inflorescence
Show Answer
Correct Answer: B [Vegetative bud]
Notes:
In cabbage, the edible part is vegetative bud. Vegetative buds are buds from which vegetative parts like leaves and stems arise, rather than flowers. Enlarged buds or parts of buds form the edible portion of some horticultural crops. Cabbage and head lettuce are examples of unusually large terminal buds.
40. What is the name of structural protein present in rhinoceros horn and human hair?
[A] Amino acid
[B] Keratin
[C] Melanin
[D] Glycolytic
Show Answer
Correct Answer: B [Keratin]
Notes:
Keratin is one of a family of fibrous structural proteins that is the key structural material making up hair, nails, horns, claws, hooves, and the outer layer of human skin. Keratin is also the protein that protects epithelial cells from damage or stress.
