31. Chloroquine is given to treat which of the following disease?
[A] Malaria
[B] Tuberculosis
[C] Tetanus
[D] AIDS
Show Answer
Correct Answer: A [Malaria]
Notes:
Chloroquine is given to treat Malaria disease. Quinine (from the bark of Cinchona), camaquine, primaquine, and daraprim are also given to treat Malaria.
32. A trait produced by the effect of a gene or an allele is called__
[A] Oncogenic Trait
[B] Monogenic trait
[C] Polygenic trait
[D] None of these
Show Answer
Correct Answer: B [Monogenic trait]
Notes:
A trait produced by the effect of a gene or an allele is called a Monogenic trait.
33. What is required for nitrogen fixation by Rhizobium?
[A] Potassium
[B] Phosphorus
[C] Nitrate
[D] Sodium
Show Answer
Correct Answer: B [Phosphorus]
Notes:
Phosphorus is required for nitrogen fixation by Rhizobium. This is a genus of Gram-negative soil bacteria.
34. Which of the following forestry materials can be used as biomass?
[A] Logging residues
[B] Tallow
[C] Fish oil
[D] Manure
Show Answer
Correct Answer: A [Logging residues]
Notes:
The forestry material used as biomass is accumulating residues. Tallow, fish oil, and manure belong to animal products used as biomass.
35. What is another important research area of biotechnology offers?
[A] optimum conditions for the catalyst
[B] pure form of catalyst
[C] an impure form of the catalyst
[D] purification of products
Show Answer
Correct Answer: A [optimum conditions for the catalyst]
Notes:
Optimum conditions for the catalyst is another important research area of biotechnology offers.
36. Biofortification is a ____:
[A] Method of plant breeding for disease resistance
[B] Method of developing resistance to insect pests
[C] Method of breeding crops to increase their nutritional value
[D] Strategy to combat unwanted nutrients in plants
Show Answer
Correct Answer: C [Method of breeding crops to increase their nutritional value]
Notes:
Biofortification is the breeding crops to increase their nutritional value. This can be done either through conventional selective breeding or genetic engineering. Biofortification differs from ordinary fortification because it focuses on making plant foods more nutritious as the plants are growing, rather than having nutrients added to the foods when they are being processed.
37. Azolla increases soil fertility for ____:
[A] Wheat cultivation
[B] Rice cultivation
[C] Maize cultivation
[D] Barley cultivation
Show Answer
Correct Answer: B [Rice cultivation]
Notes:
The nitrogen-fixing capability of Azolla an aquatic pteridophyte has led to it being widely used as a biofertiliser for increasing the productivity of rice fields. When rice paddies are flooded in the spring, they can be inoculated with Azolla, which then quickly multiplies to cover the water, suppressing weeds. The rotting plant material releases nitrogen to the rice plants, increasing the rice yield equivalent to that produced by 30-60 kg N/ha.
38. Commonest mammal is ____:
[A] Elephant
[B] Lion
[C] Human
[D] Panther
Show Answer
Correct Answer: C [Human]
Notes:
Humans are likely the most numerous species of mammal on Earth at the moment.
39. In which form is glucose stored in our body?
[A] Insulin
[B] Glucose
[C] Glycogen
[D] Fat
Show Answer
Correct Answer: C [Glycogen]
Notes:
Glucose is stored in the body as glycogen. The liver stores glucose in the form of glycogen which is released when it is needed. Also, fat can be converted into glucose when needed. Only the glycogen stored in the liver can be made accessible to other organs.
40. Glucose is a type of ____:
[A] Hexose sugar
[B] Pentose sugar
[C] Tetrose sugar
[D] Diose sugar
Show Answer
Correct Answer: A [Hexose sugar]
Notes:
Three common sugars (glucose, galactose and fructose) share the same molecular formula: C6H12O6. Because of their six carbon atoms, each is a hexose. They are “single” sugars or monosaccharides.
