31. What is the phenomenon of light responsible for the functioning of the human eye?
[A] Reflection
[B] Refraction
[C] Power of accommodation
[D] Persistence of vision
Show Answer
Correct Answer: B [Refraction ]
Notes:
The phenomenon of light responsible for the functioning of the human eye is Refraction.
32. How many chambers are there in the human heart?
[A] Two
[B] Three
[C] Four
[D] None of these
Show Answer
Correct Answer: C [Four]
Notes:
The human heart is divided into four chambers: two upper chambers called atria, and two lower chambers called ventricles.
33. Renin is released from juxtaglomerular (JG) cells when?
[A] blood flow in the glomerulus increases
[B] blood flow in the glomerulus decreases
[C] blood flow in the glomerulus remains neutral
[D] None of these
Show Answer
Correct Answer: B [blood flow in the glomerulus decreases]
Notes:
Renin is released from juxtaglomerular (JG) cells when blood flow in the glomerulus decreases.
34. Which of the following disease is transmitted by animal bite and saliva?
[A] Rabies
[B] Tuberculosis
[C] Tetanus
[D] AIDS
Show Answer
Correct Answer: A [Rabies]
Notes:
Rabies disease is transmitted by animal bites and saliva.
35. Which of the following are the important applications of biofertilizers?
[A] Seedling root dip
[B] Soil Treatment
[C] Both 1 and 2
[D] Neither 1 nor 2
Show Answer
Correct Answer: C [Both 1 and 2]
Notes:
Seedling root dip, Seed, and Soil Treatment are the important applications of biofertilizers.
36. Which of the following is a free-living aerobic and non-photosynthetic nitrogen-fixing bacterium?
[A] Rhizobium
[B] Nostoc
[C] Azospirillum
[D] Azotobacter
Show Answer
Correct Answer: D [Azotobacter]
Notes:
Azotobacter is a free-living aerobic and non-photosynthetic nitrogen-fixing bacterium.
37. A renewable, biodegradable fuel that is manufactured from vegetable oils and animal fats are called __
[A] Bioethanol
[B] Biomethane
[C] Biodiesel
[D] None of these
Show Answer
Correct Answer: C [Biodiesel ]
Notes:
A renewable, biodegradable fuel that is manufactured from vegetable oils and animal fats are called Biodiesel
38. The technique of __ crosses the limits of conventional hybridization processes.
[A] immunology
[B] modern hybridization
[C] genetic engineering
[D] cell biology
Show Answer
Correct Answer: C [genetic engineering]
Notes:
The technique of genetic engineering crosses the limits of conventional hybridization processes.
39. How many approaches are there in order to clone the complete genome?
[A] 1
[B] 2
[C] 3
[D] 4
Show Answer
Correct Answer: B [2]
Notes:
There are basically two approaches to cloning the entire genome. In the first approach, systematic cloning is performed and the second approach is based on randomly cloning overlapping fragments.
40. The skin biting mosquito has legs as locomotory organ which are
____:
[A] One pair
[B] Two pairs
[C] Three pairs
[D] Four pairs
Show Answer
Correct Answer: C [Three pairs]
Notes:
Like all other insects, in a mosquito, the thorax is specialized for locomotion. Three pairs of jointed legs and a pair of wings are attached to the thorax. The insect wing is an outgrowth of the exoskeleton therefore analogous to winds of a birds.
