31. Which of the following organ is involved in the purification of Inhaled Air?
[A] Cartilage
[B] Hair or cilia
[C] Mucus Membrane
[D] Septum
Show Answer
Correct Answer: B [Hair or cilia]
Notes:
Hair or cilia is the organ of the nose that is involved in the purification of Inhaled Air.
32. Name the muscle which works opposite to each other?
[A] Cardiac Muscles
[B] Skeletal Muscle
[C] Antagonists’s muscle
[D] Stapedius muscle
Show Answer
Correct Answer: C [Antagonists’s muscle]
Notes:
A muscle that contracts is called an agonist whereas a muscle that relaxes or lengthens is called an antagonist.
33. A membrane, or sac, that surrounds your heart is called a __.
[A] pericardium
[B] capillaries
[C] vessels
[D] None of these
Show Answer
Correct Answer: A [pericardium]
Notes:
A membrane, or sac, that surrounds your heart is called the pericardium. It holds the heart in place and helps it to function properly.
34. Which of the following is a function of the heart?
[A] makes blood cells
[B] to pump blood throughout the body
[C] Both 1 and 2
[D] Neither 1 nor 2
Show Answer
Correct Answer: B [to pump blood throughout the body]
Notes:
The primary function of the human heart is to pump blood throughout the body.
35. Whose function is it to carry deoxygenated blood away from the heart to the lungs and then return the deoxygenated blood back to the heart?
[A] Coronary circulation
[B] Systemic circulation
[C] Pulmonary circulation
[D] None of these
Show Answer
Correct Answer: C [Pulmonary circulation]
Notes:
Pulmonary circulation is a part of the circulation that is responsible for carrying deoxygenated blood from the heart to the lungs and then returning the deoxygenated blood back to the heart.
36. Colour blindness is an __ linked recessive trait.
[A] Z chromosome
[B] Y chromosome
[C] X chromosome
[D] None of these
Show Answer
Correct Answer: C [X chromosome]
Notes:
Usually, color blindness is inherited as a recessive trait on the X chromosome. This is known in genetics as X-linked recessive inheritance.
37. In most species, mitochondrial DNA is passed down from which of the following?
[A] DNA
[B] Mother and Father
[C] Father
[D] Mother
Show Answer
Correct Answer: D [Mother]
Notes:
In most of the species, mitochondrial DNA is passed down from Mother.
38. The molecule which dissolves in water is called __
[A] hydrophilic molecule
[B] hydrophobic molecule
[C] soluble molecule
[D] insoluble molecule
Show Answer
Correct Answer: A [hydrophilic molecule]
Notes:
A molecule whose interaction with water and other polar substances is more thermodynamically favorable than their interaction with oil or other hydrophobic solvents is called a hydrophilic molecule.
39. The development of a fruit without fertilization is called ____:
[A] Apomixis
[B] Parthenocarpy
[C] Hybridogenesis
[D] Gametogamy
Show Answer
Correct Answer: B [Parthenocarpy]
Notes:
Parthenocarpy is the development of fruit without fertilization of seeds. In nature, parthenocarpy occurs as a mutation. Another biological mechanism stenospermacarpy also produces seedless fruits, but here the seeds are aborted while they are still small. In nature, parthenocarpy occurs as a mutation. Some plants require pollination or stimulation for parthenocarpy. This is known as stimulative parthenocarpy.
40. Fat present below the skin surface in our body acts as a barrier against ____:
[A] Loss of heat from the body
[B] Loss of salt from the body
[C] Loss of essential body fluids
[D] Entry of harmful micro-organisms from the environment
Show Answer
Correct Answer: A [Loss of heat from the body]
Notes:
A layer of body fat acts as an insulator and traps heat. The subcutis is the deepest layer of skin. The subcutis, consisting of a network of collagen and fat cells, helps conserve the body’s heat and protects the body from injury by acting as a “shock absorber.
