Biology MCQs

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

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32. Name the muscle which works opposite to each other?
[A] Cardiac Muscles
[B] Skeletal Muscle
[C] Antagonists’s muscle
[D] Stapedius muscle

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33. A membrane, or sac, that surrounds your heart is called a __.
[A] pericardium
[B] capillaries
[C] vessels
[D] None of these

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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

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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

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36. Colour blindness is an __ linked recessive trait.
[A] Z chromosome
[B] Y chromosome
[C] X chromosome
[D] None of these

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37. In most species, mitochondrial DNA is passed down from which of the following?
[A] DNA
[B] Mother and Father
[C] Father
[D] Mother

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38. The molecule which dissolves in water is called __
[A] hydrophilic molecule
[B] hydrophobic molecule
[C] soluble molecule
[D] insoluble molecule

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39. The development of a fruit without fertilization is called ____:
[A] Apomixis
[B] Parthenocarpy
[C] Hybridogenesis
[D] Gametogamy

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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

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