Biology MCQs

31. Which of the following is called Mendel’s first law of inheritance?
[A] Law of Dominance
[B] Law of Segregation
[C] Law of Independent Assortment
[D] All of the above

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32. What is the nitrogen-fixing symbiotic organism present in Azolla?
[A] nostoke
[B] anabaena
[C] aulosira
[D] azospirillum

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33. Which protein helps in DNA winding?
[A] Helicase
[B] Histone
[C] Lipase
[D] Cellulase

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34. 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

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35. In a poultry unit, the factor most influencing the cost is the cost of
____:
[A] Feed
[B] Chicks
[C] Transportation
[D] Medicines

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36. Match correctly the Nutrient defficiency given in List-I with the diseases caused by the deficiency given in List-II:

(a) Iodine
(b) Iron
(c) Niacin
(d) Vitamin Bl2

(i) Microcytic anaemia
(ii) Pernicious anaemia
(iii) Goitre
(iv) Pellagia Codes

[A] (iv), (ii), (i), (iii)
[B] (i), (iii), (ii), (iv)
[C] (ii), (iv), (iii), (i)
[D] (iii), (i), (iv), (ii)

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37. Which of the following is a vestigial organ in human body?
[A] Spleen
[B] Tailbone
[C] Thyroid
[D] Gall bladder

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38. The sugar present in DNA is ____:
[A] Pentose
[B] Xylulose
[C] Hexose
[D] Heptulose

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39. The tusk of elephant is an enormously enlarged ____:
[A] Upper incisor
[B] Upper canine
[C] Lower canine
[D] Lower incisor

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40. Which of the following is a good source of Vitamin E?
[A] Meat
[B] Ghee
[C] Yellow Yolk
[D] Fresh Vegetables

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