Biology MCQs

1. Diabetes insipidus (DI) caused by a deficiency of arginine vasopressin (AVP), also known as antidiuretic hormone (ADH). This hormone is secreted by which endocrine gland?
[A] Thyroid Gland
[B] Pituitary Gland (Hypophysis)
[C] Pancreas
[D] Liver

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2. The pitcher plant is characterized by which of the following plants ?
[A] Autotrophes
[B] Insectivorous
[C] Allergen
[D] None of the above

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3. Which among the following conditions will give birth to Fraternal Twins?
[A] a single egg is fertilized to form one zygote which then divides into two separate embryos
[B] sperm cells fertilize both the ovum and the second polar body
[C] two eggs are independently fertilized by two different sperm cells
[D] none of the above

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4. Who among the following is called father of Modern Genetics ?
[A] William Bateson
[B] Robert Hooke
[C] E J Butler
[D] F O Bower

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5. What name has been given to the fear of crossing roads?
[A] Arthrophobia
[B] Atychiphobia
[C] Aichmophobia
[D] Agyrophobia

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6. With reference to classification of the flora and fauna, the meaning of term “Taxon” is __?
[A] A group of same species
[B] A group of organisms with same chromosome number
[C] A group of category of organisms
[D] A group of same genera

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7. Which movements of “Touch me not plant” lead to closing of its leaves when touched?
[A] Nyctinastic movements
[B] Seismonastic movements
[C] Chemonastric movements
[D] Photonastic movements

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8. Which of following is the primary photosynthetic pigment?
[A] Chlorophyll-b
[B] Carotenoid
[C] Chlorophyll-a
[D] Anthocyanin

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9. Which of the following gave green colour to plants?
[A] Chlorophyll
[B] Sugar
[C] Mitochondria
[D] Xylem

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10. Retina in the eyes acts as which of the following parts of the camera? (UPSC Prelims 1982)
[A] Lens of the camera
[B] Shutter of the camera
[C] Film of the camera
[D] None of these

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