Biology MCQs

1. Which of the following bacteria forms an endosymbiotic nitrogen fixing association with roots of legumes that helps in Nitrogen Fixation?
[A] Clostridium
[B] Rhizobium
[C] Salmonella
[D] Staphylococcus

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2. In which of the following diseases , nerve cells are affected?
[A] Tetanus
[B] Polio
[C] Whooping Cough
[D] Diphtheria

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3. In which of the following conditions a person is born with both ovarian and testicular tissues i.e. both female & male organs?
[A] Swyer syndrome
[B] Penile agenesis
[C] Polyorchidism
[D] Hermaphroditism

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4. Gargling with a solution of table salt is known to provide relief for a sore throat because ____ ?
[A] It kills bacteria
[B] It works as analgesic
[C] It dehydrates water from inflammatory tissues by Osmosis
[D] Placebo effect

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5. Which among the following usually regulates breathing in Humans?
[A] The number of red blood cells
[B] The amount of haemoglobin in the blood
[C] Inherent genetic control
[D] CO2 levels and pH sensors

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6. Urea is one of the major constituents of Urine in our body. In which among the following organs, Urea is formed?
[A] Kidneys
[B] Urinary Bladder
[C] Urethra
[D] Liver

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7. Identify the organelle with the help of given information:

  1. It is a double membrane organelle.
  2. It is found only in eukaryotic cells.
  3. It is responsible for ATP production.

Select the correct option from codes given below:

[A] Centriole
[B] Lysosome
[C] Endoplasmic Reticulum
[D] Mitochondria

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8. Which of the following branches of Biology is not associated with snakes ?
[A] Herpetology
[B] Ophiology
[C] Serpentology
[D] Saurology

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9. Which of the following taxonomic level is same for man, monkey and tiger?
[A] Genus
[B] Family
[C] Order
[D] Class

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10. Which organs have different basic structures, yet present a similarity in appearance and perform analogous functions?
[A] Kidney and liver
[B] Heart and lungs
[C] Wings of a bat and a bird
[D] Brain and spinal cord

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