Biology MCQs

31. How are Infectious Diseases transmitted?
[A] Droplet Infection
[B] They are inherited
[C] By seeing patients
[D] Eating an unhealthy diet

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32. What is an autonomously repeating circular extra-chromosomal DNA?
[A] Bacteria
[B] Nitrogenous base
[C] RNA
[D] Plasmid

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33. The first transgenic crop was __
[A] Potato
[B] Brinjal
[C] Cotton
[D] Tobacco

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34. Heart attack occurs due to
____:
[A] Impairment of hearts working due to unknown reasons
[B] Bacterial attack on the heart
[C] Lack of supply of blood to the heart itself
[D] Stopping of heart beat

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35. Which one of the following is commonly known as Pond Silk?
[A] Yeast
[B] Rhizopus
[C] Ulothrix
[D] Spirogyra

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36. What is commonly known as white plague?

[A] Typhoid
[B] Malaria
[C] Tuberculosis
[D] Plague

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37. Which of the following processes are associated with plants during dark period?
[A] Respiration and transpiration
[B] Transpiration and conduction
[C] Photosynthesis and respiration
[D] Conduction and respiration

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38. If a healthy freshwater fish is placed in salt water, what will be the expected consequence?

[A] The fish becomes dehydrated and dies
[B] The fish becomes bloated and dies
[C] The fish suffers from fungal or bacterial disease and dies
[D] There is no observable effect on the fish provided there is sufficient food

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39. Which muscles in the skin contract to make the hairs on our skin stand up straight (goose bumps) when we are cold or frightened?

[A] Epidermis
[B] Collagen
[C] Elastin
[D] Arrector pili

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40. Which one of the following animals belongs to mollusca?
[A] Haliotis
[B] Hare
[C] Hydra
[D] Hyla

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