Biology MCQs

31. Heart disease and High blood pressure are examples of which genetic disorder?
[A] Chromosomal Disorder
[B] Mitochondrial Inheritance
[C] Multifactorial Genetic Inheritance
[D] None of these

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32. Bacteria protect themselves from viruses by fragmenting viral DNA?
[A] Ligase
[B] Endonuclease
[C] Exonuclease
[D] Gyrase

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33. Which two ideas are included in the definition of biotechnology?
[A] Medical biotechnology and Agricultural biotechnology
[B] Traditional biotechnology and Modern molecular biotechnology
[C] Blue biotechnology and Red biotechnology
[D] Green biotechnology and Animal biotechnology

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34. Which of the following statement is incorrect?
[A] Budding is not possible in hydra
[B] Hydra have only a sexual reproduction
[C] Most frogs are an oviparous animals
[D] Internal fertilisation takes place in hens

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35. Why do the plant closes stomata when it does NOT need carbon dioxide for photosynthesis?
[A] To store carbon dioxide
[B] To prevent water loss
[C] To release stored oxygen
[D] None of the above

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36. The hydrophilic nature of DNA is due to the presence of ____:
[A] A number of hydrogen bonds
[B] Phosphate group
[C] Thymine base
[D] Deoxyribose sugar

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37. The bark of willow tree is a source of which medicine?
[A] Paracetamol
[B] Aspirin
[C] Antiseptic
[D] Antacid

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

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39. Alveoli are balloon like structures within the ____:
[A] Heart
[B] Lungs
[C] Liver
[D] Kidney

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40. Which of the following microorganisms is used in milk curdling?
[A] Bacillus
[B] Lactobacillus
[C] Leuconostoc
[D] Acetobacter

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