Biology MCQs

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Amoebic dysentery diseases are caused by the protozoan parasite Entamoeba histolytica.

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Yellow fever, Mumps, and German measles are caused by the RNA virus. Whereas Smallpox is caused by the DNA virus.

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The ringworm of Beard is also called Tinea barbae. This is a superficial fungal infection of the skin, hair, and hair follicles caused by dermatophytes.

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Bacteria protect themselves from viruses by fragmenting viral DNA with Exonuclease. Enzymes that work by cleaving one nucleotide at a time from the end (Exo) of the polynucleotide chain are called exonucleases.

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Restriction enzymes, also known as restriction endonucleases, are proteins that act like molecular scissors, capable of cutting DNA molecules at specific locations. They are used for generating fragmentation patterns of DNA and creating recombinant DNA. However, the actual synthesis of new DNA strands is not a function of restriction enzymes, but is performed by enzymes called polymerases.

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Green Revolution related to Agriculture. It took place between 1950-1960 and focused mainly on increasing agricultural production and started in Mexico.

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Leptospirosis is a bacterial disease caused by corkscrew-shaped bacteria called Leptospira. Signs and symptoms can range from none to mild such as headaches, muscle pains, and fevers; to severe with bleeding from the lungs or meningitis. If the infection causes the person to turn yellow, have kidney failure and bleeding, it is then known as Weil’s disease.

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Pituitary gland, called Master Gland, is the smallest endocrine gland. It controls the general growth of the body coordinating the functioning of other endo crime glands and stimulates the primary sex hormones, i.e. ovaries and testes.

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While fertilization is necessary for organisms that reproduce sexually, individuals that reproduce asexually?do so without the need for fertilization. These organisms produce genetically identical copies of themselves through?binary fission, budding, fragmentation, parthenogenesis, or other forms of asexual reproduction.

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The literal meaning of ‘sanguinivorous’ is someone subsisting on a diet of blood, or blood-sucking bats and animals. Mosquitoes belong to this category. Leech, female mosquitoes, vampire bats are other examples of Sanguivores.