Biology MCQs

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Bacterium contain no membrane bound nucleus and rarely contain membrane bound organelles. Simply, most don’t have any large organelles with their own membranes; this means no nucleus, no mitochondria and no chloroplast. Even if a bacteria wanted to have mitochondria , it is couldn’t.

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The five kingdom classification was proposed by R.H. Whittaker in 1969. The five kingdoms were formed on the basis of characteristics. It includes Kingdom Monera, Kingdom Protista, Kingdom Fungi, Kingdom Plantae, and Kingdom Animalia.

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A noncommunicable disease (NCD) is a medical condition or disease that is by definition non-infectious and non-transmissible among people. Eg. Cancer which is also called malignancy, is an abnormal growth of cells.

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• Invasion by the malaria parasite, Plasmodium falciparum, brings about extensive changes in the host red cells. Numerous proteins secreted by the internalized parasite and interacting with red cell membrane proteins are responsible for the changes occurring to the host cell.
• Lymphatic filariasis is caused by the worms Wuchereria bancrofti, Brugia malayi, and Brugia timori. These worms occupy the lymphatic system, including the lymph nodes; in chronic cases these worms lead to the syndrome of elephantiasis. These worms occupy the subcutaneous layer of the skin, in the fat layer.
• Encephalitis is an acute inflammation of the brain usually resulting from either a viral infection or due to the body’s own immune system mistakenly attacking brain tissue.
• Leukaemia is a cancer that starts in blood-forming tissue, usually the bone marrow. It leads to the over-production of abnormal white blood cells, the part of the immune system which defends the body against infection.

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Pituitary gland is called as the master gland because pituitary controls many other endocrine glands such as thyroid, ovaries, testicles etc.

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DNA replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules.

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Pertussis is a respiratory disease commonly known as whooping cough. It is a very contagious disease caused by a type of bacteria called Bordetella pertussis.

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Club Moss is related to Pteridophyta. Club moss is also known as ground pine. It belongs to the Lycopodiaceae family, which includes several species of seedless vascular plants.

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Photosynthesis is a process that is performed by green plants to make their food. In this process, the leaves of the green plant absorb CO2 from the atmosphere and make food in the presence of sunlight and water.

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The common Indian bullfrog is Rana tigrina. Species of the Indian bullfrog inhabit the wetlands of South and Southeast Asia, living in holes and thickets close to permanent water.