Biology MCQs

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4 tall plants and 1 medium height plant is totally impossible outcome of Mendel’s Experiment. Gregor Mendel discovered the fundamental laws of inheritance through his work on pea plants. They concluded that genes come in pairs and are inherited as separate units, one from each parent.

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A dominant Trait is a trait that “overpowers” and hides another trait.

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Bioethanol is denatured alcohol that is also called Methylated spirit. It is a liquid made from alcohol and other chemicals.

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The petiole is the stalk-like structure which connects the leaf blade to the stem. The petiole has tiny tubes, that connect the veins on the leaf blade to the stem. Few of these enable water transport to the leaf while the other carry food away from the leaf to other parts of the plant.

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Greek philosopher Aristotle is regarded as the Father of Biology. According to him, grouping of organisms had to be done on the basis of a number of characteristics and not just one. He is considered to be the first person to come up with a classification that still stands. His text ‘History of Animals’ is a landmark in the history of biology.

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Sclerenchyma cells are usually dead cells that have heavily thickened secondary walls containing lignin. The cells are rigid and non-stretchable and are usually found in non-growing regions of plant bodies, such as the bark or mature stems. Sclerenchyma is one of the three types of fundamental, tissue in plants; the other two types being Parenchyma and Collenchyma.

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Zika virus (ZIKV) is a member of the virus family Flaviviridae. It is spread by daytime-active Aedes mosquitoes, such as A. aegypti and A. albopictus. Its name comes from the Zika Forest of Uganda, where the virus was first isolated in 1947. Zika virus is related to the dengue, yellow fever, Japanese encephalitis, and West Nile viruses.

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A chromosome is an organized structure of DNA and protein found in cells. It is a single piece of coiled DNA containing many genes, regulatory elements and other nucleotide sequences. Chromosomes also contain DNA-bound proteins, which serve to package the DNA and control its functions.

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Infectious diseases are caused by pathogenic microorganisms, such as bacteria, viruses, parasites or fungi; the diseases can be spread, directly or indirectly, from one person to another. Tuberculosis (TB), infectious disease that is caused by the Tubercle bacillus, Mycobacterium tuberculosis. Chickenpox, also known as varicella, is a highly contagious disease caused by the initial infection with varicella zoster virus Cholera is an infectious disease that causes severe watery diarrhea, which can lead to dehydration and even death if untreated. Diabetes mellitus, commonly known as diabetes, is a metabolic disease that causes high blood sugar. The hormone insulin moves sugar from the blood into your cells to be stored or used for energy.

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Olfactory receptor, also called smell receptor, are present in the nose. It is a protein capable of binding odour molecules that plays a central role in the sense of smell (olfaction). It is responsible for the detection of odorants which give rise to the sense of smell. Activated olfactory receptors trigger nerve impulses which transmit information about odour to the brain.