Biology MCQs

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Red blood cells are erythrocytes. RBCs are hermaphrodite cells and in humans without a nucleus. RBCs contain an iron-rich protein called haemoglobin.

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Blood clotting, Production of blood proteins, and Elimination of water, drugs, and toxins from the body are results in severe, acute, or incurable liver disease.

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If your adrenal glands are not working properly resulting in low blood pressure, low blood sugar levels, and high levels of potassium in the blood.

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Cholera disease is an acute diarrheal illness caused by Vibrio cholerae bacteria.

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Dirofilariasis is a disease caused by Dirofilaria worm infection. Dirofilaria immitis are also known as heartworm or dog heartworm.

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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 trait produced by the effect of a gene or an allele is called a Monogenic trait.

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A cross between a homozygous plant with recessive traits and a heterozygous plant is known as a test cross. A test cross is a valuable tool in predicting the genotype of the organism in question. In its simplest form, a test cross is an experimental cross of an individual organism of dominant phenotype but unknown genotype and an organism with a homozygous recessive genotype (and phenotype). Test cross is done to determine the genotype of an F2 generation plant, showing dominant characteristics. In the test cross, an F2 plant that shows the dominant trait is crossed with the homozygous recessive.

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Plant wilting occurs after excessive loss of water by transpiration and lesser absorption. i.e. rate of transpiration exceeds rate of water absorption. On a hot day, plants transpire heavily and cannot absorb water speedily to keep pace with transpiration loss, even when there is enough water.

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Cotton is the most popular of the BT crops. In BT cotton, BT gene was isolated and transferred from a bacterium Bacillus thurigiensis to American cotton. The American cotton was subsequently crossed with Indian cotton to introduce the gene into native varieties. The BT cotton variety contains a foreign gene obtained from Bacillus thuringiensis. This bacterial gene, introduced genetically into the cotton seeds, protects the plants from bollworm (A. lepidoptora), a major pest of cotton.