Biology MCQs

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Hemoglobin in humans has a very high affinity for carbon monoxide, forming carboxyhemoglobin which is a very bright red in color. Carbon monoxide is thus problematic for humans because it has affinity higher than that of oxygen.

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Wheat germ oil is extracted from the germ of the wheat kernel, which makes up only 2.5% by weight of the kernel. It has the highest content of Vitamin E.

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Skin works as a respiratory organ in frog. The frog has three respiratory surfaces on its body which it uses to exchange gas with its surroundings: the skin, in the lungs and on the lining of the mouth.

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Polycythaemia is a disease related to Red Blood Cells. It refers to an increase in the number of red blood cells in the body which cause the blood to be thicker, and this, in turn, increases the risk of other health issues, such as blood clots.

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Flowering in long day plants is related to Gibberlin. Long-day plants usually flower when the night length falls below their critical photoperiod. Many of our summer blooming flowers and garden vegetables are long day plants.

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A chloroplast without cell wall is protoplast. Chloroplasts are organelles that perform photosynthesis. The photosynthetic pigment chlorophyll captures the energy from sunlight, converts it, and stores it in the energy-storage molecules ATP and NADPH while freeing oxygen from water in plant and algal cells.

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Alveoli are tiny sacs in our lungs. The main function of the alveoli is the exchange of carbon dioxide for oxygen in the lungs.

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Tissue culture is the growth of tissues or cells in an artificial medium separate from the organism. It refers to the culture of animal cells and tissues, with the more specific term plant tissue culture being used for plants. The term “tissue culture” was coined by American pathologist Montrose Thomas Burrows.

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Vitamin B3 protects us from Pellagra disease. Vitamin B-3 is important for a healthy body and may help to slow the progression of heart disease, diabetes, etc. It aids your metabolism and nervous system.

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Xylem is a type of tissue in vascular plants that transports water and some nutrients from the roots to the leaves. Water is passively transported into the roots and then into the xylem. The forces of cohesion and adhesion cause the water molecules to form a column in the xylem.