Biology MCQs

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Adult human stem cells, unlike embryonic stem cells, are found in adult tissues. Among the major sources, bone marrow is often used to procure these cells. They have the property to self-renew and differentiate into numerous types of specialized cells. Stem cells obtained from the bone marrow can form different cells including blood cells and cells that contribute to the immune system.

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B vitamins are a class of water-soluble vitamins that play important roles in cell metabolism. This is the correct statement as most of the B Vitamins are water-soluble. They are not primarily organic acids nor are they mostly synthesized in the body. They’re found in highest abundance in meat, and dietary supplements containing all eight are referred to as a vitamin B complex, which indicates that they’re more often ingested rather than synthesized.

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Protein in the pulses (or more correctly legume) is found in Albumin form. Pulses are a low fat source of protein and on average, pulses contain about twice the amount of protein found in whole grains like wheat, oats, barley or rice.

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This process requires that a high pressure be exerted on the high concentration side of the membrane.

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A pleura is a serous membrane which folds back onto itself to form a two-layered membranous pleural sac. It surrounds each lung and attach to the internal surface of the thoracic cavity.

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Smallpox was an infectious disease caused by one of two virus variants, Variola major and Variola minor. the World Health Organization (WHO) certified the global eradication of the disease in 1980.

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Hydrogen in the human body / organ makes the main basis of working of the MRI (Magnetic resonance imaging). It is a medical imaging technique which is used in radiology to form pictures of the anatomy and the physiological processes of the body.

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Thymine is the nitrogenous base that is present in DNA but not in RNA. Thymine is a pyrimidine base that pairs with adenine through hydrogen bonding in DNA. In RNA, thymine is replaced with uracil, which pairs with adenine.
The four nitrogenous bases in DNA are adenine, guanine, cytosine, and thymine. The four nitrogenous bases in RNA are adenine, cytosine, guanine, and uracil.

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Seismonastic Movement is caused by the mechanical stimuli like shock, touch, fast moving wind, etc. Mimosa pudica is a perennial herb which is also known as the touch me not plant or the sensitive plant, is well-known for closing its leaves (or folding its leaves inwards) when touched.

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A hen that is committed to hatching chicks is known as a broody. The state of being broody is controlled by instinct, hormones and lighting conditions. Chicken come out of the eggs within the 21 days after being hatched by the hen. Some breeds take a little less and some a little longer. If the egg has not hatched after 25 days, it should be removed from the broody hen or incubator. Eggs need constant heat during the full incubation period for the embryo to develop into a chick.