Biology MCQs

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Sickle cell anemia is one of a group of hereditary disorders known as sickle cell diseases. It causes red blood cells to become misshapen and break down.

Notes:
The types of inheritance are as follows:
1. Complete dominance.
2. Incomplete dominance.
3. Co-dominance.
4. Sex-linked.

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Sesbania is green manure. Sesbania is a leguminous crop. It is commonly used as a green manure crop to add nitrogen and organic matter to the soil.

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Protease is an enzyme that cleaves proteins. These enzymes are made by animals, plants, fungi, and bacteria.

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The brain’s limbic system controls emotional expression through the hypothalamus, which has control over the body’s emotional responses systems. The hypothalamus is responsible for regulating hunger, thirst, response to pain, levels of pleasure, sexual satisfaction, anger and aggressive behavior, etc. It also regulates pulse, blood pressure, breathing, and arousal in response to emotional circumstances.

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The great saphenous vein, the major superficial vein of the medial leg and thigh, is the longest vein in the human body. It extends from the top of the foot to the upper thigh and groin, running along the length of the lower limb. It plays an important role in returning blood from the superficial tissues of the leg to the heart.

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Fermentation in food processing is the process of converting carbohydrates to alcohol or organic acids using microorganisms—yeasts or bacteria—under anaerobic conditions. It also occurs in oxygen-starved muscle cells, as in the case of lactic acid fermentation.

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Tortoises generally have lifespans comparable with those of human beings, and some individuals are known to have lived longer than 150 years. Because of this, they symbolize longevity in some cultures, such as China. The oldest tortoise ever recorded, and one of the oldest individual animals ever recorded, was Tui Malila. It was presented to the Tongan royal family by the British explorer Captain Cook shortly after its birth in 1777.

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The first observations of intracellular structures that probably represented mitochondria were published in the 1840s. Richard Altmann, in 1890, established them as cell organelles and called them “bioblasts”. The term “mitochondria” was coined by German microbiologist Carl Benda in 1898.

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All citrus fruits (orange, grapefruit, lime, and lemon) are excellent sources of vitamin C. Oranges contain the most vitamin C per gram. Lemons are regarded by most nutritionists as containing the second- highest amount of vitamin C per gram of fruit. Lemons contain about 40 milligrams of vitamin C per 100 grams of flesh.