Biology MCQs

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Tocopherols are a class of organic chemical compounds, many of which have vitamin E activity. Deficiency of Tocopherol leads to sterility in males and females. Tocopherol exists in four different forms designated as α, β, δ, and γ.

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Butter is a type of dairy product that is made by churning cream or milk until the fat particles in the milk coalesce to form a solid mass. The resulting solid mass is known as butter and it is composed mostly of butterfat, which is a type of fat that is found in milk. To be more specific, butter is a fat that is dispersed in milk. This means that the butterfat is evenly distributed throughout the milk, giving it a smooth and creamy texture. While butter is most commonly made from cow’s milk, it can also be produced from the milk of other mammals, such as sheep, goats, buffalo, and yaks.

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Mumps is caused by Virus. Mumps is a viral infection that affects the salivary glands that’s easily preventable by a vaccine. Initial signs and symptoms include fever, muscle pain, headache, poor appetite, and feeling generally unwell.

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Helophyte are those plants which are typical of marshy or lake-edge environments, in which the perennating organ lies in soil or mud below the water level, but the aerial shoots protrude above the water for air.

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lysotrophic nutrition or Saprotrophic nutrition is a process of chemoheterotrophic extracellular digestion which is involved in the processing of decayed organic matter. It occurs in saprotrophs, and is most often associated with fungi and soil bacteria.

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The Red color of Red wine is mainly because of pigments such as anthocyanin. Anthocyanin is present in many fruits like plums, blueberries, and cherries.

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Urea is a nitrogenous waste that is produced in the liver; urine is produced in the kidney. We note here that Uric acid is excreted as a crystal to conserve water by many terrestrial animals. However, humans and earthworms release nitrogenous waste in the form of urea.

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Bones have blood vessels, but cartilage does not. Bones have a network of blood vessels that deliver oxygen and nutrients to the bone marrow. Cartilage is avascular, meaning it doesn’t have blood vessels. Instead, cartilage relies on diffusion to get nutrients from the surrounding environment. Because of this, cartilage heals more slowly than bone.
Cartilage is made up of chondrocyte cells that produce a matrix of collagen, proteoglycan, and elastin fibers. Cartilage is found in the joints, rib cage, ear, nose, throat, and between vertebral disks.

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In biology, tissue is a cellular organizational level between cells and a complete organ. Animal tissues are grouped into four basic types: connective, muscle, nervous, and epithelial.

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Pasteurization is the process of heating milk up and then quickly cooling it down to eliminate certain bacteria and all other microorganisms. More common is heating milk up to at least 161.6 degrees Fahrenheit for 15 seconds. There are following methods that are most commonly used:
• High Temperature, Short Time (HTST) method – This method requires that the milk be held at 161 degrees for 16 seconds.
• Ultra-Pasteurization (UP) – This is the type of pasteurization that you will most commonly see on cartons of milk, half-and-half and heavy cream.