1. Protein is not found in (c) Rice. Rice is primarily a carbohydrate-rich staple food, with relatively low protein content compared to animal products like meat and milk or plant-based protein sources like pulses and legumes. While rice does contain small amounts of protein, it is not considered a sigRead more

    Protein is not found in (c) Rice. Rice is primarily a carbohydrate-rich staple food, with relatively low protein content compared to animal products like meat and milk or plant-based protein sources like pulses and legumes.
    While rice does contain small amounts of protein, it is not considered a significant source compared to other food groups. However, when consumed alongside complementary protein sources such as pulses or legumes, rice can contribute to meeting protein requirements as part of a balanced diet.
    In contrast, meat (a), milk (b), and pulses (d) are notable sources of protein. Meat provides high-quality animal protein, milk contains whey and casein proteins, and pulses offer plant-based proteins such as lentils, beans, and chickpeas, making them essential components of protein-rich diets for many people worldwide.

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  2. The percentage of protein in soybean is (a) 42%. Soybeans are considered one of the richest plant sources of protein, containing approximately 36-56% protein by weight. The protein content of soybeans makes them a staple ingredient in various vegetarian and vegan diets, as well as in animal feed andRead more

    The percentage of protein in soybean is (a) 42%. Soybeans are considered one of the richest plant sources of protein, containing approximately 36-56% protein by weight. The protein content of soybeans makes them a staple ingredient in various vegetarian and vegan diets, as well as in animal feed and food processing.

    Soy protein is considered a high-quality protein due to its balanced amino acid profile and bioavailability. It provides all essential amino acids required by the human body, making it comparable to animal protein sources in terms of nutritional quality.

    The versatility of soybeans extends beyond their protein content; they also contain essential fatty acids, fiber, vitamins, and minerals, contributing to their overall nutritional value. As a result, soybeans and soy-based products are widely utilized in global cuisines and food industries to meet dietary protein needs and promote health and sustainability.

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  3. Alpha keratin is a protein (c) Present in wool. It is a fibrous structural protein found in the epidermis of skin, hair, wool, nails, feathers, and horns of vertebrates. Alpha keratin forms the structural framework of these materials, providing strength, resilience, and flexibility. In wool, alpha kRead more

    Alpha keratin is a protein (c) Present in wool. It is a fibrous structural protein found in the epidermis of skin, hair, wool, nails, feathers, and horns of vertebrates. Alpha keratin forms the structural framework of these materials, providing strength, resilience, and flexibility.

    In wool, alpha keratin molecules arrange themselves into complex structures, such as intermediate filaments and helical coils, creating a durable and elastic fiber. This unique structure allows wool fibers to bend and stretch without breaking, making wool a valuable natural material for textiles and fabrics.

    Due to its structural properties, alpha keratin also plays essential roles in protecting and insulating the body, facilitating sensory perception, and enabling locomotion in animals. It is a versatile protein found throughout the animal kingdom, contributing to various biological structures and functions.

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  4. The substance responsible for accelerating chemical reactions in biological systems is (c) Enzymes. Enzymes are specialized proteins that function as biological catalysts, enhancing the rate of biochemical reactions without being consumed in the process. Enzymes achieve this by lowering the activatiRead more

    The substance responsible for accelerating chemical reactions in biological systems is (c) Enzymes. Enzymes are specialized proteins that function as biological catalysts, enhancing the rate of biochemical reactions without being consumed in the process.

    Enzymes achieve this by lowering the activation energy required for a reaction to occur, thereby facilitating the formation of the transition state and speeding up the reaction. This acceleration is crucial for maintaining the multitude of biochemical processes necessary for life, including metabolism, digestion, cellular respiration, and DNA replication.

    Unlike chemical catalysts, which are often specific to a particular reaction, enzymes exhibit high specificity for their substrates, the molecules upon which they act. This specificity is due to the unique three-dimensional structure of enzymes, which includes an active site where the substrate binds and undergoes catalysis.

    Overall, enzymes play essential roles in maintaining cellular function and homeostasis, enabling organisms to carry out vital biochemical processes efficiently.

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  5. The substance responsible for accelerating chemical reactions in biological systems is (c) Enzymes. Enzymes are specialized proteins that function as biological catalysts, enhancing the rate of biochemical reactions without being consumed in the process. Enzymes achieve this by lowering the activatiRead more

    The substance responsible for accelerating chemical reactions in biological systems is (c) Enzymes. Enzymes are specialized proteins that function as biological catalysts, enhancing the rate of biochemical reactions without being consumed in the process.

    Enzymes achieve this by lowering the activation energy required for a reaction to occur, thereby facilitating the formation of the transition state and speeding up the reaction. This acceleration is crucial for maintaining the multitude of biochemical processes necessary for life, including metabolism, digestion, cellular respiration, and DNA replication.

    Unlike chemical catalysts, which are often specific to a particular reaction, enzymes exhibit high specificity for their substrates, the molecules upon which they act. This specificity is due to the unique three-dimensional structure of enzymes, which includes an active site where the substrate binds and undergoes catalysis.

    Overall, enzymes play essential roles in maintaining cellular function and homeostasis, enabling organisms to carry out vital biochemical processes efficiently.

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