UPSC 1997 Prelims Questions with Answers

Explanation

The 1996 WTO Ministerial Conference in Singapore marked a significant milestone in Commerce in Information Technology with the adoption of the Information Technology Agreement (ITA). This agreement, signed by multiple WTO members, aimed to eliminate tariffs on IT products like computers, semiconductors, and telecom equipment, fostering global trade. By reducing trade barriers, the ITA became a key achievement for the WTO, enhancing the technology sector’s integration into the global economy.

Explanation

In 1996, Himachal Pradesh became the first state in India to pass a legislation making the maintenance of one’s parents mandatory. The Himachal Pradesh Maintenance of Parents and Senior Citizens Act, 1996 was enacted to ensure that children provide financial and physical support to their elderly parents, particularly those who are unable to support themselves.

Explanation

Indian Standard Time (IST) is UTC +5:30 hours, based on the longitude 82°30’ E. The International Date Line (IDL) is at approximately 180° longitude. The difference in longitude between the IDL (180°) and the IST meridian (82°30’ E) is 97°30’ (180° - 82°30’). Time difference calculation: 15° of longitude corresponds to 1 hour of time difference. 97°30’ corresponds to 6 hours and 30 minutes (97.5° × 15° = 6.5 hours). Normal Earth Rotation (West to East):

When it is 12:00 noon at the IDL, it would be 05:30 AM (IST) (because IST is ahead of IDL by 6 hours 30 minutes). Reversed Rotation (East to West):

If the Earth rotates in the opposite direction, the time difference reverses. Instead of being ahead, IST will lag behind the IDL by 6 hours and 30 minutes. When it is 12:00 noon at the IDL, it will be 6:30 PM (18:30 IST).

Explanation

Option (d) is correct: The description refers to an extensive archipelago stretching from Aceh, a province on the northern tip of Sumatra Island in Indonesia, to the Torres Strait, which lies between Australia and Papua, near eastern Indonesia. The distance of about 5,000 miles and the mention of 14,000 islands align with Indonesia, the world’s largest archipe-lagic state, comprising over 17,000 islands. Major islands in this vast archipelago include Sumatra, Java, Borneo (Kalimantan), Su-lawesi, and New Guinea, which is shared with Papua New Guinea. Options (a), (b) and (c) are incorrect:

West Indies: The West Indies, an archipelago in the Caribbean Sea, consists of many islands, cays, and reefs. However, it is much smaller than Indonesia, with fewer islands and shorter distances from north to south. The islands also vary in size but are not as large as Indonesia’s biggest islands. Therefore, the West Indies do not match the description’s focus on vast distances and large island sizes. Japan: Japan, an East Asian archipelago, has a smaller land area and fewer islands than Indonesia. Its north-to-south span is much shorter than 5,000 miles, and its islands, though varied in size, do not include some of the world’s largest. Hence, Japan does not match the description as accurately as Indonesia. Philippines: The Philippines, an archipelago in Southeast Asia, has thousands of islands. However, it is smaller than Indonesia, with shorter distances between its northernmost and southernmost islands. While the Philippines have many islands, they lack the vast size and variety described, especially islands comparable to the world’s largest. Therefore, the Philippines do not match the description as closely as Indonesia.

Explanation

The pituitary gland, often termed the "master gland,” regulates various endocrine glands through its tropic hormones. The parathyroid gland regulates calcium and phosphate balance in the body via parathyroid hormone (PTH) and its activity is independent of pituitary gland control. It is self-regulating, depending directly on calcium levels in the blood. Options (a), (b), and (c) are incorrect: The thyroid, gonads, and adrenal glands are regulated by pituitary tropic hormones such as TSH (thyroid-stimulating hormone), LH/FSH (for gonads), and ACTH (adrenocorticotropic hormone) for the adrenal glands. These glands depend on the pituitary to regulate the production of key hormones that control metabolism, growth, and stress responses.

Explanation

Oxygen transportation in the human body is essential for cellular respiration, which generates energy in the form of ATPs. This process ensures oxygen is delivered to tissues and carbon dioxide is removed efficiently. Oxygen enters the body through the lungs (2), binds to hemoglobin in the blood (1), and is transported to the tissues (3) where it is utilized for energy production. This sequence reflects the physiological process of oxygen transport.

Explanation

Option (b) is correct: The corpus luteum is a temporary endocrine structure found in the ovary formed after ovulation. It produces progesterone, which is critical for maintaining the uterine lining and supporting pregnancy in the early stages. Options (a), (c), and (d) are incorrect: The corpus luteum is specific to the ovary and is unrelated to the brain, pancreas, or spleen.

Explanation

Alpha-keratin is a fibrous structural protein that forms the primary component of the skin, hair, nails, horns, and hooves in mammals. It belongs to the keratin family of proteins and is rich in disulfide bonds, which provide strength, durability, and elasticity to epithelial cells. In the skin, alpha-keratin creates a protective barrier against physical damage, dehydration, and pathogens. In hair and nails, it contributes to their hardness and resistance to wear. Options (a), (c), and (d) are incorrect: Alpha-keratin is not found in blood, lymph, or eggs. These tissues have other proteins like hemoglobin (in blood) or albumin (in eggs).

Explanation

Option (a) is correct: The average fat content of buffalo milk is approximately 7.2%, significantly higher than that of cow>s milk. Buffalo milk is richer in fat compared to cow>s milk, which typically contains around 3-4% fat. The higher fat content in buffalo milk contributes to its creamy texture and makes it ideal for producing dairy products like butter, ghee, and cheese. Options (b), (c), and (d) are incorrect: 4.5% is typical of cow’s milk, while 9.0% and 10.0% are not average values for buffalo milk.

Explanation

Option (d) is correct: Fructose is the major component of honey making up about 38-40% of its composition. It is a monosaccharide and is sweeter than glucose. The high fructose content is responsible for honey>s sweetness and its resistance to crystallization compared to glucose. Options (a), (b), and (c) are incorrect:

Glucose is one of the primary sugars found in honey, but it is not the major component. Honey typically contains about 30-35% glucose. Glucose is a monosaccharide and contributes to the sweetness and crystallization of honey. Sucrose is a disaccharide composed of glucose and fructose. While it is present in honey, it is found in very small amounts (usually less than 5%). Most of the sucrose in nectar is broken down into glucose and fructose by enzymes during the honey-making process. Maltose is not a significant sugar in honey. It is also known as maltobiose or malt sugar which is a disaccharide formed from two units of glucose joined with an -bond between the glucose units.