Q1. The Vitamin responsible for anti-sterile activity is
(a) Vitamin A
(b) Vitamin B
(c) Vitamin C
(d) Vitamin D
(UPSC Prelims 1979)
Answer: (c) Vitamin C
Explanation:
Vitamin C plays a key role in cellular health, tissue repair, and immune function. Its antioxidant properties help prevent sterility-related conditions by maintaining reproductive tissue integrity and supporting hormonal balance.
Q2. Which of the following is a balanced fertiliser for plants?
(a) Urea
(b) Ammonia sulphate
(c) Nitrates
(d) Compost
(UPSC Prelims 1979)
Answer: (d) Compost
Explanation: Compost is an organic fertiliser that contains a balanced mix of nutrients, containing nitrogen, phosphorus, and potassium, along with micronutrients. It improves soil structure, enhances microbial activity, and supports sustainable plant growth.
Q3. Milk fever in cows occurs due to the lack of
(a) Phosphates
(b) Calcium
(c) Iron
(d) Iodine
(UPSC Prelims 1979)
Answer: (b) Calcium
Explanation:
Milk fever is a metabolic disorder seen in dairy cows shortly after calving, caused by a sudden drop in blood calcium levels due to high calcium demand for milk production. This leads to muscle weakness, tremors, and in severe cases, coma or death if untreated.
Q4. Carbohydrates, proteins and vitamins which are responsible for energy, growth and vitality are obtained respectively from
(a) Cereals, milk and vegetables
(b) Milk, pulses and cereals
(c) Milk, pulses and vegetables
(d) Pulses, vegetables and cereals
Answer: (a) Cereals, milk and vegetables
Explanation: Cereals are rich in carbohydrates, providing energy. Milk is a good source of proteins, essential for growth and tissue repair. Vegetables supply vitamins, which support vital functions and immunity.