156: Amoebiasis, malaria and typhoid are diseases due to amoeba, malarial parasites and typhoid bacillus which are collectively called:
(a) Anthropods
(b) Protozoa
(c) Mollusca
(d) Pisces
157: Consider the following statements:
1. Non-function of lachrymal gland is an important symptom of deficiency of Vitamin A.
2. Deficiency of Vitamin B1 can lead to indigestion and heart enlargement.
3. Vitamin C deficiency can lead to pain in the muscles.
4. Deficiency of Vitamin D causes increased loss of Ca++ in urine.
Which of the statements given above are correct?
(a) 1 and 2
(b) 2, 3 and 4
(c) 1, 3 and 4
(d) 1, 2, 3 and 4
Explanation:
Night blindness, non functioning of lacrymal glands, dryness, keratinisation of conjuctive and cornea of the eyes are vitamin A deficiency symptoms.
Vitamin B1 also called thiamine or anti beri-beri or antineuritic factor causes muscular dystrophy, heart enlargement, indigestion, nervous disorder and polyneuritis on deficiency. indigestion, nervous disorder and polyneuritis on deficiency. The deficiency of vitamin C or Ascorbic acid or Antiscorbiutic acid causes bleeding gums, loosening of teeth, pain in the muscles, fatigue, loss of weight and poor wound healing. Deficiency of Vitamin D causes increased loss of Ca++ in urine, therefore no Ca++ gets deposited in the bone. This causes rickets in children and osteomalacia in adults.
158: Hypochondria is a:
(a) Disease of eyes
(b) Disease of sexual organs
(c) Disease of low blood pressure
(d) State of morbid anxiety about one's own health, with complaint of imaginary disorders
159: Mon 863 is a variety of maize. It was in the news for the following reason
(a) It is a genetically modified variety which is pest resistant
(b) It is a genetically modified dwarf variety which is resistant to drought
(c) It is a genetically modified variety with ten times higher protein content than regular maize crop
(d) It is a genetically modified variety used exclusively for bio-fuel production
Explanation:
Mon 836 is a gentically engineered (GE) insect resistant maize (corn) that expresses a Bt-toxin (Cry38b1). This toxin, which stems from a micro-grganism (Bacillus thuringiensis), is meant to protect the maize against the corn rootworm pest. This GE maize is different from those Bt-plants (Mon 810, Bt11, Bt 176) already placed on the market, as they produce another toxin (Cry1Ab), which is toxic to the European corn borer. Further, the GE maize contains an antibiotic resistance marker gene (ntpII conferring resistance to kanamycin).
160: The hormone insulin is a:
(a) Glycolipid
(b) Fatty acid
(c) Peptide
(d) Sterol
Explanation:
Insulin is a poplypeptide of 76 aminoacids hence called protein hormone. It is secreted by pancreas which helps in maintaining blood glucose levels by converting excess of glucose into glycogen (Glycogenesis). Lack of Insulin results in excess glucose in the blood (heperglycemia) and the disease is called 'Diabetes mellitus'.