241: Consider the following statements regarding bones in the human body :
1. They consist of 80% solid matter and 20% water.
2. Solid matter in the bones is made mainly of cartilage.
3. Impregnation of salts including carbonates and phosphates of lime imparts hardness to the bones.
4. In old age, the proportion of lime decreases and bones become brittle and break easily.
Of these statements :
(a) 1, 2 and 3 are correct
(b) 2 and 4 are correct
(c) 2 and 3 are correct
(d) 1, 2, 3 and 4 are correct
242: The structural changes in exports means:
(a) Change in the commodities of export
(b) Increasing exports along with the imports
(c) Increasing imports
(d) Change in the commodities of imports
243: 'The Arctic Home of the Vedas' was written by:
(a) Minoo Masani
(b) Acharya Vinoba Bhave
(c) S. Radhakrishnan
(d) Bal Gangadhar Tilak
244: Match List I (Physiological processes) with List II (Cell organelles) and select the correct answer by using the codes given below the lists :
List I : List II
I. Photosynthesis : (A) Plasma membrane
II. Mineral uptake : (B) Chloroplast
III. Respiration : (C) Mitochondria
IV. Protein Synthesis : (D) Ribosomes
Codes:
(a) I - A, II - B, III - C, IV - D
(b) I - A, II - B, III - D, IV - C
(c) I - B, II - A, III - C, IV - D
(d) I - B, II - A, III - D, IV - C
245: Consider the following statements regarding blood pressure :
1. It is the pressure exerted by the blood on the walls of any vessel
2. It decreases in the arteries as the distance from the heart increases
3. It is lower in the capillaries than in the arteries
4. It is usually lower in women than in men.
Of these statements
(a) 1 and 4 are correct
(b) 2, 3 and 4 are correct
(c) 1, 2 and 3 are correct
(d) 1, 2, 3 and 4 are correct