261: The offending substance in the liquor tragedies leading to blindness, etc. is
(a) ethyl alcohol
(b) amyl alcohol
(c) benzyl alcohol
(d) methyl alcohol
262: Influence of genes in controlling the activity of living organisms is through:
(a) Photosynthesis
(b) Protein synthesis
(c) Vitamins
(d) Hormones
263: Which one of the following elements is alloyed with iron to produce steel which can resist high temperatures and also have high hardness and abrasion resistance ?
(a) Aluminium
(b) Chromium
(c) Nickel
(d) Tungsten
Explanation:
'The hardness of steel directly proportional to the percentage of chromium. Chromium is alloyed with Iron to produce steel which can resist high temperatures and also have high hardness and abrasion resistance ?
264: 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
265: "3D printing" has applications in which of the following?
1. Preparation of confectionery items
2. Manufacture of bionic ears
3. Automotive industry
4. Reconstructive surgeries
5. Data processing technologies
Select the correct answer using the code given below :
(a) 1, 3 and 4 only
(b) 2, 3 and 5 only
(c) 1 and 4 only
(d) 1, 2, 3, 4 and 5