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2381. The metal ion involved in stomatal regulation in plants is
A. Magnesium
B. Zinc
C. Potassium
D. Iron
Explanation:
2382. In which of the following cell organelles do photo and thermochemical reactions occur indifferent sites ?
A. Mitochondria
B. Chloroplasts
C. Ribosomes
D. Lysosomes
Explanation:
2383. The chemical (ethyl merceptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of
A. sulphur
B. fluorine
C. chlorine
D. bromine
Explanation:
2384. Stem cuttings are commonly used for regrowing
A. cotton
B. banana
C. mango
D. sugarcane
Explanation:
2385. Which of the following are involved in the making up of a DNA nucleotide ? 1. Phosphoric acid 2. Deoxyribose sugar 3. Nitrogenous base
A. 1 and 2
B. 2 and 3
C. 1 and 3
D. 1, 2 and 3
Explanation:
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