MCQ’S ON MACRONUTRIENTS
1. The possible supplies of nitrogen and phosphorous ions in the soil is exhausted as they are found as
(a) particles having no charge
(b) ions that are negatively charged
(c) ions that are positively charged
(d) a disproportionate mixture of negatively charged ions
Answer: (b)
2. Plant of cabbage consumes phosphorous from
(a) phosphate rocks
(b) water irrigated soil
(c) dry soil
(d) none of the above
Answer: (b)
3. This is not absorbed through soil
(a) Potassium
(b) Nitrogen
(c) Carbon
(d) All of these
Answer: (c)
4. This is a major macronutrient, component of vitamins and enzymes
(a) sea salt
(b) sulphur
(c) carbon dioxide
(d) calcium phosphate
Answer: (b)
5. This macronutrients is a structural component of a cell wall activating the enzymes
(a) nitrogen dioxide
(b) boron dioxide
(c) carbon monoxide
(d) calcium
Answer: (d)
6. This macronutrient checks the opening and closing of the stomata and decreases the water loss from leaves
(a) nitrogen
(b) methane
(c) urea
(d) potassium
Answer: (d)
7. Deficiency of this causes the death of root tips and stem
(a) carbon
(b) calcium
(c) nitrogen
(d) phosphorous
Answer: (b)
8. Mustard’s sinigrin pungent principle can be attributed to
(a) tannins containing nitrogen
(b) glycoside containing amino group
(c) glycoside containing sulphur
(d) alkyloids containing cyanide radicle
Answer: (c)
9. This essential element is not a constituent of any enzyme however triggers the activity of many enzymes
(a) K
(b) Mn
(c) Mg
(d) Zn
Answer: (a)
10. Carbon is made available to crop plants in this form
(a) element carbon
(b) carbonates
(c) amino acids
(d) carbon dioxide
Answer: (d)
