1. Select the total number of macronutrients from the following:
C, H, O, N, P, S, Cu, Zn, B, Cl, Mn, Ni, K, Ca, Mg, Mo
a) 8
b) 9
c) 10
d) 11
Explanation: 9
2. C, H, O is mainly obtained from
a) Soil and \[H_{2}O\]
b) Soil only
c) \[H_{2}O\] and \[CO_{2}\]
d) \[CO_{2}\] only
Explanation: C, H, O is mainly obtained from \[H_{2}O\] and \[CO_{2}\]
3. What is the number of the absolutely essential elements for growth and metabolism of all
plants?
a) 14
b) 17
c) 21
d) 23
Explanation: 17
4. Some beneficial elements required by higher plants are
a) Na, Si, Co, Se
b) Na, Si, Os, I
c) Na, Co, Ir, At
d) Na, Si, W, Ag
Explanation: Na, Si, Co, Se
5. The structural elements of cell are
a) C, H, O, N
b) N, P, K, Ca
c) Ca, Mg, K
d) Ca, Mg, Fe, O
Explanation: The structural elements of cell are C, H, O, N
6. Select the correct match:
Column I Column II
A. \[Mg^{2+}\] – 1. Chlorophyll
B. P – 2. ATP
C. Zn – 3. Alcohol dehydrogenase
D. Mo – 4. Nitrogenase
a) A–2, B–1, C–3, D–4
b) A–1, B–2, C–3, D–4
c) A–4, B–1, C–2, D–3
d) A–4, B–3, C–2, D–1
Explanation: A–1, B–2, C–3, D–4
7. Which element plays an important role in opening and closing of stomata?
a) P
b) N
c) K
d) Ca
Explanation: K
8. In how many broad categories can the essential elements be grouped on the basis of their
diverse function?
a) 1
b) 2
c) 3
d) 4
Explanation: 4 categories
9. Which essential nutrient in plant is required in greatest amount?
a) N
b) P
c) K
d) Ca
Explanation: N
10. Nitrogen is one of the major constituents of
a) Protein
b) Nucleic acid
c) Vitamins and hormones
d) All of these
Explanation: All of these