1. Select the incorrect match:
Element Absorbable form
a) Nitrogen – \[NO_3^-,NO_2^-,NH_4^+\]
b) Sulphur – \[S^{2-}\]
c) Iron – \[Fe^{3+}\]
d) Boron – \[BO_3^{3-},B_{4}O_7^{2-}\]
Explanation: Sulphur – \[S^{2-}\]
2. Which of the following is required for all phosphorylation reaction?
a) N
b) Ca
c) P
d) K
Explanation: P is required for all phosphorylation reaction
3. Which of the following is the function of potassium?
(1) Cation–anion balance in cell
(2) Involved in protein synthesis
(3) Activation of enzyme
(4) Opening and closing of stomata
(5) Maintenance of turgidity of cell
a) All except 1
b) All except 1 and 2
c) All except 3
d) All of these
Explanation: All of these
4. Which element is involved in the formation of mitotic spindle?
a) N
b) P
c) Ca
d) K
Explanation: Ca element is involved in the formation of mitotic spindle
5. The following functions are related to which element mainly?
(1) Activated enzyme of photosynthesis and respiration.
(2) Involved in synthesis of DNA and RNA.
(3) Helps to maintain the structure of ribosome.
a) Ca
b) Mg
c) S
d) Fe
Explanation: Mg
6. Which of the following group contains sulphur in all members?
a) Thiamine, ferredoxin, aspartic acid
b) Biotin, coenzyme A, methionine
c) Methionine, proline, leucine
d) DNA and RNA
Explanation: Biotin, coenzyme A, methionine
7. Which of the following is true about iron?
a) It is a constituent of ferredoxin and cytochrome.
b) It activates catalase enzyme.
c) It is essential for the formation of chlorophyll.
d) All the above
Explanation: All the above
8. Which element is related to the splitting of water in light reaction of photosynthesis?
a) Mn
b) Mo
c) Fe
d) B
Explanation: Mn element is related to the splitting of water in light reaction of photosynthesis
9. Match the column:
Column I Column II
A. Zinc – 1. Needed for the synthesis of Auxin
B. Copper – 2. Essential for water splitting reaction
C. Boron – 3. Pollen germination
D. Molybdenum – 4. Component of nitrate reductase
E. Chlorine – 5. Associated with enzyme involved in Redox reaction
a) A–2, b–3, c–1, d–5, e–4
b) a–1, b–2, c–3, d–4, E–5
c) a–1, b–5, c–3, d–4, e–2
d) a–5, b–4, C–3, d–2, e–1
Explanation: a–1, b–5, c–3, d–4, e–2
10. Which element generally activates the carboxylase enzyme?
a) Mo
b) Mn
c) Mg
d) Zn
Explanation: Zn element generally activates the carboxylase enzyme