Classification of Essential Elements

Q. Which among the following is a vitamin?

1. Ferredoxin
2. Cytochrome
3. Thiamine
4. Catalase

Q. Cysteine and methionine are

1. sulphur containing proteins
2. sulphur containing amino acids
3. enzymes
4. disaccharides

Q.

Identify the improper pair from the given options.

1. Ionic balance in plants - Na

2. Cell wall component - B

3. Activation of Nitrogenase - Cu

4. Required for iron absorption - Ni

Q.

'Little leaf' is caused due to the deficiency of

1. Boron

2. Copper

3. Zinc

4. Phosphorus

Q.

Assertion (A): Higher plants can not utilize nitrogen that is present in the form of $N_2$ in air.

Reason (R): In higher plants, the nitrogenase enzyme is absent.

1. Both A & R are true and R explains A

2. Both A & R are true and R does not explain A

3. A is true and R is False

4. Both A & R false

Q. Select the correct option:
i. Some essential elements can activate or inhibit enzymes.
ii. Some essential elements can change osmotic potential of a cell.
iii. All essential elements are components of energy related compounds.

1. Only ii is incorrect
2. Both i & iii are correct
3. Only iii is incorrect
4. All statements are correct

Q. The deficiency of an element causes multiple symptoms in plants. However, the same symptoms may be caused by a deficiency of different elements.

1. True
2. False

Q. Which among the following is not a main component of the biomacromolecules?

1. Carbon
2. Hydrogen
3. Nitrogen
4. Magnesium