Which one of the following essential micronutrients are associated with urease enzyme found in higher plants?

• Nickel

• Molybdenum

• Zinc

• Copper

62.

Plants are able to perceive light through various photoreceptors and downstream genes. Which of the following genes is NOT involved in light perception?

• PIF3

• NPR1

• PHY E

• CRY3

Free-living nitrogen fixers can survive in different ecological niches. Identify the incorrect combination from the following list:

• Azotobacter - acidic soil

• Deraxia - alkaline soil

• Beijernckia - acid soil

• Frankia - neutral soil

The oxidative pentose phosphate pathway provides the reducing equivalents for nitrite reduction in plastics (leucoplasts) of non-green plants. Which one of the following statements would be correct for the above mentioned pathway?

• Glutamate synthesized from NH${}_4^{+}$ is translocated from the cytosol to the leucoplast.

• α-ketoglutarate is translocated from cytosol to leucoplast.

• Glucose-6-phosphate is translocated and moves from leucoplast to cytosol.

• Triose phosphate is translocated from cytosol to leucoplast.

Perception of blue light n plants causes

• inhibition of cell elongation and stimulation of stomatal opening

• stimulation of cell elongation and inhibition of stomatal opening

• inhibition of stomatal opening

• inhibition of cell elongation

The following are few statements regarding the water potential of soil.

(A) The osmotic potential (ψ_s) of soil water is generally negligible, except in saline soils.

(B) The osmotic potential (ψ_s) of saline soil is always more than zero.

(C) In dry soils the hydrostatic pressure (ψ_p) of soil water potential is always positive.

(D) Gravitatinal potential (ψ_g) of soil water is always proportional to height of the tree.

Which one of the following combinations of above statements is true?

• (A) and (C)

• (B) and (D)

• (C) and (B)

• (D) and (A)

Following are few statements for regenration of plants from explants/ tissues

(A) Cytokinin is required for shoot development.

(B) Auxin is required for shoot development.

(C) Auxin to cytokinin ratio is very important.

(D) Jasmonic acid is required for both root and shoot development.

Which of the following combinations of above statements is true?

• (A) and (C)

• (B) and (D)

• (A) and (D)

• (B) and (C)

Which of the following mechanisms id NOT involved in providing photoprotection to plants?

• Degradation of D1 protein

• Zeaxanthin formation

• Photolysis of water

• Thermal dissipation

Which of the following plant hormones can mimic the det1 mutation, causing de-etiolation and chloroplast development in dark?

• Cytokinin

• Gibberellin

• Auxin

• Ethylene

Under which conditions do members of the family Gramineae synthesize and release phytosiderophores?

• Iron deficiency

• Phosphorus deficiency.

• Availability of iron complexes in rhizosphere

• Availability of phosphorus complexes in rhizosphere.