Mineral nutrition

Select the incorrect statement.

• Magnesium helps to maintain the ribosome structure

• Iron activates catalase enzyme and is involved in electron transport

• Boron is required for pollen germination

• Molybdenum is a part of oxygen evolving complex and participate in splitting of water to liberate oxygen during photosynthesis.

• Glutamate

• Fumarate

• Pyruvate

• Glutamine

During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by

• Carotene

• Cytochrome

• Leghaemoglobin

• Xanthophyll

The products of reaction catalysed by nitrogenase in root nodules of leguminous plants is/are

• Ammonia alone

• Nitrate alone

• Ammonia and oxygen

• Ammonia and hydrogen

Which is essential for the growth of root tip?

• Zn

• Fe

• Ca

• Mn

Which of the following statements will not hold the true if a plant is grown in only sand(S) , only clay (C) and only humus (H)?

• Water availability to the roots will be more in (C) and (H) as compared to (S)

• Ability of roots to penetrate (S) and (H) will be low as compared to (C)

• Nutrient availability to roots will be less in (S) as compared to (C) and (H)

• Oxygen availability to roots will be low in (C) as compared to (S) and (H)