Mineral Nutrition

Which of the following protects nitrogenase inside the root nodule of a leguminous plant?

1. Glutamate dehydrogenase
2. Catalase
3. leg haemoglobin
4. Transaminase

Match Column - I with Column - II. Choose the correct answer from options given below.

1. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
2. (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
3. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
4. (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)

Match the following concerning essential elements and their functions in plants Select the correct option

1. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
2. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
3. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
4. (a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)

The product(s) of reaction catalyzed by nitrogenase in root nodules of leguminous plants is/are

1. Ammonia alone
2. Nitrate alone
3. Ammonia and oxygen
4. Ammonia and hydrogen

Thiobacillus is a group of bacteria helpful in carrying out :

1. Nitrification
2. Denitrification
3. Nitrogen fixation
4. Chemoautotrophic fixation

Which of the following elements is responsible for maintaining turgor in cells?

1. Sodium
2. Calcium
3. Magnesium
4. Potassium

In which of the following forms is iron absorbed by plants?

1. Ferrous
2. Both ferric and ferrous
3. Ferric
4. Free element

In which of the following all three are macronutrients?

1. Molybdenum, magnesium, manganese
2. Nitrogen, phosphorus, sulphur
3. Boron, Zinc, manganese
4. Iron, copper, molybdenum

Which is essential for the growth of root tip?

1. Zn
2. Fe
3. Ca
4. Mn

The oxygen evolved during photosynthesis, comes from water molecules. Which one of the following pairs of elements is involved in this reaction?

1. Magnesium and Molybdenum
2. Magnesium and Chlorine
3. Manganese and chlorine
4. Manganese and Potassium