Which one of the following is resistant to enzyme action?
The oxygen evolved during photosynthesis comes from water molecules. Which one of the following pairs of elements is involved in this reaction?
Manganese and Chlorine
Manganese and Potassium
Magnesium and Molybdenum
Magnesium and Chlorine
In photosystem-I, the first electron acceptor is
An iron sulphur protein
Read the following four statements:
I. Both, photophosphorylation and oxidative phosphorylation involve uphill transport of protons across the membrane.
II. In dicot stems, a new cambium originates from cells of pericycle at the time of secondary growth.
III. Stamens in flowers of Gloriosa and Petunia are polyandrous.
IV. Symbiotic nitrogen fixers occurs in free-living state also in soil.
How many of the above statements are right
In Kranz anatomy, the bundle sheath cells have
thin walls, many intercellular spaces and no chloroplasts
thick walls, no intercellular spaces and a large number of chloroplasts
thin walls, no intercellular spaces and several chloroplasts
thick walls, many intercellular space and few chloroplasts