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 Molybdenum

112.

In photosynthesis, the light-independent reactions take place

• Thylakoid lumen

• Photosystem I

• Photosystem II

• Photosystem II

Anoxygenic photosynthesis is characteristic of 

• rhodospirlllum

• Spirogyra

• Chlamydomonas

• Chlamydomonas

A process that makes important difference between C₃ and C₄ plants is

• transpiration

• glycolysis

• photosynthesis

• photosynthesis

The correct sequence of cell organelles during photorespiration is

• chloroplast - Golgi bodies - mitochondria

• chloroplast-rough endoplasmic reticulum -dictyosomes

• chloroplast-mitochondria-peroxisome

• chloroplast-mitochondria-peroxisome

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 

• Two

• Three

• Four

• Four

CAM helps the plants in

• secondary growth

• disease resistance

• reproduction

• reproduction

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

• thin walls, no intercellular spaces and several chloroplasts

Which one of the following is essential for photolysis of  water

• Manganese

• Zinc

• Copper

• Copper

PGA as the first CO₂ fixation product was discovered in photosynthesis of 

• bryophyte

• gymnosperm

• angiosperm

• angiosperm