A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rate of photosynthesis at high temperatures and has improved efficiency of nitrogen utilisation. In which of the following physiological groups would you assign this plant?

• C₄

• CAM

• Nitogen-fixer

• Nitogen-fixer

Emerson's enhancement effect and red drop have instrumental in the discovery of

• two photosystems operating simultaneously

• photophosphorylation and cyclic electron transport

• oxidative phosphorylation

• oxidative phosphorylation

Specialised epidermal cells surrounding the guard cells are called

• sunbsidiary cells

• bulliform cells

• lenticels

• lenticels

The three boxes in this diagram represent the three major biosynthetic pathways in aerobic net reactant or products



Arrows numbered 4, 8 and 12 can all be

• NADH

• ATP

• H₂O

• H₂O

Chromatophores take part in

• Photosynthesis

• Growth

• Movement 

• Movement 

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

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