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 Multiple Choice QuestionsMultiple Choice Questions

1.

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

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2.

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

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3.

Specialised epidermal cells surrounding the guard cells are called

  • sunbsidiary cells

  • bulliform cells

  • lenticels

  • lenticels

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4.

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

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5.

Chromatophores take part in

  • Photosynthesis

  • Growth

  • Movement 

  • Movement 


A.

Photosynthesis

Chromatophores are found in members of phototrophic bacteria. They contain bacteriochlorophyll pigments and carotenoids and take part in photosynthesis. In purple bacteria, such as Rhodospirillum rubrum, the light-harvesting proteins are intrinsic to the chromatophore membranes. However, in green sulphur bacteria, they are arranged in specialised antenna complexes called chlorosomes. 

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6.

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

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7.

In photosynthesis, the light-independent reactions take place

  • Thylakoid lumen

  • Photosystem I

  • Photosystem II

  • Photosystem II

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8.

Anoxygenic photosynthesis is characteristic of 

  • rhodospirlllum

  • Spirogyra

  • Chlamydomonas

  • Chlamydomonas

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9.

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

  • transpiration

  • glycolysis

  • photosynthesis

  • photosynthesis

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10.

The correct sequence of cell organelles during photorespiration is

  • chloroplast - Golgi bodies - mitochondria

  • chloroplast-rough endoplasmic reticulum -dictyosomes

  • chloroplast-mitochondria-peroxisome

  • chloroplast-mitochondria-peroxisome

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