Photosynthesis in Higher Plants

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

1. photophosphorylation and cyclic electron transport
2. oxidative phosphorylation
3. photophosphorylation and non-cyclic electron transport
4. two photosystems operating simultaneously.

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

1. CAM
2. Nitrogen fixer
3. C3
4. C4

The process which makes major difference between C3 and C4 plants is

1. glycolysis
2. Calvin cycle
3. photorespiration
4. respiration.

In photosynthesis, the light-independent reactions take place at

1. photosystem II
2. stromal matrix
3. thylakoid lumen
4. photosystem I.

Bundle sheath cells :

1. lack both RuBisCo and PEP carboxylase
2. are rich in PEP carboxylase
3. are rich in RuBisCo
4. lack RuBisCo

Read the following four statements (A – D). How many of the above statements are right?

1. Two
2. Three
3. Four
4. One

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

1. transpiration
2. glycolysis
3. photosynthesis
4. photorespiration.

The correct sequence of cell organelles during photorespiration is

1. chloroplast, Golgi-bodies, mitochondria
2. chloroplast, rough endoplasmic reticulum, dictyosomes
3. chloroplast, peroxisome, mitochondria
4. chloroplast, vacuole, peroxisome.

In Kranz anatomy, the bundle sheath cells have

1. thin walls, many intercellular spaces and no chloroplasts
2. thick walls, no intercellular spaces and large number of chloroplasts
3. thin walls, no intercellular spaces and several chloroplasts
4. thick walls, many intercellular spaces and few chloroplasts.

CAM helps the plants in

1. conserving water
2. secondary growth
3. disease resistance
4. reproduction.