Photosynthesis in Higher Plants · Question 30

With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?

1. Increasing atmospheric CO2 concentration up to 0.05% can enhance CO2 fixation rate.
2. C3 plants respond to higher temperature with enhanced photosynthesis while C4 plants have much lower temperature optimum.
3. Tomato is a greenhouse crop which can be grown in CO2-enriched atmosphere for higher yield.
4. Light saturation for CO2 fixation occurs at 10% of full sunlight.

Phosphoenol pyruvate (PEP) is the primary CO2 acceptor in

1. C4 plants
2. C2 plants
3. C3 and C4 plants
4. C3 plants

In a chloroplast the highest number of protons are found in

1. intermembrane space
2. antennae complex
3. stroma
4. lumen of thylakoids.

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.