As compared to sun plants, the plants, which are adopted to low light intensity possess

• more extended root system

• very high rate of CO₂ fixation

• larger photosynthetic units

• more extended shoot system

Calvin cycle takes place in

• grana

• stroma

• intra thylakoid

• matrix

The maximum elements found in cytoplasm is

• C

• He

• H

• N

First transistory chemical formed by reaction between CO₂ and RUBP is

• PGA

• PGAL/ GAP

• dihydroxy acetone phosphate

• 2 carboxy, 3-keto, 1-5 biphosphoribotol

How many pigment molecules constitute a single photosystem?

• 2500

• 250-400

• 2000

• 2

Which of the following inhibits O₂ release in light phase?

• Zeatin

• PMA

• DCMU

• None of these

The carboxylating enzyme present in bundle sheath cells of maize leaves is

• RUBP carboxylase

• hexokinase

• carbonic anhydrase

• PEP-carboxylase

Glycolate accumulates in chloroplast there is

• low CO₂

• high CO₂

• bright light

• low temperature

Which of the following is formed in light reaction of photosynthesis?

• ATP

• NADPH₂

• O₂

• All of the above

Oxygen released in photosynthesis comes outby

• photophosphorylation

• photolysis of water

• photorespiration

• Kelvin cycle