List the events taking place in the photo-chemical phase of Photosynth

1.	List the events taking place in the photo-chemical phase of Photosynthesis.
Answer» Photochemical phase of photosynthesis is light dependent. A series of chemical reactions occur in quick succession initiated by light, therefore the phase is called photochemical phase. It takes place in chlorophyll-containing thylakoids of chloroplast. It occurs in following steps : 1. The chlorophyll on exposure to light energy becomes activated by absorbing photons. 2. This energy is used in splitting the water molecules (photolysis) as below :- H₂O ——> H⁺ + OH^– 3. OH^– ions through a series of steps produce water (H₂O) and oxygen (O₂). Water may be used inside the plant but O₂ released into the atmosphere. 4. H⁺ combines with CO₂ in dark reaction to produce glucose.

List the events taking place in the photo-chemical phase of Photosynthesis.

Answer»

Photochemical phase of photosynthesis is light dependent. A series of chemical reactions occur in quick succession initiated by light, therefore the phase is called photochemical phase. It takes place in chlorophyll-containing thylakoids of chloroplast.

It occurs in following steps :

1. The chlorophyll on exposure to light energy becomes activated by absorbing photons.

2. This energy is used in splitting the water molecules (photolysis) as below :-

H₂O ——> H⁺ + OH^–

3. OH^– ions through a series of steps produce water (H₂O) and oxygen (O₂). Water may be used inside the plant but O₂ released into the atmosphere.

4. H⁺ combines with CO₂ in dark reaction to produce glucose.

Discussion

No Comment Found

Related InterviewSolutions

Complete girdling ultimately kills the tree due toA. Starvation of rootB. Stoppage of photosynthesisC. Non-movement of mineralsD. Non-movement of water.
A tree is believed to be releasing oxygen during night time. Do you believe the truthfulness of this statement? Justify your answer by giving reasons?
Which would do maximum harm to a tree?(a) Loss of half of its branches (b) Loss of half of its flowers(c) Loss of all of its leaves (d) Loss of a little bark
NADP is expanded as:(a) Nicotinamide, adenosi ne dinucleotide phosphate(b) Nicotinamide, adenine dinucleotide phosphate(c) Nicotinamide, adenine dinucleous phosphate(d) Nicotinamide, adenosine dinudeous phosphate
A plant is kept in a dark cupboard for about 48 hours before conducting any experiment on photosynthesis to:(a) Remove starch from the plant(b) Ensure that starch is not translocated from the leaves(c) Remove chlorophyll from the leaf of the plant(d) Remove starch from the experimental leaf
The main difference between chlorophyll ‘a’ and ‘b’ is:(a) Chlorophyll ‘a’ is a linear chain compound and ‘b’ is b ranched chain(b) Chlorophyll ‘a’ has no Mg ion in centre of molecule(c) In chlorophyll ‘a’ there is — CH3 group whereas in ‘b’ it is — CHO group(d) All of the above
Plants do not store carbohydrate as glucose but do so as starch because glucoseA. Is unstableB. Attracts herbivoresC. Will change nucleic acidsD. Alters osmotic balance.
Compensation point means the condition:(a) When the entire food manufactured in photosynthesis remains unutilised(b) When the pot is watered just to meet the full requirement of the plant(c) When rate of photosynthesis is equal to rate of respiration(d) Where there is neither photosynthesis nor respiration.
`ETC` of photosynthesis process isA. Bound to thylakoid membraneB. Present in stromaC. Bound to outer chloroplast membraneD. Dispersed in sytosol.
Which one is photophosphorylationA. `ADP+AMP overset("Light energy")(rarr) ATP`B. `ADP+" Inorganic phosphate" overst("Light energy")(rarr) ATP`C. `ADP+" Inorganic" PO_(4) rarr ATP`D. `AMP+" Inorganic" PO_(4) overset("Light energy")(rarr) ATP`.