Where does photolysis of H 2 O occur? What is its significance?

The photolysis of H 2 O occurs in the water-splitting complex of photosystem l that takes place in thylakoid membranes of chloroplasts where light is utilised to break water molecules, as discussed in the equation below: 2H 2 O → 4H + + 4e - + O 2 Significance of photolysis: It helps to liberate the oxygen in the photosynthesis process. It also provides the hydrogen required for the reaction.

Differentiatebetween psl and psll in photosynthesis

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Life Sciences>From Molecules to Organisms: Structures and Processes>Use a model to illustrate how photosynthesis transforms light energy into stored chemical energy.>Organization for Matter and Energy Flow in Organisms - The process of photosynthesis converts light energy to stored chemical energy by converting carbon dioxide plus water into sugars plus released oxygen.

If

^{14} C O_{2}

is added to a suspension of photosynthesizing chloroplasts, which of the following will be the first compound to be radioactive?

EASY

Life Sciences>From Molecules to Organisms: Structures and Processes>Use a model to illustrate how photosynthesis transforms light energy into stored chemical energy.>Organization for Matter and Energy Flow in Organisms - The process of photosynthesis converts light energy to stored chemical energy by converting carbon dioxide plus water into sugars plus released oxygen.

Which of the following biomolecules is common to respiration mediated breakdown of fats, carbohydrates, and proteins?

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Life Sciences>From Molecules to Organisms: Structures and Processes>Use a model to illustrate how photosynthesis transforms light energy into stored chemical energy.>Organization for Matter and Energy Flow in Organisms - The process of photosynthesis converts light energy to stored chemical energy by converting carbon dioxide plus water into sugars plus released oxygen.

The percentage of sunlight captured by plants is

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Life Sciences>From Molecules to Organisms: Structures and Processes>Use a model to illustrate how photosynthesis transforms light energy into stored chemical energy.>Organization for Matter and Energy Flow in Organisms - The process of photosynthesis converts light energy to stored chemical energy by converting carbon dioxide plus water into sugars plus released oxygen.

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

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Life Sciences>From Molecules to Organisms: Structures and Processes>Use a model to illustrate how photosynthesis transforms light energy into stored chemical energy.>Organization for Matter and Energy Flow in Organisms - The process of photosynthesis converts light energy to stored chemical energy by converting carbon dioxide plus water into sugars plus released oxygen.

Which of the following is not a product of a light reaction of photosynthesis?

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Life Sciences>From Molecules to Organisms: Structures and Processes>Use a model to illustrate how photosynthesis transforms light energy into stored chemical energy.>Organization for Matter and Energy Flow in Organisms - The process of photosynthesis converts light energy to stored chemical energy by converting carbon dioxide plus water into sugars plus released oxygen.

The two enzymatic activities associated with RuBisCO are:

EASY

Life Sciences>From Molecules to Organisms: Structures and Processes>Use a model to illustrate how photosynthesis transforms light energy into stored chemical energy.>Organization for Matter and Energy Flow in Organisms - The process of photosynthesis converts light energy to stored chemical energy by converting carbon dioxide plus water into sugars plus released oxygen.

The process which makes a major difference between

C_{3}

and

C_{4}

plants is:

EASY

Life Sciences>From Molecules to Organisms: Structures and Processes>Use a model to illustrate how photosynthesis transforms light energy into stored chemical energy.>Organization for Matter and Energy Flow in Organisms - The process of photosynthesis converts light energy to stored chemical energy by converting carbon dioxide plus water into sugars plus released oxygen.

Z- scheme is connected with ___.

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Life Sciences>From Molecules to Organisms: Structures and Processes>Use a model to illustrate how photosynthesis transforms light energy into stored chemical energy.>Organization for Matter and Energy Flow in Organisms - The process of photosynthesis converts light energy to stored chemical energy by converting carbon dioxide plus water into sugars plus released oxygen.

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

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Life Sciences>From Molecules to Organisms: Structures and Processes>Use a model to illustrate how photosynthesis transforms light energy into stored chemical energy.>Organization for Matter and Energy Flow in Organisms - The process of photosynthesis converts light energy to stored chemical energy by converting carbon dioxide plus water into sugars plus released oxygen.

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 utilization. In which of the following physiological groups would you assign this plant?

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Life Sciences>From Molecules to Organisms: Structures and Processes>Use a model to illustrate how photosynthesis transforms light energy into stored chemical energy.>Organization for Matter and Energy Flow in Organisms - The process of photosynthesis converts light energy to stored chemical energy by converting carbon dioxide plus water into sugars plus released oxygen.

Which statement is wrong for Krebs' cycle?

EASY

Life Sciences>From Molecules to Organisms: Structures and Processes>Use a model to illustrate how photosynthesis transforms light energy into stored chemical energy.>Organization for Matter and Energy Flow in Organisms - The process of photosynthesis converts light energy to stored chemical energy by converting carbon dioxide plus water into sugars plus released oxygen.

Where does photolysis of H₂O occur? What is its significance?

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Life Sciences>From Molecules to Organisms: Structures and Processes>Use a model to illustrate how photosynthesis transforms light energy into stored chemical energy.>Organization for Matter and Energy Flow in Organisms - The process of photosynthesis converts light energy to stored chemical energy by converting carbon dioxide plus water into sugars plus released oxygen.

A chromatography column, packed with silica gel as stationary phase, was used to separate a mixture of compounds consisting of

(A)

benzanilide

(B)

aniline and

(C)

acetophenone. When the column is eluted with a mixture of solvents, hexane:ethyl acetate

(20 : 80)

, the sequence of obtained compounds is:

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Life Sciences>From Molecules to Organisms: Structures and Processes>Use a model to illustrate how photosynthesis transforms light energy into stored chemical energy.>Organization for Matter and Energy Flow in Organisms - The process of photosynthesis converts light energy to stored chemical energy by converting carbon dioxide plus water into sugars plus released oxygen.

Which one of the following options is true in photosynthesis?

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Life Sciences>From Molecules to Organisms: Structures and Processes>Use a model to illustrate how photosynthesis transforms light energy into stored chemical energy.>Organization for Matter and Energy Flow in Organisms - The process of photosynthesis converts light energy to stored chemical energy by converting carbon dioxide plus water into sugars plus released oxygen.

Which of the following statements is incorrect?

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Life Sciences>From Molecules to Organisms: Structures and Processes>Use a model to illustrate how photosynthesis transforms light energy into stored chemical energy.>Organization for Matter and Energy Flow in Organisms - The process of photosynthesis converts light energy to stored chemical energy by converting carbon dioxide plus water into sugars plus released oxygen.

Consider the following statements regarding photosynthesis and respiration in plants and select the correct option.
I.

RuBisCO

has high affinity to oxygen in low

{CO}_{2}

concentration.
II. The Calvin pathway occurs in the chloroplast of bundle sheath cells of

C_{4}

plants.
III. Yeast position themselves when the concentration of alcohol reaches

7 %

.
IV. Oxygen is a final hydrogen acceptor during aerobic respiration.

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Life Sciences>From Molecules to Organisms: Structures and Processes>Use a model to illustrate how photosynthesis transforms light energy into stored chemical energy.>Organization for Matter and Energy Flow in Organisms - The process of photosynthesis converts light energy to stored chemical energy by converting carbon dioxide plus water into sugars plus released oxygen.

In

C_{4}

plants,

C_{3}

cycle takes place in

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Life Sciences>From Molecules to Organisms: Structures and Processes>Use a model to illustrate how photosynthesis transforms light energy into stored chemical energy.>Organization for Matter and Energy Flow in Organisms - The process of photosynthesis converts light energy to stored chemical energy by converting carbon dioxide plus water into sugars plus released oxygen.

Cytochromes are found in:

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Life Sciences>From Molecules to Organisms: Structures and Processes>Use a model to illustrate how photosynthesis transforms light energy into stored chemical energy.>Organization for Matter and Energy Flow in Organisms - The process of photosynthesis converts light energy to stored chemical energy by converting carbon dioxide plus water into sugars plus released oxygen.

How many molecules of ATP are required for the synthesis of 5 molecules of glucose during the Calvin cycle?

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Life Sciences>From Molecules to Organisms: Structures and Processes>Use a model to illustrate how photosynthesis transforms light energy into stored chemical energy.>Organization for Matter and Energy Flow in Organisms - The process of photosynthesis converts light energy to stored chemical energy by converting carbon dioxide plus water into sugars plus released oxygen.

Assertion $(A) :$ In $PS I$ , the reaction centre, chlorophyll 'a' has an absorption peak at $700 nm$ , hence is called $P 700$ , while in $PS II$ , it has absorption maxima at $680 nm$ and is called $P 680$ .

Reason $(R) :$ Calvin pathways occur in all photosynthetic plants, it does not matter where they have $C_{3}$ or $C_{4}$ pathways and the Calvin cycle described in three stages: Carboxylation, reduction and regeneration.

The correct answer is:

Differentiate between psl and psll in photosynthesis.

Important Questions on Use a model to illustrate how photosynthesis transforms light energy into stored chemical energy.

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