Questions contain STATEMENT-1 (Assertion) and STATEMENT-2 (Reason).Each question has 4 choices (a), (b), (c) and (d) out of which ONLY ONE is correct.
Statement 1 :Cyclic photophosphorylation synthesizes ATP.
Statement 2 :ATP synthesise in cyclic photophosphorylation is not associated with NADPH formation.

Statement- 1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement -1
Statement -1 is True, Statement -2 is True ; Statement-2 is NOT a correct explanation for Statement - 1
Statement - 1 is True, Statement- 2 is False
Both the Statements are False.

Solution

In case of cyclic photophosphorylation, the electron,while passing between ferredoxin and plastoquinone and/or over the cytochrome complex the electron loses sufficient energy to form ATP from ADP and inorganic phosphate.

Questions contain STATEMENT-1 (Assertion) and STATEMENT-2 (Reason).Each question has 4 choices (a), (b), (c) and (d) out of which ONLY ONE is correct.
Statement 1 : Each molecule of ribulose-1, 5-bisphosphate fixes one molecule of CO₂.
Statement 2 : Three molecules of NADPH and two ATP are required for fixation of one molecule of CO₂.

Statement- 1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement -1
Statement -1 is True, Statement -2 is True ; Statement-2 is NOT a correct explanation for Statement - 1
Statement - 1 is True, Statement- 2 is False
Both the Statements are False.

Solution

Each molecule of ribulose-1, 5-biphosphate fixes one molecule of carbon dioxide with the addition of water,thereby resulting in the formation of two molecules of 3-phosphoglyceric acid (3-PGA). The fixation and reduction of one molecule of CO₂ requires three molecules of ATP and two of NADPH, coming from the photochemical reactions.

Consider the following statements regarding photosynthesis.
(1)ATP formation during photosynthesis is termed as photophosphorylation.
(2)Kranz anatomy pertains to leaf.
(3)Reduction of NADP to NADPH occurs during Calvin cycle.
(4)In a chlorophyll molecule magnesium is present in phytoltail.Of the above statements.

(1) and(2) are correct
(3) and (4) are correct
(1) and(3) are correct
(1) and (4) are correct

Which one does not differ between a C₃ and a C₄ plant?
(1)Initial CO₂ acceptor.
(2)Extent of photorespiration.
(3)Enzyme catalyzing reaction that fixes CO₂.
(4)Presence of Calvin cycle.
(5)Leaf anatomy.

(1) and (5)
Only (4)
(2) and (3)
Only (2)

Which of the following statement(s) is/are correct?(1)Light reaction occurs in stroma.(2)Light reaction occurs in grana and ATP + NADPH₂ are formed.(3)In stroma dark reaction occurs.(4)Dark reaction is not directly light driven but is dependent on the products (ATP + NADPH₂) formed in light reaction.

(1), (2) and (4) are correct.
(2), (3) and(4) are correct.
All are correct.
Only (2) is correct.

Match Column – I with Column – II

Column I	Column II
A.Grana of chloroplast	1.Kreb’s cycle
B.Stroma of chloroplast	2.Lightreaction
C.Cytoplasm	3.Dark reaction
D.Mitochondrial matrix	4.Glycolysis

A→4; B→3; C→2; D→1
A→1; B→2; C→4; D→3
A→4; B→1; C→3; D→4
A→2; B→3; C→4; D→1

Study the figure showing graph of light intensity on the rate of photosynthesis.

Match Column – I with Column – II

Column I	Column II
A.Limiting factor in region A	1.Some factor other than light intensity is becoming the limiting factor
B. B represents to	2.Light is no longer limiting factor
C.C represents to	3.Light intensity
D.D represents to	4.Maximum rate of photosynthesis
E.E represents to	5.Saturation point for light intensity

The correct option is –

A→1; B→2; C→3; D→4; E→5
A→3; B→1; C→2; D→5; E→4
A→4; B→2; C→5; D→3; E→1
A→5; B→4; C→3; D→2; E→1

The diagram below shows ATP synthesis through chemiosmosis.

Which option shows the correct labelling of A, B, C and D in the diagram ?

A - F₁, B - Thylakoid membrane,C - Photosystem (I), D - Photosystem (II)
A - F_zero, B - Thylakoid membrane,C - Photosystem (I), D - Photosystem (II)
A - F₁, B - Thylakoid membrane,C - Photosystem (II), D - Photosystem (I)
A - F_zero, B - Thylakoid membrane,C - Photosystem (II), D - Photosystem (I)

The diagram below shows the movement of substances into in and out of a chloroplast with labelling A, B,C & D.

What do labels A to D represent ?

S.No. A B C D

(a) CO₂ ATP H₂O Starch
S.No. A B C D

(a) CO₂ H₂O Sugars O₂
S.No. A B C D

(a) H₂O O₂ CO₂ Sugars
S.No. A B C D

(a) Sugars H₂O ATP O₂

S.No.	A	B	C	D
(a)	CO₂	ATP	H₂O	Starch

S.No.	A	B	C	D
(a)	CO₂	H₂O	Sugars	O₂

S.No.	A	B	C	D
(a)	H₂O	O₂	CO₂	Sugars

S.No.	A	B	C	D
(a)	Sugars	H₂O	ATP	O₂

Study the pathway given below.

Which of the following option is correct ?

S.No. P Q R

(a) C₃ acid Reduction C₄ acid
S.No. P Q R

(b) Fixation C₄ acid Regeneration
S.No. P Q R

(c) C₄ acid Decarboxylation C₃ acid
S.No. P Q R

(d) Carboxylation C₃ acid Reduction

S.No.	P	Q	R
(a)	C₃ acid	Reduction	C₄ acid

S.No.	P	Q	R
(b)	Fixation	C₄ acid	Regeneration

S.No.	P	Q	R
(c)	C₄ acid	Decarboxylation	C₃ acid

S.No.	P	Q	R
(d)	Carboxylation	C₃ acid	Reduction

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