Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: In gymnosperms the pollen grains are released from the microsporangium and carried by air currents.
Reason R: Air currents carry the pollen grains to the mouth of the archegonia where the male gametes are discharged and pollen tube is not formed.
In the light of the above statemnents, choose the correct answer from the options given below:

(1). Both A and R are true but R is NOT the correct explanntion of A
(2). A is true but R is false.
(3). A is false but R is true.
(4). Both A and R are true and R is the correct explanation of A.

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

What is the role of large bundle sheath cells found around the vascular bundles in C₄ plants?

(1). To provide the site of photorespiratory pathway
(2). To increase the number of chloroplast for the operation of Calvin cycle
(3). To enable the plant to tolerate high temperature
(4). To protect the vascular tissue from high light intensity

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Match List I with List II:

Choose the option with all correct matches

(1). A-I, B-IV, C-III, D-II
(2). A-III, B-IV, C-II, D-I
(3). A-III, B-I, C-II, D-IV
(4). A-I, B-lI, C-IV, D-III

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Which of the following statements about RuBisCO is true?

(1). It catalyzes the carboxylation of RuBP.
(2). It is active only in the dark.
(3). It has higher affinity for oxygen than carbon digxide.
(4). It is an enzyme involved in the photolysis of water.

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Which of the following are required for the dark reaction of photosynthesis?
A. Light
B. Chlorophyll
C. CO₂
D. ATP
E. NADPH
Choose the correct answer from the options given below:

(1). C, D and E only
(2). D and E only
(3). A, B and C only
(4). B, C and D only

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

How many molecules of ATP and NADPH are required for every molecule of CO₂ fixed in the Calvin cycle?

(1). 3 molecules of ATP and 3 molecules of NADPH
(2). 3 molecules of ATP and 2 molecules of NADPH
(3). 2 molecules of ATP and 3 molecules of NADPH
(4). 2 molecules of ATP and 2 molecules of NADPH

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Given below are two statements:
Statement I: In C₃ plants, some O₂ binds to RuBisCO, hence CO₂ fixation is decreased.
Statement II: In C₄ plants, mesophyll cells show very little photorespiration while bundle sheath cells do not show photorespiration
. In the light of the above statements, choose the correct answer from the options given below:

(1). Statement I is true but Statement II is false
(2). Statement I is false but Statement II is true
(3). Both Statement I and Statement II are true
(4). Both Statement I and Statement II are false

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

How many ATP and NADPH₂ are required for the synthesis of one molecule of Glucose during Calvin cycle ?

(1). 18 ATP and 12 NADPH₂
(2). 12 ATP and 16 NADPH₂
(3). 18 ATP and l6 NADPH₂
(4). 12 ATP and 12 NADPH₂

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Which micronutrient is required for splitting of water molecule during photosynthesis?

(1). molybdenum
(2). magnesium
(3). copper
(4). manganese

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

The reaction centre in PS II has an absorption maxima at

(1). 700 nm
(2). 660 nm
(3). 780 nm
(4). 680 nm

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Given below are two statements:
Statement I : The primary CO₂ acceptor in C₄ plants is phosphoenolpyruvate and is found in the mesophyll cells.
Statement II : Mesophyll cells of C, plants lack RuBisCo enzyme.
In the light of the above statements, choose the correct answer from the options given below:

(1). Both Statenment I and Statement II are correct
(2). Both Statenent I and Statement II are incorrect
(3). Statement I is correct but Statement II is incorrect
(4). Statement I is incorrect but Statement II is correct

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Which one of the following is not true regarding the release of energy during ATP synthesis through chemiosmosis?
It involves:

(1). Breakdown of proton gradient
(2). Breakdown of electron gradient
(3). Movement of protons across the membrane to the stroma
(4). Reduction of NADP to NADPH, on the stroma side of the membrane

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

The first stable product of C0₂ fixation in sorghum is:

(1). Pyruvic acid
(2). Oxaloacetic acid
(3). Succinic acid
(4). Phosphoglyceric acid

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Which of the following statements is incorrect?

(1). Both ATP and NADPH + H⁺ are synthesized during non-cyclic photophosphorylation.
(2). Stroma lamellae have PS I only and lack NADP reductase.
(3). Grana lamellae have both PS I and PS II.
(4). Cyclic photophosphorylation involves both PS I and PS II.

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

The oxygenation activity of RuBisCo enzyme in photorespiration leads to the formation of:

(1). 1 molecule of 3-C compound
(2). 1 molecule of 6-C compound
(3). 1 molecule of 4-C compound and 1 molecule of 2-C compound
(4). 2 molecules of 3-C compound

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

In light reaction, plastoquinone facilitates the transfer of electrons from:

(1). Cytb₆f complex to PS-I
(2). PS-I to NADP⁺
(3). PS-I to ATP synthase
(4). PS-Il to Cytb1₆f complex

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

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

(1). Oxygen
(2). NADPH
(3). NADH
(4). ATP

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Oxygen is not produced during photosynthesis by

(1). Chara.
(2). Cycas.
(3). Nostoc.
(4). Green sulphur bacteria.

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Which of the following organisms are known as chief producers in the oceans ?

(1). Euglenoids
(2). Cyanobacteria
(3). Diatoms
(4). Dinoflagellates

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

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

(1). Tomato is a greenhouse crop which can be grown in CO₂ -enriched atmosphere for higher yield.
(2). Light saturation for CO₂ fixation occurs at 10% of full sunlight.
(3). Increasing atmospheric CO₂ concentration upto 0.05% can enhance CO₂fixation rate.
(4). C₃ plants responds to higher temperatures with enhanced photosynthesis while C₄ plants have much lower temperature optimum.

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Phosphoenol pyruvate (PEP) is the primary CO₂ acceptor in

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

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

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). C₄
(2). CAM
(3). Nitrogen-fixer
(4). C₃

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

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

(1). two photosystems operating simultaneously
(2). photophosphorylation and cyclic electron transport
(3). oxidative phosphorylation
(4). photophosphorylation and non-cyclic electron transport

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

In a chloroplast the highest number of protons are found in

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

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02