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

Subtopic:  Emerson's Enhancement Experiment |
 64%
NEET - 2016
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In a chloroplast the highest number of protons are found in

1. lumen of thylakoids

2. inter membrane space

3. antenna complex

4. Stroma

Subtopic:  Light Reaction: Electron Transport |
 85%
From NCERT
NEET - 2016
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The oxygen evolved during photosynthesis comes from water molecules. Which one of the following pairs of elements involved in this reaction?

1. Manganese and chlorine

2. Manganese and potassium

3. Manganese and molybdenum

4. Magnesium and chlorine

Subtopic:  Mineral Function |
 72%
From NCERT
NEET - 2015
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In photosynthesis, the light-independent reactions take place at 

1. thylakoid lumen 

2. photosystem l

3. photosystem ll

4. stromal matrix

Subtopic:  Light Reactions :1 | Light Reactions |
 69%
From NCERT
NEET - 2015
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The structures that are formed by stacking of organised flattened membranous sacs in the chloroplasts are 

1. cristae

2. grana

3. stroma lamellae

4. stroma

Subtopic:  Plastids |
 83%
From NCERT
NEET - 2015
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Anoxygenic photosynthesis is characteristic of 

(1) Rhodospirillum

(2) Spirogyra

(3) Chlamydomonas 

(4) Ulva

Subtopic:  Photosynthetic Pigments |
 68%
NEET - 2014
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PGA as the first CO2 fixation was discovered in the photosynthesis of 

(1) bryophyte

(2) gymnosperm

(3) angiosperm

(4) algae

Subtopic:  Light Reaction: Electron Transport | Light Reaction: Photophosphorylation |
 67%
From NCERT
NEET - 2010
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Electrons from excited chlorophyll molecule of photosystem-II are accepted first by

1. cytochrome-b

2. cytochrome-f

3. quinone

4. ferredoxin

Subtopic:  Photosystems |
 62%
NEET - 2008
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In the leaves of C4 -plants malic acid synthesis during CO2 fixation occurs in 

(1) epidermal cells

(2) mesophyll cells

(3) bundle sheath

(4) guard cells

Subtopic:  C4 Plants Examples | Question on C4 Pathway |
 78%
From NCERT
NEET - 2008
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Carbohydrates are commonly found as starch in plant storage organs. Which of the

following five properties of starch (A-E) make it useful as a storage material?

(A) Easily translocated 

(B) Chemically non-reactive

(C) Easily digested by animals

(D) Osmotically inactive

(E) Synthesized during photosynthesis

The useful properties are 

1. (B) and (C)

2. (B) and (D)

3. (A), (C) and (E)

4. (A) and (E)

Subtopic:  Carbohydrates |
 51%
NEET - 2008
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