In plant cells ATP is synthesised in-

  • . mitochondria
  • . chloroplast
  • . mitochondria and chloroplast
  • . in mitochondria during day and in chloroplasts during night.

Non- cyclic photophosphorylation involves –

  • . PS-I
  • . PS-II
  • . PS-I and PS-II
  • . PS-I and LHC.

Where does cyclic photo-phosphorylation takes place?

  • . membranous system of chloroplast
  • . stroma lamellae
  • . grana
  • . stroma

Which of the following is present in membrane of stroma lamellae?

  • . NADP reductase
  • . PS-I
  • . PS-II
  • . water splitting complex.

If only light of wavelength beyond 680 nm is available then which process will remain continue?

  • . cyclic photo-phosphorylation
  • . non-cyclic photo-phosphorylation
  • . ATP and NADPH
  • . evolution of oxygen

Synthesis of ATP from ADP and inorganic phosphate in the presence of light is known as-

  • . phosphorylation
  • . photo-phosphorylation
  • . photorespiration
  • . photooxidation.

The mechanism of ATP synthesis is explained by

  • . Chemiosmotic Hypothesis
  • . Photophosphorylation
  • . Electron Transport Chain
  • . Splitting of Water

ATP synthesis is linked to-

  • . Development of electron gradient
  • . Development of atomic gradient
  • . Development of proton gradient
  • . Flow of electrons across the membrane

The difference in development of proton gradient in photosynthesis and respiration is-

  • . Photosynthesis has thylakoid membrane across which proton gradient is generated
  • . Proton accumulation is inside the membrane of thylakoid.
  • . both a and b
  • . Mitochondrial membrane is involved

What does not cause the proton gradient across the membrane?

  • . Splitting of water
  • . Moving electrons through photosystems
  • . Reduction of NADP
  • . Q cycle

Where does the splitting of water take place?

  • . Stroma
  • . Cytoplasm
  • . Thylakoid lumen
  • . Plasma membrane

The---------- acceptor of -------- which is located------- side of membrane transfers its electron not to an electron carrier but to a ----------. Fill in the blank according to causes of proton gradient in photosynthesis.

  • . Primary, proton, outer, proton carrier
  • . Primary, electron, outer, proton carrier
  • . Terminal, proton, outer, proton carrier
  • . Primary, electron, inner, Hydrogen carrier

Where does exactly the NADP reductase enzyme located?

  • . Thylakoid lumen
  • . Thylakoid luminal side of membrane
  • . Stromal side of thylakoid membrane
  • . Cytoplasm

The protons for the reduction of NADP+ are taken from-

  • . Lumen of Thylakoid
  • . Stroma
  • . Cytoplasm
  • . Matrix

In photosynthesis, what is reduced?

  • . NAD
  • . NADP
  • . NADP+
  • . NADH

Within chloroplast, number of protons is less in which compartment?

  • . Thylakoid membrane
  • . Intermembrane space
  • . Stroma
  • . Matrix

Which of the following acts as a transmembrane channel?

  • . F0 of ATPase
  • . F1 of ATPase
  • . PS I
  • . PS II

F1 of ATPase is located in-

  • . Inner surface of plasma membrane
  • . Outer surface of thylakoid membrane
  • . On the side of thylakoid that faces the stroma
  • . both b and c

When proton motive force degenerates, where does the conformational- changes take place?

  • . F0 of ATPase
  • . F1 of ATPase
  • . PS I
  • . PS II

What does chemiosmosis requires?

  • . membrane, cytosol, protonpump, ATPase and proton gradient
  • . membrane, cytosol, protonpump and H-ions
  • . membrane, protonpump, ATPase and proton gradient
  • . membrane, cytosol, protonpump, ATPase and proton gradient and H-ions

Which enzyme catalyzes the reaction of ATP formation during chemiosmosis?

  • . ATP hydrolase
  • . ATP synthase
  • . ATPase
  • . ATP synthetase

ATP and NADPH produced during photosynthesis, are used in which of the following reactions?

  • . Catabolic
  • . Biosynthetic phase
  • . amphibolic
  • . Hydrolytic phase

Dark reaction depends upon-

  • . Presence of darkness
  • . Presence of light
  • . Products of light reactions
  • . Products of biosynthetic phase

The first dark reaction or CO2 fixation product is-

  • . 3C – Organic Acid
  • . 6C – Organic Acid
  • . 5C – Organic Acid
  • . 1C – Organic Acid

Melvin-Calvin used ------- radioactive in-----studies for the discovery of first CO2 fixation product.

  • . 14C , Fungal photosynthesis
  • . 14C , Algal photosynthesis
  • . 15N , Fungal photosynthesis
  • . 15N , Algal photosynthesis

The first product of C3 and C4 cycle are:

  • . PGA, PGAL
  • . PGA, OAA
  • . PGAL, RuBP
  • . PGAL, OAA

What is the primary acceptor of CO2 in dark reaction?

  • . Ketose sugar
  • . Aldose sugar
  • . Fatty acid
  • . Sucrose

Which of the following is not a step of photosynthesis?

  • . Decarboxylation
  • . Carboxylation
  • . Regeneration
  • . Reduction

Calvin Pathway occurs-

  • . Only C3
  • . Only C4
  • . All photosynthetic plants
  • . only in C2 plants

The most crucial step of Calvin cycle-

  • . Decarboxylation
  • . Carboxylation
  • . Regeneration
  • . Reduction

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