Chapter 13

Photosynthesis is a (a) Physical process (b) Chemical process (c) Physico-chemical process (d) Physiological process

All living forms on earth depend on _________ for energy. (a) Sun (b) Hydrothermal vent (c) Volcanic eruption (d) Moon

Photosynthesis is important because (a) It is the primary source of all food on earth (b) It is responsible for the release of \(\mathrm{O}_{2}\) (c) Both (a) and (b) (d) None of these

Photosynthesis is important because (a) It is the primary source of all food on earth (b) It is responsible for the release of \(\mathrm{O}_{2}\) (c) Both (a) and (b) (d) None of these

Select the incorrect statement from the following: (a) All animals including human depend on plant for their food. (b) The use of energy from sunlight by plants doing photosynthesis is the basis of life on earth. (c) Green plants carry out photosynthesis. (d) None of the above

Which of the following is required for photosynthesis? (a) \(\mathrm{CO}\), (b) Chlorophyll (c) Light (d) All of these

An experiment using two leaves, a variegated leaf or a leaf that was covered with black paper and one that was exposed to light on testing these leaves for starch shows that photosynthesis occurs only in _________ part of leaf in the_________ of sunlight (a) non-green, presence (b) green, presence (c) non-green, absence (d) green, absence

Half leaf experiment proved that _________ is required for photosynthesis. (a) Carbon dioxide (b) Chlorophyll (c) Light (d) Oxygen

Which of the following substance is used in half leaf experiment to absorb \(\mathrm{CO}_{2} ?\) (a) \(\mathrm{HCl}\) (b) \(\mathrm{KOH}\) (c) \(\mathrm{HNO}_{3}\) (d) \(\mathrm{H}_{2} \mathrm{SO}_{4}\)

_________ in 1770 performed a series of experiments that revealed the essential role of air in growth of green plants (a) Jan Ingenhousz (b) Joseph Priestley (c) Von Sachs (d) Cornelius Van Niel

Bell Jar experiment was performed by (a) Jan Ingenhousz (b) Joseph Priestley (c) Von Sachs (d) Cornelius Van Niel

Find the method used to light the candle in bell jar experiment without disturbing the setup. (a) Removing bell jar slowly and light the candle (b) Creating a hole in bell jar (c) Using hand lens (d) Through a sudden replacement by another enlightened candle

Who proved that light is essential for plant process that purifies foul air by placing priestly and setup once in light and once in dark? (a) Jan Ingenhousz (b) Joseph Priestley (c) Von Sachs (d) Cornelius Van Niel

Which of the following proved that green part could release \(\mathrm{O}_{2}\) by his experiment on an acquatic plant? (a) Jan Ingenhousz (b) Joseph Priestley (c) Von Sachs (d) Cornelius Van Niel

The stored form of glucose in plant is (a) Inulin (b) Sucrose (c) Starch (d) Glycogen

Who provided the evidence for the production of glucose when plants grow? (a) Jan Ingenhousz (b) Joseph Priestley (c) Von Sachs (d) Cornelius Van Niel

Von Sachs studies shows that (a) Green substance in plants is located in special bodies within the plant cell. (b) Glucose is made in green part of plant. (c) Glucose is usually stored as starch. (d) All the above

The first action spectrum of photosynthesis is described often as an experiment of (a) Jan Ingenhousz (b) Joseph Priestley (c) Von Sachs (d) Engelmann

Which of the following is incorrect about the experiment performed by T. W. Engelmann? (a) Cladophora (a green algae) is used. (b) Suspension of aerobic bacteria is used. (c) Bacteria accumulated mainly in the region of orange and green part of the light spectrum. (d) Prism was used to split light into its spectral component.

A first action spectrum of photosynthesis was described on the basis of experiment performed by T. W. Engelmann on _________ algae. (a) Green (b) Red (c) Brown (d) All of these

Which of the following pigments resemble the action spectrum produced on the basis of Engelmann experiment? A. Chlorophyll a B. Chlorophyll b C. Xanthophyll D. Carotenoids (a) \(\mathrm{A}\) and \(\mathrm{C}\) only (b) A and B only (c) Only A (d) \(\mathrm{C}\) and \(\mathrm{D}\) only

Who demostrated that photosynthesis is essentially a light-dependent reaction in which hydrogen from a suitable oxidizable compound reduces \(\mathrm{CO}_{2}\) to carbohydrates? (a) Engelmann (b) Von Sachs (c) C. B. Van Niel (d) Jan Ingenhousz

Van Neil was a (a) Physicist (b) Microbiologist (c) Biochemist (d) Chemist

Which of the following reaction expresses Van Niel reaction for photosynthesis? (a) \(\mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O} \stackrel{\text { Light }}{\longrightarrow}\left[\mathrm{CH}_{2} \mathrm{O}\right]+\mathrm{O}_{2}\) (b) \(2 \mathrm{H}_{2} \mathrm{~A}+\mathrm{CO}_{2} \stackrel{\text { Light }}{\longrightarrow} 2 \mathrm{~A}+\mathrm{CH}_{2} \mathrm{O}+\mathrm{H}_{2} \mathrm{O}\) (c) \(6 \mathrm{CO}_{2}+12 \mathrm{H}_{2} \mathrm{O} \stackrel{\text { Light }}{\longrightarrow} \mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}+6 \mathrm{H}_{2} \mathrm{O}+6 \mathrm{O}_{2}\) (d) \(6 \mathrm{CO}_{2}+6 \mathrm{H}_{2} \mathrm{O}\) Light \(\longrightarrow \mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}+6 \mathrm{O}_{2}\)

What are the probable oxidation production of \(\mathrm{H}_{2} \mathrm{~S}\) in purple and green sulphur bacteria? (a) Sulphur (b) Sulphate (c) Both (a) and (b) (d) None of these

The correct equation of photosynthesis is (a) \(\mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O} \stackrel{\text { Light }}{\longrightarrow}\left[\mathrm{CH}_{2} \mathrm{O}\right]+\mathrm{O}_{2}\) (b) \(2 \mathrm{H}_{2} \mathrm{~A}+\mathrm{CO}_{2} \stackrel{\text { Light }}{\longrightarrow} 2 \mathrm{~A}+\mathrm{CH}_{2} \mathrm{O}+\mathrm{H}_{2} \mathrm{O}\) (c) \(6 \mathrm{CO}_{2}+12 \mathrm{H}_{2} \mathrm{O} \stackrel{\text { Light }}{\longrightarrow} \mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}+6 \mathrm{H}_{2} \mathrm{O}+6 \mathrm{O}_{2}\) (d) \(6 \mathrm{CO}_{2}+6 \mathrm{H}_{2} \mathrm{O}\) Light \(\longrightarrow \mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}+6 \mathrm{O}_{2}\)

By using a _________ isotope it can be proved that O2 is released from water during photosynthesis (a) Radioactive (b) Heavy (c) Both (a) and (b) (d) None of these

Photosynthesis is a (a) Single-step process (b) Two-step process (c) Three-step process (d) Multi-step process

Photosynthesis occurs in (a) Green leaf (b) Green stem (c) Guard cells (d) All of these

Within chloroplast, the membranous system is made up of (a) Grana (b) Stroma lamellae (c) Stroma (d) Both (a) and (b)

Calvin cycle is termed as dark reaction because it (a) Is not dependent on light for \(\mathrm{CO}_{2}\) fixation in stroma (b) Occurs in dark (c) Is by convention only (d) Requires light

Where does light reaction occur in chloroplast? (a) Membrane system (grana) (b) Stroma (c) Both (a) and (b) (d) None of these

Which of the following is correct about light reaction? (a) Light is required (b) ATP is produced during reaction (c) NADPH is produced during reaction (d) All of these

Find out the incorrect statement from the following: (a) Dark reaction depends on the product formed by light reaction. (b) In stroma, enzymatic reactions incorporates \(\mathrm{CO}_{2}\) into the plant leading to the synthesis of sugar. (c) Purple and green sulphur bacteria use \(\mathrm{H}_{2} \mathrm{~S}\) as hydrogen donor. (d) There is no division of labour in chloroplast.

The chief pigment associated with photosynthesis is (a) Chlorophyll b (b) Chlorophyll a (c) Xanthophyll (d) Carotenoid

Which light is absorbed more by Chlorophyll 'a'? (a) Yellow and green (b) Red and blue (c) Yellow and orange (d) Yellow and red

Light reaction and photochemical phase includes (a) Light absorption (b) Water splitting and release of oxygen (c) ATP and NADPH formation (d) All of these

Which of the following is incorrect about photosystem? (a) There are two photosystem (PS I and PS II). (b) PS I and PS II are named in sequence of their discovery. (c) LHC is made up of hundred of pigment molecules which are bounded proteins. (d) Each photosystem has all the pigments (Except one molecule of chlorophyll 'b').

Select the correct sequence of electron transfer in Z-scheme of light reaction: (a) \(\mathrm{e}^{-}\) Acceptor \(\rightarrow\) ETS (made of cytochrome) \(\rightarrow\) PSII \(\rightarrow\) NADP \(^{+} \rightarrow\) PSI \(\rightarrow \mathrm{e}^{-}\) Acceptor (b) PSII \(\rightarrow \mathrm{e}^{-}\) Acceptor \(\rightarrow\) ETS (made of cytochrome) \(\rightarrow\) PSI \(\rightarrow \mathrm{e}^{-}\) Acceptor \(\rightarrow\) NADP \(^{+}\) (c) ETS (made of cytochrome) \(\rightarrow\) PSI \(\rightarrow \mathrm{e}^{-}\) Acceptor \(\rightarrow\) PSII \(\rightarrow \mathrm{e}^{-}\) Acceptor \(\rightarrow\) NADP \(^{+}\) (d) \(\mathrm{e}^{-}\) Acceptor \(\rightarrow\) PSI \(\rightarrow\) PSII \(\rightarrow \mathrm{e}^{-}\) Acceptor \(\rightarrow\) ETS (made of cytochrome) \(\rightarrow\) NADP \(^{+}\)

Where water splitting complex associated with PS II is situated? (a) Inner side of chloroplast outer membrane (b) Inner side of thylakoid membrane (c) Outer side of thylakoid membrane (d) Inner side of chloroplast outer membrane

Where are the protons and \(\mathrm{O}_{2}\) formed likely to be released? (a) Lumen of thylakoid (b) Outside of thylakoid membrane (c) In stroma (d) None of these

Phosphorylation occurs in (a) Mitochondria (b) Chloroplast (c) Cytoplasm (d) All of these

Oxidative phosphorylation occurs in (a) Mitochondria (b) Chloroplast (c) Cytoplasm (d) All of these

The place where cyclic flaw of electrons occur: (a) Thylakoid of grana (b) Stroma (c) Stroma lamellae (d) All of these

Stroma lamellae lacks all except (a) PS II (b) NADP reductase (c) PS I (d) Water splitting complex

Which of the following is incorrect about cyclic photophosphorylation? (a) Only PS I is involved. (b) It occurs only when light of wavelength beyond \(680 \mathrm{~nm}\) is available for excitation. (c) Only synthesis of ATP occurs. (d) Synthesis of NADPH \(+\mathrm{H}^{+}\) occurs.

What is the processes that creates proton gradient across thylakoid membrane? (a) Splitting of water molecule on inner side of membrane (towards lumen). (b) \(\mathrm{H}^{+}\) carrier transport \(\mathrm{H}^{+}\) ion from stroma to lumen. (c) NADH reductase removes \(\mathrm{H}^{+}\) ion from stroma for reduction of NADP \(^{+}\). (d) All the above

During light reaction (a) \(\mathrm{pH}\) of stroma \(\downarrow \mathrm{es}\) (b) \(\mathrm{pH}\) of lumen \(\uparrow\) es (c) \(\mathrm{pH}\) of lumen \(\downarrow\) es (d) \(\mathrm{pH}\) of stroma has no effect

Which acts as a transmembrane channel? (a) \(\mathrm{F}_{0}\) of ATPase (b) \(\mathrm{F}_{1}\) of ATPase (c) Both (a) and (b) (d) None of these

Chemiosmosis requires (a) Membrane (b) Proton pump (c) Proton gradient (d) All of these