Exam Question for Class 11 Biology Chapter 13 Photosynthesis in Higher Plants
Question. No. of carbons in the primary CO2 fixation product of C4 plant is
Question. In Calvin cycle, RuBisCO incorporates CO2 into ribulose, 1, 5-bisphosphate which rapidly splits into
(a) 2 molecules of 3-PGA
(b) 2 molecules of 2-PGA
(c) 3 molecules of 3-PGA
(d) 3 molecules of 2-PGA
Question. Which is the primary CO2 fixation product in C4 plant?
(a) 3-phosphoglyceric acid
(b) Oxaloacetic acid
(c) Phosphoenol pyruvate
Question. The primary CO2 acceptor in C4 plant is
(b) phosphoenol pyruvate
(c) PEP carboxylase
Question. Fixation of CO2 molecule through Hatch and Slack pathway requires an enzyme called _________ .
(c) RuBP carboxylase
Question. In the leaves of C4 plants, malic acid formation during CO2 fixation occurs in the cells of
(a) bundle sheath
Question. In C4 plants, the process by which C4 acid is converted into C3 acid in the bundle sheath cell is known as
Question. Photorespiration is a wasteful process because
(a) there is no synthesis of sugars.
(b) there is no synthesis of ATP or NADPH.
(c) there is no synthesis of phosphoglycerate.
(d) both (a) and (b)
Question. The principle of limiting factors was proposed by
Statement Type Questions
Question. Which one of the following is incorrect about the activities associated with PS – I and PS – II in non-cyclic photophosphorylation ?
(a) Water is oxidised in PS – II, but not in PS – I.
(b) Photons (light) are needed to activate both PS – I and PS – II.
(c) Photolysis of water, formation of ATP + NADPH + H occur.
(d) Production of NADPH + H+ is associated with PS -II, but not with PS – I.
Question. Which of the following statement is incorrect regarding pigments?
(a) Pigments are substances that have an ability to absorb light, at specific wavelengths.
(b) Chlorophyll b is the chief pigment associated with photosynthesis.
(c) Leaf pigments can be separated by chromatography.
(d) Accessory pigments protect chlorophyll a from photo-oxidation.
Question. Which among the following sentence is incorrect about light reaction?
(a) It is also known as ‘photochemical’ phase.
(b) It includes light absorption, water splitting, oxygen release, and the formation of high-energy chemical intermediates.
(c) Reaction centre consist of single molecule of chl a but 2 molecules of chl b.
(d) The pigments are organised into two discrete photochemical light harvesting complexes (LHC) within PS – I and PS – II.
Question. All of the following statements are incorrect for non-cyclic electron transport system, except
(a) Electron transport between PS -II to PS-I produces ATP by substrate level phosphorylation.
(b) In PS-II, the oxidation of two water molecules produces four electrons, four proteins, & a single O2.
(c) Water is oxidized & electrons are released by PS-I.
(d) PS – II reduces NADP+ to NADPH.
Diagram Type Questions
Question. The given figure of calvin cycle shows the carbon assimilation in C3 plants. Choose the correct labelling of the carbohydrate molecule (Marked as I, II and III) involved in the Calvin cycle.
|(a) RuBP||Triose phosphate||PGA|
|(b) PGA||RuBP||Triose phosphate|
|(c) PGA||Triose phosphate||RuBP|
|(d) RuBP||PGA phosphate||Triose phosphate|
Question. The given figure shows the diagramatic representation of the Hatch & Slack pathway few labelling are marked as P, Q and R.
Which of the following option shows the correct labeling of P,Q, and R ?
Question. The diagram given below shows ATP synthesis through chemiosmosis.
Which option shows the correct labelling of A, B, C and D in the diagram ?
(a) A – F1, B – Thylakoid membrane, C – Photosystem (I), D – Photosystem (II)
(b) A – F0, B – Thylakoid membrane, C – Photosystem (I), D – Photosystem (II)
(c) A – F1, B – Thylakoid membrane,C – Photosystem (II), D – Photosystem (I)
(d) A – F0, B – Thylakoid membrane,C – Photosystem (II), D – Photosystem (I)
Question. Study the given graph which shows the action spectrum of A. Superimposed on B spectrum of chlorophyll a. Identify A & B in the graph.
|(a) Rate of respiration||Action spectrum|
|(b) Rate of respiration||Absorption|
|(c) Rate of photosynthesis||Action spectrum|
|(d) Rate of photosynthesis||Absorption|
Question. Which one of the following correctly identifies X and Y and and their functions in the given figure of chloroplast ?
Critical Thinking Type Questions
Question. The function of water in photosynthesis is to
(a) absorb light energy.
(b) supply electrons in the light dependent reaction.
(c) transport H+ ions in the light independent reactions.
(d) provide O2 for the light-independent reactions.
Question. Cyclic and non-cyclic flow of e– is used in plants to
(a) meet the ATP demands of Calvin-cycle.
(b) avoid producing excess NADPH + H+.
(c) balance ATP and NADPH + H+ ratio in chloroplasts.
(d) All of the above
Question. In a crop field a weedicide is used to remove weeds in order to increase the yield. But the effect of this weedicide is that, it blocks electron transport from photosystem II to photosystem I. This will result in
(a) enhancement of dark reaction.
(b) failure of ATP synthesis.
(c) lack of reduction of NADP+.
(d) both (b) and (c)
Question. Reduction of NADP+ into NADPH during light reaction occurs in stroma because
(a) NADP reductase enzyme is located on the stroma side of membrane.
(b) PS – I reduces NADP+ to NADPH +H+ in the stroma.
(c) The pH of the stroma remains constant.
(d) Both (a) and (b) are correct.
Question. Two groups of isolated thylakoids are placed in an acidic bathing solution so that H+ diffuses into the thylakoids. They are then transferred to a basic bathing solution, and one group is placed in the light, while the other group is kept in the dark.
Select the choice given below that describes what you expect each group of thylakoids to produce.
|In Light||In Dark|
|(b)||ATP, O2||ATP only|
|(c)||ATP, O2, glucose||ATP, O2|
Question. Number of carbons in the primary CO2 fixation products in C3 plant is
Question. Which of the following does not participate in the process of photosynthesis?
(a) Red algae
(b) Green algae
(c) Brown algae
(d) None of these
Question. Photosynthesis is the transformation of
(a) light energy to chemical energy.
(b) chemical energy to light energy.
(c) light energy to kinetic energy.
(d) solar energy to potential energy.
Question. Chlorophyll is suited for the capture of light energy because
(a) certain wavelengths of light raise it to an excited state.
(b) in its excited state chlorophyll gives off electrons.
(c) chlorophyll’s structure allows it to attach to thylakoid membranes.
(d) all of the above
Question. Light reaction of photosynthesis results in the formation of
(b) NADPH + H+
(d) All of these
Question. Breakdown of water during the photosynthesis molecule leads to release of
(a) electron and proton
(b) electron and oxygen
(c) proton and oxygen
(d) electron, proton and oxygen