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Photosynthesis in Higher Plants · Question 44

AIPMT 2010 (Mains)MCQMedium📈 Topic in 38% papers+4−1
1

Read the following four statements, (i), (ii), (iii) and (iv) and select the right option having both correct statements. Statements : (i) Z scheme of light reaction takes place in presence of PS I only. (ii) Only PS I is functional in cyclic photophosphorylation. (iii) Cyclic photophosphorylation results into synthesis of ATP and NADPH2. (iv) Stroma lamellae lack PS II as well as NADP reductase.

  1. (ii) and (iv)
  2. (i) and (ii)
  3. (ii) and (iii)
  4. (iii) and (iv)

Answer

(1) (ii) and (iv)

Solution

(i) Incorrect: the Z scheme (non-cyclic electron transport) needs both PS II and PS I working in series.

(ii) Correct: as per NCERT, when only PS I is functional, the electron is circulated within the photosystem – cyclic photophosphorylation.

(iii) Incorrect: cyclic photophosphorylation results only in the synthesis of ATP, not of NADPH.

(iv) Correct: as per NCERT, the membranes or lamellae of the stroma lack PS II as well as NADP reductase enzyme; hence cyclic flow occurs there.

∴ (ii) and (iv) are correct.

Answer: (1)

AIPMT 2010 (Mains)

Keep practising — Photosynthesis in Higher Plants

2

Kranz anatomy is one of the characteristics of the leaves of

  1. potato
  2. wheat
  3. sugarcane
  4. mustard
AIPMT 2010 (Mains)
3

Study the pathway given below: [figure] In which of the following options correct words for all the three blanks A, B and C are indicated?

  1. A Fixation, B Transamination, C Regeneration
  2. A Decarboxylation, B Reduction, C Regeneration
  3. A Carboxylation, B Decarboxylation, C Reduction
  4. A Fixation, B Decarboxylation, C Regeneration
AIPMT 2010 (Mains)
4

PGA as the first CO2 fixation product was discovered in photosynthesis of

  1. bryophyte
  2. gymnosperm
  3. angiosperm
  4. alga
AIPMT 2010 (Prelims)
5

C4 plants are more efficient in photosynthesis than C3 plants due to

  1. higher leaf area
  2. presence of larger number of chloroplasts in the leaf cells
  3. presence of thin cuticle
  4. lower rate of photorespiration
AIPMT 2010 (Prelims)
6

Cyclic photophosphorylation results in the formation of

  1. ATP and NADPH
  2. ATP, NADPH and O2
  3. ATP
  4. NADPH.
AIPMT 2009
7

Stroma in the chloroplasts of higher plants contains

  1. light-dependent reaction enzymes
  2. ribosomes
  3. chlorophyll
  4. light-independent reaction enzymes.
AIPMT 2009
8

Electrons from excited chlorophyll molecule of photosystem II are accepted first by

  1. quinone
  2. ferredoxin
  3. cytochrome-b
  4. cytochrome-f
AIPMT 2008
9

The C4 plants are photosynthetically more efficient than C3 plants because

  1. the CO2 efflux is not prevented
  2. they have more chloroplasts
  3. the CO2 compensation point is more
  4. CO2 generated during photorespiration is trapped and recycled through PEP carboxylase
AIPMT 2008
10

In leaves of C4 plants malic acid synthesis during CO2 fixation occurs in

  1. bundle sheath
  2. guard cells
  3. epidermal cells
  4. mesophyll cells
AIPMT 2008
11

In the leaves of C4 plants, malic acid formation during CO2 fixation occurs in the cells of

  1. bundle sheath
  2. phloem
  3. epidermis
  4. mesophyll
AIPMT 2007

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