PYQSide ExamsMy practice

Photosynthesis in Higher Plants · Question 43

AIPMT 2011 (Prelims)MCQEasy📈 Topic in 12% papers+4−1
1

CAM helps the plants in

  1. conserving water
  2. secondary growth
  3. disease resistance
  4. reproduction.

Answer

(1) conserving water

Solution

CAM (Crassulacean Acid Metabolism) plants, e.g. succulents such as Opuntia and Bryophyllum, keep their stomata closed during the hot day and open them at night.

⇒ CO2 is taken in at night and fixed into malic acid (stored in vacuoles); during the day malic acid releases CO2 for the Calvin cycle while the stomata stay closed.

∴ Water loss by transpiration is greatly reduced, so CAM is an adaptation for conserving water in dry habitats.

Answer: (1)

AIPMT 2011 (Prelims)

Keep practising — Photosynthesis in Higher Plants

2

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)
AIPMT 2010 (Mains)
3

Kranz anatomy is one of the characteristics of the leaves of

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

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)
5

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

  1. bryophyte
  2. gymnosperm
  3. angiosperm
  4. alga
AIPMT 2010 (Prelims)
6

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)
7

Cyclic photophosphorylation results in the formation of

  1. ATP and NADPH
  2. ATP, NADPH and O2
  3. ATP
  4. NADPH.
AIPMT 2009
8

Stroma in the chloroplasts of higher plants contains

  1. light-dependent reaction enzymes
  2. ribosomes
  3. chlorophyll
  4. light-independent reaction enzymes.
AIPMT 2009
9

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

  1. quinone
  2. ferredoxin
  3. cytochrome-b
  4. cytochrome-f
AIPMT 2008
10

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
11

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

All Photosynthesis in Higher Plants PYQs →

PDFDownload Photosynthesis in Higher Plants PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All NEET Botany chapters
Class 11The Living WorldBiological ClassificationPlant KingdomMorphology of Flowering PlantsAnatomy of Flowering PlantsCell: The Unit of LifeCell Cycle and Cell DivisionTransport in PlantsMineral NutritionPhotosynthesis in Higher PlantsRespiration in PlantsPlant Growth and Development
Class 12Reproduction in OrganismsSexual Reproduction in Flowering PlantsPrinciples of Inheritance and VariationMolecular Basis of InheritanceStrategies for Enhancement in Food ProductionMicrobes in Human WelfareOrganisms and PopulationsEcosystemBiodiversity and ConservationEnvironmental Issues
Other chaptersBiomolecules (Biology)