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Photosynthesis in Higher Plants · Question 39

AIPMT 2012 (Mains)MCQHard📈 Topic in 38% papers+4−1
1

Read the following four statements (A – D). How many of the above statements are right?

  1. Two
  2. Three
  3. Four
  4. One

Answer

(1) Two

Solution

(A) In both photophosphorylation and oxidative phosphorylation, protons are pumped across the membrane against their concentration gradient (uphill), creating the gradient used by ATP synthase. ⇒ Right.

(B) As per NCERT, in dicot stems the interfascicular cambium arises from cells of the medullary rays; the cork cambium arises from the cortex. Cambium from pericycle cells is formed in dicot roots. ⇒ Wrong.

(C) Gloriosa (Liliaceae) has six free stamens, but in Petunia (Solanaceae) the stamens are epipetalous (attached to the petals). ⇒ Wrong.

(D) Symbiotic nitrogen fixers such as Rhizobium and Frankia also live free in the soil, but fix nitrogen only as symbionts. ⇒ Right.

∴ Two statements (A and D) are right.

Answer: (1)

AIPMT 2012 (Mains)

Keep practising — Photosynthesis in Higher Plants

2

A process that makes important difference between C3 and C4 plants is

  1. transpiration
  2. glycolysis
  3. photosynthesis
  4. photorespiration.
AIPMT 2012 (Prelims)
3

The correct sequence of cell organelles during photorespiration is

  1. chloroplast, Golgi-bodies, mitochondria
  2. chloroplast, rough endoplasmic reticulum, dictyosomes
  3. chloroplast, peroxisome, mitochondria
  4. chloroplast, vacuole, peroxisome.
AIPMT 2012 (Prelims)
4

In Kranz anatomy, the bundle sheath cells have

  1. thin walls, many intercellular spaces and no chloroplasts
  2. thick walls, no intercellular spaces and large number of chloroplasts
  3. thin walls, no intercellular spaces and several chloroplasts
  4. thick walls, many intercellular spaces and few chloroplasts.
AIPMT 2011 (Mains)
5

CAM helps the plants in

  1. conserving water
  2. secondary growth
  3. disease resistance
  4. reproduction.
AIPMT 2011 (Prelims)
6

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)
7

Kranz anatomy is one of the characteristics of the leaves of

  1. potato
  2. wheat
  3. sugarcane
  4. mustard
AIPMT 2010 (Mains)
8

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)
9

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

  1. bryophyte
  2. gymnosperm
  3. angiosperm
  4. alga
AIPMT 2010 (Prelims)
10

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)
11

Cyclic photophosphorylation results in the formation of

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

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