CBSE Questions for Class 11 Medical Biology Photosynthesis In Higher Plants Quiz 14 - MCQExams.com

Which one of the following is false about the activities associated with PSI and PSII in noncyclic photophosphorylation?
  • Water is oxidized in PSII, but not PSI
  • Photons(light) are needed to activates both PSI and PSII
  • Photolysis of water formation of ATP$$+$$NADPH$$+$$H occur
  • Production of NADPH$$+ H^+$$ is associated with PSII, not PSI
Who am I?
  • I am ATP producing factory
  • I am single layered, but maintain cellular osmotic pressure
  • I support the cell, but I am not cell wall I have a body resembling net
  • I am chemical factory of the cell
  • Leaves are green because of me
Read the following statements.
i) Chloroplasts get aligned with their flat surface parallel to the cell walls to receive optimum light intensity.
ii) Water is the only electron donor in all photosynthetic organisms.
iii) ATP and NADPH are utilised in Carboxylation stage of Calvin cycle.
iv) Bundle sheath cells are characterized by having a large number of chloroplasts and impervious walls.
v) Law of limiting factors was proposed by Blackmann.
Which of the given statements are CORRECT?
  • (i), (iii) and (iv)
  • (i), (ii) and (iii)
  • (iii), (iv) and (v)
  • (v) only
The total number of ATP produced when one molecule of glucose is partially oxidised into lactic acid is: 
  • 2
  • 10
  • 8
  • 36
In cyclic photophosphorylation the lowest energy electrons are driven out from?
  • $$P_{700}$$
  • $$P_{680}$$
  • PQ
  • PC
How many ATP molecules are produced after complete oxidation of one molecule of fructose-1, 6-bis-phosphate ?
  • 40
  • 32
  • 38
  • 44
Which statement is correct for given reaction for photosynthesis?
$$2H_2A+CO_2\overset{light}{\rightarrow}2A+CH_2O+H_2O$$.
  • H donor is oxidisable substrate
  • $$O_2$$ evolve from $$H_2O$$ if reducible compound is $$H_2O$$
  • Glucose gain its oxygen from $$H_2O$$
  • $$(1)$$ & $$(3)$$ both
How many of the given structures are associated with the thylakoid membrane?
PS II, RuBisCO, LHC, PEPcase, $$F_0$$ of ATP synthase, cytochromes b & f.
  • $$2$$
  • $$3$$
  • $$4$$
  • $$5$$
How many ATP molecules will be produced when one molecule of 3-phosphosphoglyceric acid is completely oxidised : 
  • 16
  • 32
  • 64
  • 48
For experiment showing that $$CO_2$$ is evolved during respiration process in plants - arrange following steps in proper order.
i) Soak gram seeds in water, overnight. Keep them in conical flask.
ii) Close the conical flask with cork fitted with 'U' tube.
iii) Insert test tube with KOH solution in the conical flask.
iv) Keep the set steady for some time.
  • i, ii, iii, iv
  • i, ii, iv, iii
  • i, iii, ii, iv
  • i, iii, iv, ii
In how many of the given plants $$C_3$$ cycle is present in mesophyll cell?
Wheat, Pea, Maize, Pineapple, Agave, Sorghum, Tomato
  • Seven
  • Five
  • Six
  • Two
Plants showing $$C_4$$ pathway are better than the $$C_3$$ plants in
  • Utilisation of water
  • Having photorespiration
  • Producing more yield at very high $$CO_2$$ concentration
  • Being sensitive to high temperatures
Chemiosmotic theory of P. Mitchell explains a general mechanism of energy conservation across?
  • Inner mitochondrial membrane
  • Thylakoid membrane
  • Cell wall
  • More than one option is correct
Find the correct match up:
Column IColumn II
(A)Light reaction(p)Occures in stroma
(B)Photophosphorylat ion(q)Occures in grana
(C)Dark reaction(r)Tapeivonit
(D)Parasitic nutriton(s)Production of ATP an the presence of light
  • A-r. B-p, C-s, D-q
  • A-s, B-q, C-r, D-p
  • A-p, B-r. C-q. D-s
  • A-q. B-s, C-p, D-r
Which of the given is not a component of assimilatory power for dark reaction?
  • ATP
  • NADPH
  • $$CO_2$$
  • Both ATP and NADPH
Photo phosphorylation event take place in:
  • Stroma
  • Stroma lamella
  • Grana lamella
  • 2 and 3 both
What is the site of $$C_3$$ cycle in $$C_3$$ and $$C_4$$ plants?
  • In $$C_3$$ plant - mesophyll cell and In $$C_4$$ plant - Bundle sheath cell
  • In $$C_3$$ plant - Bundle sheath cell and In $$C_4$$ plant - mesophyll cell
  • In $$C_4$$ plant - Bundle sheath cell and In $$C_3$$ plant - Bundle sheath cell
  • In $$C_3$$ plant - mesophyll cell and In $$C_4$$ plant - mesophyll cell
State whether the following statements are true or false. If false, correct them.
Plants produce oxygen during the process of making their own food.
  • True
  • False
In the maize plant, $$CO_2$$ fixation occurs in both mesophyll and bundle sheath cells. The enzymes involved in these cells for the process respectively are,
  • RuBisCO and PEP Kinase
  • PEP Kinase and Pepsin
  • RuBisCO and PEP Carboxylase
  • PEP Carboxylase and RuBisCO
The $$C_4$$ plants are photosynthically more efficient than $$C_3$$ plants because
  • The CO$$_2$$ efflux is not prevented.
  • They have more chloroplasts.
  • The CO$$_2$$ compensation point is more.
  • CO2 generated during photorespiration is trapped and recycled through PEP carboxylase.
Which is correct link reaction?
  • Pyruvic acid $$+NAD^++$$Co-A$$\overset{Pyruvate dehydronase}{\underset{Mg^{++}}{\rightarrow}}$$ Acetyl Co-A$$+$$ NADH$$\cdot H^++CO_2$$
  • Pyruvic acid $$+FAD^++$$Co-A$$\overset{Pyruvate dehydrogenase}{\underset{Mg^++}{\rightarrow}}$$Acetyl Co-A$$+$$ FADH $$\cdot H^++CO_2$$
  • Pyruvic acid $$+NADP^++$$Co-A $$\overset{Pyruvate dehydrogenase}{\underset{Mg^{++}}{\rightarrow}}$$ Acetyl Co-A +NADPH$$\cdot H^++CO_2$$
  • Pyruvic acid $$+NAD^++$$Co-A$$\overset{Pyruvate dehydrogenase}{\underset{Mg^{++}}{\rightarrow}}$$Acetyl Co-A$$+$$NADH$$\cdot H^+$$
The enzyme RuBP caboxylase
  • Activity occurs in $$C_3$$ and $$C_4$$ plants
  • In present in inner thylakoid membrane
  • Is low temperature sensitive enzyme
  • Shows greater affinity for $$O_2$$ than for $$CO_2$$
Who proposed the chemiosmotic theory of oxidative phosphorylation?
  • Krebs
  • Gibbs
  • Mitchell
  • Dixons
The ratio between 3- carbon and 2- carbon intermediates having -$$NH_{2}$$ group formed in photosynthetic oxidation cycle is
  • 1:1
  • 2:1
  • 3:2
  • 3:4
Select the incorrect matched pair with regard to $$C_{4}$$ cycle.
(a)
Primary $$CO_{2}$$ fixation product
-
PGA
(b)
Site of initial carboxylation
-
Mesophyll cells
(c)
Primary $$CO_{2}$$ acceptor
-
PEP
(d)
$$C_{4}$$ plant
-
Maize
(e)
Location of enzyme RuBisCO
-
Bundle sheath cells
  • (a)
  • (b)
  • (c)
  • (d)
  • (e)
Artiplex spongiosa is a 
  • $${C_3 }$$ plant
  • $${C_ 4 }$$ plant
  • CAM plant
  • All of the above
The electron transport chain of photosynthetic process is
  • In the stroma of the chloroplast
  • Bound to the thylakoid membranes
  • Present in the outer membranes of the chloroplast
  • Present on mitochondria
For the synthesis of one glucose molecule, the number of ATP required are
  • 9 ATP for $${C_3}$$ cycle and 20 ATP for $${C_4}$$ cycle.
  • 18 ATP for $${C_3}$$ cycle and 30 ATP for $${C_4}$$ cycle.
  • 22 ATP for $${C_3}$$ cycle and 35 ATP for $${C_4}$$ cycle.
  • 24 ATP for $${C_3}$$ cycle and 36 ATP for $${C_4}$$ cycle.
As compared to a C$$_{3}$$-plant, how many additional molecules of ATP are needed for net production of one molecule of hexose sugar by C$$_{4}$$-plants -
  • Zero
  • Six
  • Two
  • Twelve
$$C_{4}$$ photosynthesis does not occur in
  • Zea mays
  • Saccharum munja
  • Saccharum officinarum
  • Euphorbia splendens
The glycolate metabolism occurs in
  • Lysosomes
  • Ribosomes
  • Glyoxysomes
  • Peroxisomes
Photosynthesis consists of essentially two biological reaction systems, one followed by the other. The second of these systems do which of the following?
  • Fixes $$CO_{2}$$
  • Traps light energy
  • synthesizes starch
  • Works only in the presence of light
Which of the following statement is true with regard to the light reaction of photosynthetic mechanism in plants?
  • Chlorophyll a occurs with peak absorption at 680 nm in photosystem I and at 700 nm in photosystem II.
  • Magnesium and sodium ions are associated with photolysis of water molecules.
  • $${O_2}$$ is evolved during cyclic photophosphorylation.
  • Photosystems I and II are both involved in non-cyclic photophosphorylation.
  • Both ATP and $${NADPH_2}$$ are formed during cyclic photophosphorylation.
As compared to a $${C_3}$$-plants how many additional molecules of ATP are needed for net production of one molecule of a hexose sugar by $${C_4}$$-plants
  • 2
  • 6
  • 0
  • 12
In Panicum maximum and Chloris gayana the $${C_4}$$ pathway is ........... type.
  • PEP-CK
  • $${NADP\pm Me}$$
  • $${NAD\pm Me}$$
  • All of the above
In the following dark reaction of photosynthesis, $${6CO_2+6 H_2 O +A+12 NADPH +H\rightarrow C_6H_{12}O_6+6O_2+B+18 NADP}$$ , A and B stand for
  • 18 ADP, 18 ATP
  • 12 ATP, 18 ATP
  • 18 ATP, 18 ADP
  • 12 ATP, 12 ADP
Which of the following plant is efficient converter of solar energy, whose net productivity is 2 - 4 kg/$${m^2}$$/yr or even higher?
  • Wheat
  • Rice
  • Sugarcane
  • Bajra
Which step of non cyclic photosphorylation is blocked by DCMU?
  • Flow of $$e^-$$ between PS I to FD
  • Flow of $$e^-$$ between cyto $$b_6$$ to cyto f
  • Flow of $$e^-$$ between PC to PS I
  • Flow of $$e^-$$ between PS II to PQ
The correct sequence of cell organelles participating in photorespiration is
  • Chloroplast - Peroxisome - Mitochondria
  • Chloroplast - Vacuole - Peroxisome
  • Chloroplast - Golgi bodies - Mitochondria
  • Chloroplast - Rough endoplasmic reticulum - Dictyosomes
Z-scheme of electrons  transfer involves
  • Bundle sheath cells
  • PS-I
  • PS-II
  • Both (B) and (C)
The exceptional difference between $${C_3}$$ and $${C_4}$$ plants is exhibited by phenomenon
  • Photosynthesis
  • Photorespiration
  • Transpiration
  • Crassulacean metabolism
In addition to the 12 molecules of $$NADPH_2$$ the energy required for the synthesis of one mole of hexose by $$C_3$$ and $$C_4$$ pathway is
  • 18 molecules of ATP
  • 30 molecules of ATP
  • 18 and 30 molecules of ATP respectively
  • 30 and 18 molecules of ATP respectively
Which of the following is the evidence to show that oxygen released in photosynthesis comes from water?
  • Isotopic oxygen $$(O^{18})$$ supplied as $$H_2O$$ appears in the $$O_2$$ released in photosynthesis.
  • Activated chloroplast in water releases $$O_2$$ if supplied potassium ferrocyanide or some other reducing agent in the absence of $$CO_2$$.
  • Photosynthetic bacteria use $$H_2S$$ and $$CO_2$$ to make carbohydrates, $$H_2S$$ and sulphur.
  • All of the above.
The conversion of PGA to PGAL during Calvin cycle is a process of
  • Reduction
  • Oxidation
  • Hydroxylation
  • Isomerization
Which of the following statements correctly describes the light reactions and dark reactions taking place during photosynthesis? 
(i) Light reactions occur in grana thylakoids whereas dark reactions occur in stroma of chloroplasts.
(ii) Light reactions generate ATP and $$\displaystyle NADPH_{2}$$ whereas dark reactions consume ATP and $$\displaystyle NADPH_{2}$$.
(iii) Oxygen is released as a by-product during the light reactions as well as dark reactions.
(iv) Light reactions take place in the presence of light and dark reactions are independent of the products formed during light reactions.
  • (i) and (ii)
  • (iii) and (iv)
  • (i), (ii) and (iv)
  • (ii), (iii) and (iv)
$${CO_2}$$ acceptor during the dark reaction of $${C_3}$$ photosynthesis is 
  • RUBP.
  • PEP.
  • NADPH.
  • ATP.
The structure known as peroxisome is associated with
  • Photosynthesis.
  • Respiration.
  • Photorespiration.
  • Photophosphorylation.
Chemical reaction that takes place during the dark reaction of photosynthesis is called as
  • Photolysis.
  • Hydrolysis.
  • Binding of carbon dioxide with RUBP.
  • Nitrogen fixation.
The number of ATP required in excess to assimilate atmospheric $$CO_2$$ to four molecules of triose phosphates in $$C_4$$ plants as compared to $$C_3$$ plants is
  • 30
  • 36
  • 60
  • 8
Who described $$C_4$$ pathway for first time?
  • Hatch and Slack
  • Robert Hill
  • Hans Krebs
  • Melvin Calvin
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