Objective NCERT at your FINGERTIPS: Biology

NCERT

Chapter 13

Photosynthesis in Higher Plants - all with Video Answers

Educators

Chapter Questions

Problem 1

of complex organic substances from simple esis materials in the presence of sunlight and coganc raW lilled as which is a process.
catabolic
esespiration, añoubolic

Narayan Hari

Narayan Hari

Numerade Educator

Problem 2

4hchone of the following correctly depicts the biochemical padicn for photosynthesis?
(3) $C_{6} \mathrm{H}_{12} \mathrm{O}_{6}+60_{2} \stackrel{\text { Enzymes }}{\longrightarrow} 6 \mathrm{CO}_{2}+6 \mathrm{H}_{2} \mathrm{O}+$ energy
(d) $6 \mathrm{CO}_{2}+6 \mathrm{H}_{2} \mathrm{O} \frac{\text { Sunlight }}{\text { Chlorophyll }} \rightarrow \mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}+6 \mathrm{O}_{2}$
(d) $6 \mathrm{CO}_{2}+12 \mathrm{H}_{2} 0 \frac{\text { Surlight }}{\text { Chlorophyll }}>\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}+6 \mathrm{O}_{2}+6 \mathrm{H}_{2} \mathrm{O}$

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Problem 3

Which one of the following equations suggests that $\mathrm{O}_{2}$ Ifeased during photosynthesis comes from water?
(a) $6\left(0_{2}^{18}+12 \mathrm{H}_{2} \mathrm{O} \rightarrow 6 \mathrm{O}_{2}^{18}+\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}+6 \mathrm{H}_{2} \mathrm{O}^{18}\right.$
(b) $6 \mathrm{CO}_{2}+12 \mathrm{H}_{2} \mathrm{O}^{18} \rightarrow 6 \mathrm{O}_{2}+\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}+6 \mathrm{H}_{2} \mathrm{O}^{18}$
(d) $6 \mathrm{CO}_{2}^{18}+12 \mathrm{H}_{2} \mathrm{O} \rightarrow 60_{2}^{18}+\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}+6 \mathrm{H}_{2} \mathrm{O}$
(c) $6\left[0_{2}+12 \mathrm{H}_{2} 0^{18} \rightarrow 60_{2}^{18}+\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}+6 \mathrm{H}_{2} \mathrm{O}\right.$

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Problem 4

Vsible part of electromagnetic spectrum consists of rodiations having a wavelength in the range of
(a) $400-800 \mathrm{~nm}$
(b) $300-2600 \mathrm{~nm}$
1d) $390-760 \mathrm{~nm}$
(d) $650-760 \mathrm{~nm}$.

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Numerade Educator

Problem 5

indigo and red regions of VIBGYOR, respectively fall in the range of wavelength
(a) $430-470 \mathrm{~nm}$ and $660-760 \mathrm{~nm}$
(0) 300-390 nm and $600-650$ nm
(d) $390-760 \mathrm{~nm}$ and $430-470 \mathrm{~nm}$
(d) $660.760 \mathrm{~nm}$ and $430-470 \mathrm{~nm}$.

Narayan Hari

Numerade Educator

Problem 6

Holl's half-leaf experiment proves that for photosynthesis to take place.
(a) Chorophyll
(b) $\mathrm{CO}_{2}$
(a) light
(d) $\mathrm{H}_{2} \mathrm{O}$

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Problem 7

Who demonstrated that green plants purify the foul air produced by breathing animals and burning candles?
(a) Priestley
(b) Ingenhousz
(c) Sachs
(d) Engelmann

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Numerade Educator

Problem 8

Which of the following scientists concluded by his experiments that green plant parts play a role in purifying the noxious air only in the presence of sunlight?
(a) Priestley
(b) Ingenhousz
(c) Sachs
(d) Engelmann

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Problem 9

Ingenhousz in an experiment showed that in bright sunlight, small bubbles were formed around the green parts of the plant, while in the dark, they did not. He identified these bubbles to be of
(a) $\mathrm{CO}_{2}$
(b) $\mathrm{H}_{2} \mathrm{O}$
(c) $\mathrm{O}_{2}$
(d) $\mathrm{H}_{2}$.

Narayan Hari

Numerade Educator

Problem 10

Who provided the evidence that glucose is formed during photosynthesis and is then stored in the form of starch?
(a) Sachs
(b) Engelmann
(c) Van Niel
(d) Blackmann

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Numerade Educator

Problem 11

Who used prism, green alga Cladophora, and aerobicbacteria and plotted the first action spectrum for photosynthesis?
(a) Sachs
(b) Arnon
(c) Arnold
(d) Encelmann

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Numerade Educator

Problem 12

Photosynthetic pigments such as chl $a$, chl $b$, xanthophyll and carotene can be separated by which of the following techniques?
(a) Paper chromatography
(b) Gel Electrophoresis
(c) $X$-ray diffusion
(d) ELISA test

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Numerade Educator

Problem 13

Who, after conducting experiments on purple and green sulphur bacteria, inferred that $0_{2}$ evolved during photosynthesis comes from $\mathrm{H}_{2} \mathrm{O}$ not from $\mathrm{CO}_{2} ?$
(a) Sachs
(b) Engelmann
(c) Van Niel
(d) Blackmann

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Numerade Educator

Problem 14

Study the following statements regarding chl a molecule.
(i) Molecular formula of $\mathrm{chl} \mathrm{a}$ is $\mathrm{C}_{55} \mathrm{H}_{72} \mathrm{O}_{5} \mathrm{~N}_{4} \mathrm{Mg}$.
(ii) It is the primary photosynthetic pigment.
(iii) In pure state, it is red in colour and thus it absorbs more blue wavelength of light than the red wavelength.
(iv) It is soluble in water as well as petroleum ether. Which of the above statements is/are not correct?
(a) (i) and (iii)
(b) (iii) and (iv)
(c) (iii) only
(d) (iv) only

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Problem 15

Given graph represents the absorption spectra of three photosynthetic pigments, chl $a$, chl $b$ and $\beta$-carotene.
Select the correct statement regarding this.
(a) The curve showing the amount of absorption of pigment is called as absorption spectrum.
(b) Chl $a$ and chl $b$ absorb maximum light in blue and red wavelengths of light.
(c) Rate of photosynthesis is maximum in blue and red wavelengths of light.
(d) All of these.

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Problem 16

Absorption spectrum of chl a shows maximum absorption in and regions of light.
(a) blue and green
(b) blue and red
(c) red and green
(d) red and far red

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Numerade Educator

Problem 17

Accessory photosynthetic pigments in most green plants are
(a) chlorophyll a
(b) chlorophyll $b$
(c) carotenoids and xanthophylls
(d) both (b) and $(\mathrm{c})$.

Narayan Hari

Numerade Educator

Problem 18

If green plant cells are incubated with $0^{18}$-labelled $\mathrm{CO}_{2}$, which of the following molecules will become radioactive when the cells are exposed to light?
(a) ATP
(b) Water
(c) Sugar
(d) $\mathrm{O}_{2}$

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Numerade Educator

Problem 19

If green plant cells are incubated with $0^{18}$ - labelled water, which of the following molecules will become radioactive when the cells are exposed to light?
(a) $\mathrm{O}_{2}$
(b) $\mathrm{CO}_{2}$
(c) $\mathrm{H}_{2} \mathrm{O}$
(d) Sugar

Narayan Hari

Numerade Educator

Problem 20

Red colour of tomatoes, carrots and chillies is due to the presence of a type of carotene pigment called as
(a) lutein
(b) lycopene
(c) fucoxanthin
(d) phycoerythrin.

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Numerade Educator

Problem 21

Yellowish colour of autumn foliage is due to the presence of a type of xanthophyll pigment called as
(a) lutein
(b) lycopene
(c) fucoxanthin
(d) zeaxanthin.

Narayan Hari

Numerade Educator

Problem 22

Which of these is a type of phycobilin
(a) Phycocyanin
(b) Allophy pigments)
(c) Phycoerythrin (d) All of
(d) All of these Study the following statemen

Parvati Devi

Numerade Educator

Problem 23

Study the following statements. lese
(i) Red light falling in the range of wavelength $6 \mathrm{~g}_{\text {. }}$. is the most effective for photosynthesis.
(ii) Green light falling in the range of $500-580 \mathrm{~nm}$ is the least effective for photive
(iii) Chl a, chl $b$, carotenes and xanthophyliotos, in organic solvents. c?Ip (iv) Phycobilins (phycocyanin, allophycocy?) Which of tho -

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Numerade Educator

Problem 24

inese Chlorophyll a appears appears in colour and chla in colour in the chromatogram
(a) bluish green, yellowish green
(b) yellowish green, bluish green
(c) blue, blue
(d) green, green

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Problem 25

Tilons Which of the following is produced during the liottp of photosynthesis?
(a) ATP
(b) $\mathrm{NADPH}_{2}$
(c) Both ATP and $\mathrm{NADPH}_{2}$
(d) Carbohydrates

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Problem 26

Given figure depicts the light harvesting complex (lf? photosystem I (PS |),
Select the correct identification for $A, B, C$ and $D$.
$\begin{array}{llll}\mathrm{A} & \mathrm{B} & \mathrm{C}\end{array} \mathrm{D}$
(a) Core molecules Antenna $P_{680}$ Primary molecules $\quad \mathrm{e}^{-}$accepist $\begin{array}{llll}\text { (b) Antenna } & \text { Core } & P_{700} & \text { Primary }\end{array}$ molecules molecules e- acceptu
(c) Antenna Core $\quad P_{700}$ Plastocgrt molecules molecules
(d) Core Reaction $P_{680}$ Plastogart molecules centre

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Problem 27

C B
A $\mathrm{H}^{+}$acceptor e-acceptor $\quad \mathrm{P}_{680} \quad$ NADP+ $P_{100}$
e- acceptor e- transport Photo- NADPH
(a) photo- e-acceptol system system II
Photo-
(d) spstem ll e-acceptor e-transport Photo- NADPH
(d) Photo" system system I sistem I

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Problem 28

is the process of synthesis of ATP from $\mathrm{ADP}$ and piin the presence of light.
(a) Phosphorylation
(d) Photosystem
(d) Oxidative phosphorylation

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Numerade Educator

Problem 29

What does the given diagram represent with respect to the various photosynthetic processes?
(a) $C_{2}$ gyle
(b) Cyclic photophosphorylation
(d) Non-cyclic photophosphorylation
(d) $Z$-scheme of phosphorylation

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Numerade Educator

Problem 30

Photochemical phase does not include
(a) light absorption
(b) water splitting and $\mathrm{O}_{2}$ release
(d) AIP and NADPH formation
(d) CO fixation.

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Numerade Educator

Problem 31

Reaction centre of PS I is and reaction centre of $P s \|$ is
(a) $P_{(20,} P_{700}$
(b) $P_{700}, P_{680}$
(d) $P_{B O O} P_{E 00}$
(d) $\mathrm{P}_{700}, \mathrm{P}_{900}$

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Numerade Educator

Problem 32

In PS $I$, the reaction centre Chl a has absorption maxima at whereas in PS II, the reaction centre Chl a has absorption maxima at
(a) $700 \mathrm{~nm}, 680 \mathrm{~nm}$
(b) $680 \mathrm{~nm}, 700 \mathrm{~nm}$
(c) $400 \mathrm{~nm}, 500 \mathrm{~nm}$
(d) $700 \mathrm{~nm}, 800 \mathrm{~nm}$

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Numerade Educator

Problem 33

The biochemical objective of $\mathrm{PS} \mid$ is to
(a) oxidise NADPH
(b) hydrolyse ATP
(c) phosphorylate ADP
(d) reduce NADP+.

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Numerade Educator

Problem 34

Which one is involved in Z-scheme of photosynthesis?
(a) PSI
(b) PS II
(c) e-carriers
(d) All of these

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Numerade Educator

Problem 35

Which of the following is/are formed during Z-scheme of photophosphorylation?
(a) ATP
(b) $\mathrm{NADPH}_{2}$
(c) $\mathrm{O}_{2}$
(d) All of these

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Numerade Educator

Problem 36

For $\mathrm{NADPH}+\mathrm{H}^{+}$formation
(a) only PS 1 is required
(b) only PS $\|$ is required
(c) both PS I and PS II are required
(d) only stroma is required.

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Numerade Educator

Problem 37

Read the following statements and select the correct ones.
(i) PS $I$ is involved in non-cyclic photophosphorylation only.
(ii) PS II is involved in both cyclic and non-cyclic photophosphorylation.
(iii) Stroma lamellae membranes possess PS I only, whereas grana lamellae membranes possess both PS I and PS II.
(a) (i) only
(b) (ii) only
(c) (iii) only
(d) (i), (ii) and (iii)

Parvati Devi

Numerade Educator

Problem 38

PS $\|$ is located on
(a) inner side of thylakoid membrane
(b) outer side of thylakoid membrane
(c) lumen of thylakoid membrane
(d) stroma lamellae.

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Numerade Educator

Problem 39

Study the given flow chart of cyclic photophosphorylation and select the correct answer for $A, B$ and $C$.
(a) PSI $e^{-}$acceptor $\quad P_{680}$
(b) PSI $e^{-}$acceptor
(c) PSII Cytochrome $p$ ?od
(d) PS II Cytochrome 700

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Numerade Educator

Problem 40

680
Refer the given reaction.
$$
2 \mathrm{H}_{2} \mathrm{O} \rightarrow 4 \mathrm{H}^{+}+\mathrm{O}_{2}+4 \mathrm{e}^{-}
$$
Where does this reaction take place in the chloroplasts of plants?
(a) Outer surface of thylakoid membrane
(b) Inner surface of thylakoid membrane
(c) In the matrix (stroma)
(d) Intermembrane space

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Numerade Educator

Problem 41

Which one of the following ions is essential for photolysis of water?
(a) Manganese
(b) Zinc
(c) Copper
(d) Boron

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Numerade Educator

Problem 42

In cyclic photophosphorylation, the electron released by reaction centre $\left(P_{700}\right)$ is ult?mately accepted by
(a) ferredoxin
(b) $\mathrm{NADP}^{+}$
(c) reaction centre $\left(P_{700}\right)$
(d) plastocyanin.

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Numerade Educator

Problem 43

During non-cyclic photophosphorylation, electrons are continuously lost from the reaction centre of PS II. Which source is used to replace these electrons?
(a) Sunlight
(b) $\mathrm{O}_{2}$
(c) $\mathrm{H}_{2} \mathrm{O}$
(d) $\mathrm{CO}_{2}$

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Numerade Educator

Problem 44

During $Z$ scheme electrons excited by absorption of light in PS $I$ are transferred to the primary acceptors, and therefore must be replaced. The replacements come directly from
(a) NADP
(b) ATP
(c) PSII
(d) water.

Parvati Devi

Numerade Educator

Problem 45

The $Z$ sheme of photophosphorylation follows the following sequence:

Which of the following options is correct for $A, B, C, D$ transfer of electrons? $\mathbf{A} \quad \mathbf{B}$
- if $C \quad D$
(a) Uphill Downhill Prin Downhill IInhill "Oe Uphill
Downhill
Uphill
Downhill
(b) Downhill $\begin{array}{llll}\text { (c) Downhill } \\ \text { (d) Uphill } & \text { Uphill } & \text { Uphill } & \text { Downhill } & \text { Uphill } & \text { Uphill } \\ \text { Downhill } & \text { Downhill } & \text { Uphill }\end{array}$ 011 Uphill
Uphill
Downhill Breakedon

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Problem 46

Breakdown of proton gradient developedduringchemiosmosis leads to the release of
(a) oxygen
(b) water
(c) energy
(d) protons.

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Numerade Educator

Problem 47

Read the given statements and select the correct ons, Statement $1:$ In photosynthesis, during ATp protons accumulate in the lumen of thylakoid. Statement $2:$ In respiration, during ATP accumulate in the intermembranal space of ther
(a) Both statements 1 and 2 are correct mitoch is the correct explanation of statement $1 .$
(b) Both statements 1 and 2 are correct but not the correct explanation of statement
(c) Statement 1 is correct and statement 2 is
(d) Both statements 1 and 2 are incorrect. 1 nco Assuming a thylakoid is somehnu

Parvati Devi

Numerade Educator

Problem 48

iect. Assuming a thylakoid is somehow punctured interior of the thylakoid is no longer separated thy stroma. This damage will have the most dired fion which of the following processes?
(a) Splitting of water.
(b) Absorption of light energy by chlorophyll,
(c) Flow of electrons from photosystem $\|$ to
(d) Synthesis of ATP. Identify the parts mat

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Numerade Educator

Problem 49

Identify the parts marked as $A$, B and C in the showing ATP synthesis through chemiosmosis. given tot 1
(a) Thylakoid lumen $\mathrm{F}_{0} \quad \mathrm{~F}_{1}$
(b) Thylakoid lumen $\mathrm{F}_{1} \mathrm{~F}_{0}$
(c) Chloroplast lumen $\mathrm{F}_{0} \quad \mathrm{~F}_{1}$
(d) Chloroplast lumen $\mathrm{F}_{1} \mathrm{~F}_{0}$

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Numerade Educator

Problem 50

Which of the following statements about dark reactios! correct?
(a) They occur in darkness.
(b) They are not light dependent.
(c) They are dependent upon the products synthese. during light reactions.
(d) All of these.

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Numerade Educator

Problem 51

$\begin{array}{ll}\mathrm{DCMU} & \text { (b) } \mathrm{CO}_{2} \text { fixation }\end{array}$
(d) $\mathrm{NO}_{3}^{2-}$ uptake.
$d^{j 0}$

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Numerade Educator

Problem 52

that correctly identifies $X, Y$ and $Z$. it the option that $\mathrm{Y}$ $X$ Grana Chloroplast DNA
(2) Sroma (b) stroma Grana Starch granule ( $\begin{aligned}&\text { Grona } \\&\text { Stroma } & \text { Chloroplast DNA }\end{aligned}$ |
(d) Grina lonirtr thof

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Numerade Educator

Problem 53

the option which correctly depicts the functions of igiett $\begin{array}{lll}\rho\left[5 X_{1}\right. & Y & Y\end{array}$
$X$
(1) Dark reaction Light reaction Cytoplasmic inheritance
(b) Light reaction Carbohydrate Carbohydrate synthesis storage
|d Light reaction Carbohydrate Carbohydrate storage synthesis
1d) Carbohydrate Carbohydrate Cytoplasmic spothesis storage inheritance

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Problem 54

following table summarizes the differences between light reations and dark reactions.
Which of the above pairs of differences is/are incorrect ?
(a) (i) and (iv)
(b) (iii) and (iv)
(d) (iv) only
(d) (i) only

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Numerade Educator

Problem 55

In $\mathrm{C}_{4}$ plants, Calvin cycle enzymes are present in
(a) chloroplasts of mesophyll cells
(b) chloroplasts of bundle sheath cells
(c) cytoplasm of guard cells
(d) cytoplasm of epidermal cells.

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Numerade Educator

Problem 56

Read the given statements and select the correct option. Statement 1 : Carboxylation is the most crucial step of Calvin cycle where $\mathrm{CO}_{2}$ is utilized for the carboxylation of RuBP.

Statement 2 : This reaction is catalysed by the enzyme RuBisCO which results in the formation of two molecules of 3 -PGA.
(a) Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement $1 .$
(b) Both statements 1 and 2 are correct but statement 2 is not the correct explanation of statement $1 .$
(c) Statement 1 is correct and statement 2 is incorrect.
(d) Both statements 1 and 2 are incorrect.

Parvati Devi

Numerade Educator

Problem 57

Select the correct statement regarding the first stable product formed in Hatch and Slack pathway in $C_{4}$ plants.
(a) Oxaloacetate is formed by carboxylation of phosphoenol pyruvate (PEP) in the bundle sheath cells,
(b) Oxaloacetate is formed by carboxylation of phosphoenol pyruvate (PEP) in the mesophyll cells.
(c) Phosphoglyceric acid is formed in the mesophyll cells.
(d) Phosphoglyceric acid is formed in the bundle sheath cells.

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Numerade Educator

Problem 58

Match Column-I with Column-II and select the correct option from the codes given below. Column-I Column-II
A. $C_{4}$ plants
(i) Succulents
B. Chlorophyll $b$
(ii) Accessory photosynthetic
C. PS II pigment
(iii) Photo-oxidation of $\mathrm{H}_{2} \mathrm{O}$
D. CAM
(iv) Kranz anatomy
(a) $\mathrm{A}$-(iv), B-(ii), $\mathrm{C}-($ iii), $\mathrm{D}$-(i)
(b) $\mathrm{A}$-(iii), B-(ii), C-(iv), D-(i)
(c) $\mathrm{A}$-(i), B-(iii), C-(ii), D-(iv)
(d) $A$-(i), B-(ii), C-(iii), D-(iv)

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Numerade Educator

Problem 59

Select the incorrect pair.
(a) 2-carbon compound - Aspartic acid
(b) 3 -carbon compound - PGA
(c) 4-carbon compound - Malic acid
(d) 5 -carbon compound - RuBP

Narayan Hari

Numerade Educator

Problem 60

Identify the correct sequence of stages of Calvin cycle.
(a) Reduction $\rightarrow$ Carboxylation $\rightarrow$ Regeneration
(b) Carboxylation $\rightarrow$ Regeneration $\rightarrow$ Reduction
(c) Carboxylation $\rightarrow$ Reduction $\rightarrow$ Regeneration
(d) Reduction $\rightarrow$ Regeneration $\rightarrow$ Carboxylation

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Numerade Educator

Problem 61

$\mathrm{CO}_{2}$ combines with RuBP in the presence of enzyme RuBisCO to form $3-P G A$. This process of Calvin cycle is included under
(a) carboxylation
(b) oxygenation
(c) reduction
(d) regeneration.

Narayan Hari

Numerade Educator

Problem 62

Read the given statements and select the correct option. Statement 1 : Crassulacean acid metabolism occurs in succulent plants which grow in xeric conditions. Statement $2:$ Stomata are generally sunken in succulent plants.
(a) Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1 .
(b) Both statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1 .
(c) Statement 1 is correct and statement 2 is incorrect.
(d) Both statements 1 and 2 are incorrect.

Parvati Devi

Numerade Educator

Problem 63

Glucose synthesis occurs during which stage of $C_{3}$ cycle?
(a) Carboxylation
(b) Oxygenation
(c) Reduction
(d) Regeneration

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Numerade Educator

Problem 64

Kranz anatomy is not exhibited by which of the following plants?
(a) Maize
(b) Sorghum
(c) Sugarcane
(d) Sunflower

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Numerade Educator

Problem 65

Given figure represents $\mathrm{C}_{4}$ pathway. Select the suitable options for $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$.
A 8
(a) Decarboxylation Reduction Regeneration 7
(b) Fixation Transamination Regeneration
(c) Carboxylation Decarboxylation Reduction
(d) Fixation Decarboxylation Regeneration

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Numerade Educator

Problem 66

During fixation of one molecule of $\mathrm{CO}_{2}$ by $\mathrm{C}_{3}$ plants, number of ATP and $\mathrm{NADPH}_{2}$ required are
(a) 3 ATP and $2 \mathrm{NADPH}_{2}$
(b) 5 ATP and 2 NADPH $_{2}$
(c) 12 ATP and $12 \mathrm{NADPH}_{2}$
(d) $2 \mathrm{ATP}$ and $3 \mathrm{NADPH}_{2}$.

Parvati Devi

Numerade Educator

Problem 67

Which of the following statements is incorreca the Calvin cycle of $C_{3}$ plants ?
(a) First stable product of Calvin cycle in 3-Phosphoglyceric acid.
(b) Sunflower is an example of $C_{3}$ plants
(c) Calvin cycle occurs in bundle sheath
(d) Enzyme PEPcase is absent in $C_{3}$ plants of $C_{3}$ Hatch and Slack nathuraw

Parvati Devi

Numerade Educator

Problem 68

During Hatch and Slack pathway, PEP combines the presence of enzyme PEPcase, to form OAA. of initial fixation of $\mathrm{CO}_{2}$ occurs in
(a) mesophyll cells
(b) bundle sheath
(c) both (a) and (b) (d) none of these $\mathrm{E}$ (b)

Narayan Hari

Numerade Educator

Problem 69

Consider following statements with respect to pathway and select the correct ones.
(i) Mesophyll cells possesses both RuBisCO and enzymes.
(ii) Initial $\mathrm{CO}_{2}$ fixation occurs in mesophyll $_{\mathrm{cells}}$
(iii) Final $\mathrm{CO}_{2}$ fixation occurs in bundle sheath cels
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (i), (ii) and (iii)

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Numerade Educator

Problem 70

How many ATP and NADPH molecules are respeq required to make one molecule of glucose through, cycle?
(a) 3 and 2
(b) 9 and 6
(c) 18 and 12
(d) 12 and 18

Narayan Hari

Numerade Educator

Problem 71

Select the incorrect statement as far as kranz analon concerned.
(a) Undifferentiated mesophyll occurs in concentric $b_{8}$ around vascular bundles.
(b) Centrifugal chloroplasts are present in bundle sity cells.
(c) Large sized bundle sheath cells are arranged wreath-like manner in one to several layers.
(d) Chloroplasts of bundle sheath cells possess developed grana lamellae.

Parvati Devi

Numerade Educator

Problem 72

How many number of $\mathrm{CO}_{2}$ molecules are required:
synthesize one molecule of glucose during $C_{3}$ cycle?
(a) One
(b) Three
(c) Six
(d) Five

Narayan Hari

Numerade Educator

Problem 73

RuBisCO is
(a) RuBP carboxylase
(b) RuBP oxygenase
(c) RuBP carboxylase-oxygenase
(d) RuBP carboxydismutase.

Narayan Hari

Numerade Educator

Problem 74

The enzyme RuBisCO has
(a) more affinity for $\mathrm{CO}_{2}$, than for $\mathrm{O}_{2}$
(b) more affinity for $\mathrm{O}_{2}$, than for $\mathrm{CO}_{2}$
(c) equal affinity for both
(d) more affinity for sugars, than for $\mathrm{CO}_{2}$.

Narayan Hari

Numerade Educator

Problem 75

reaction. the
$\begin{array}{ll}\text { pible first reaction Of } & \text { (b) } C_{4} \text { pathway }\end{array}$
(2) $C_{3} \mathrm{p}^{2}$ thway for photosynthesis in $C_{3}$

Narayan Hari

Numerade Educator

Problem 76

A hua for photosynthesis in $C_{3}$
(a) $C_{2} p^{a t h}$ conditions
(d) (2) $30^{\circ} \cdot 45^{\circ} \mathrm{C}$ and $10^{\circ} \mathrm{C}-30^{\circ} \mathrm{C}$

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Numerade Educator

Problem 77

(d) $20^{\circ}-30^{\circ} \mathrm{C}$ and 4 ith Column - II and select the correct
(d) column - Codes given
(i) Kalanchoe, Opuntia c $_{3}$ plants
(ii) Maize, sugarcane $\begin{array}{ll}\text { A }_{1} \text {, plants } & \text { (iii) Helianthus }\end{array}$
8. CAM plants
C. B $B$ $A \quad$ (i)
(3) (ii)
(iii)
(iii)
(b) (i)
(ii)
(ii)
(i)
(d) (iii)
(iii)
(ii)

Parvati Devi

Numerade Educator

Problem 78

(d) (1) representation of Calvin cycle, identify $A, B$ the given and ( and select the correct option. tmosphere
Sucrose, starch
(a) JPGA RUBP Triose phosphate
(b) RuBP 3PGA Triose phosphate
(c) PEP OAA Malic acid
(10) PEP RUBP OAA

Narayan Hari

Numerade Educator

Problem 79

Which kind of cells are represented by letters $\mathrm{P}$ and $Q$ in the given figure showing $C_{4}$ pathway?
(a) Palisade parenchyma Spongy parenchyma
(b) Spongy parenchyma Palisade parenchyma
(c) Mesophyll cells Bundle sheath cells
(d) Bundle sheath cells Mesophyll cells

Parvati Devi

Numerade Educator

Problem 80

In an experiment in which photosynthesis is performed during the day, you provide a plant with radioactive carbon dioxide ${ }^{14} \mathrm{CO}_{2}$ ) as a metabolic tracer. The ${ }^{14} \mathrm{C}$ is incorporated first into oxaloacetic acid. The plant is best characterized as a
(a) $\mathrm{C}_{4}$ plant
(b) $C_{3}$ plant
(c) CAM plant
(d) insectivorous plant.

Parvati Devi

Numerade Educator

Problem 81

Read the given statements and select the correct option. Statement 1: Photorespiration interferes with the successful functioning of Calvin cycle. Statement 2 : Photorespiration oxidises ribulose- 1,5 biphosphate which is an acceptor of $\mathrm{CO}_{2}$ in Calvin cycle.
(a) Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1 .
(b) Both statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1 .
(c) Statement 1 is correct and statement 2 is incorrect.
(d) Both statements 1 and 2 are incorrect.

Parvati Devi

Numerade Educator

Problem 82

How many ATP and NADPH, are respectively produced in the process of photorespiration?
(a) 2 and 4
(b) 1 and 2
(c) 4 and 6
(d) 0 and 0

Narayan Hari

Numerade Educator

Problem 83

Which organelle out of these does not participate in photorespiration?
(a) Peroxisomes
(c) Chloroplasts
(d) Golgi bodies

Narayan Hari

Numerade Educator

Problem 84

During $\mathrm{C}_{2}$ cycle, there occurs
(a) synthesis of sugars
(b) utilization of ATP.
(c) synthesis of ATP
(d) synthesis of NADPH.

Narayan Hari

Numerade Educator

Problem 85

Study the given graph showing the effect of light intensity on the rate of photosynthesis. Which of the following statements regarding this is correct?
(a) Light is a limiting factor in the region A.
(b) Region $C$ represents that rate of photosynthesis is not increased further by increasing light intensity because some other factor became limiting.
(c) Point $D$ represents the intensity of light at which some other factor became limiting.
(d) All of these.

Parvati Devi

Numerade Educator

Problem 86

The 'law of limiting factors' was given by year
(a) Blackman, 1905
(b) Blackman, 1804
(c) Engelmann, 1909
(d) Warburg, 1920

Narayan Hari

Numerade Educator

Problem 87

Given table shows the $\mathrm{CO}_{2}$ compensation point and optimum $\mathrm{CO}_{2}$ concentration for photosynthesis for $C_{3}$ and $\mathrm{C}_{4}$ plants.
$$
\begin{array}{ll}
\text { (a) } 0-50 \mathrm{ppm} & 300 \mathrm{ppm} \\
\text { (b) } 0-10 \mathrm{ppm} & 450 \mathrm{ppm} \\
\text { (c) } & 100-150 \mathrm{ppm} & 250 \mathrm{ppm} \\
\text { (d) } & 100-110 \mathrm{ppm} & 290 \mathrm{ppm}
\end{array}
$$

Parvati Devi

Numerade Educator

Problem 88

When temperature is increased from minimum| rate of photosynthesis doubles for every to temperature.
(a) $1^{\circ} \mathrm{C}$
(b) $10^{\circ} \mathrm{C}$
(c) $20^{\circ} \mathrm{C}$
(d) $30^{\circ} \mathrm{C}$

Parvati Devi

Numerade Educator

Problem 89

Iropical plants have a the plants adapted to temperate climates. Optim
(a) lower
(b) equal
(c) higher
(d) none of these

Parvati Devi

Numerade Educator

Problem 90

Quality of light refers to
(a) intensity of light
(b) frequency of light
(c) wavelength of light
(d) duration of light.

Parvati Devi

Numerade Educator

Problem 91

A point at which illuminated plant parts stop $\mathrm{CO}_{2}$ from their environment, is known as stop absot.
(a) $\mathrm{CO}_{2}$ compensation point
(b) $\mathrm{CO}_{2}$ saturation point
(c) $\mathrm{CO}_{2}$ optimum point
(d) $\mathrm{CO}_{2}$ limiting point.

Parvati Devi

Numerade Educator

Problem 92

Which of the following is not an external factor infiver photosythesis?
(a) $\mathrm{CO}_{2}$ concentration
(b) $\mathrm{O}_{2}$ concentration
(c) Availability of water
(d) Chlorophyll concent

Parvati Devi

Numerade Educator

Problem 93

Warburg effect refers to 1
(a) decreased photosynthetic rate at very high concentration
(b) increased photosynthetic rate at very high? concentration
(c) decreased photosynthetic rate at very lon concentration
(d) increased photosynthetic rate at very low! concentration.

Parvati Devi

Numerade Educator

Problem 94

The factor which is not limiting in normal conditiont photosynthesis is
(a) water
(b) chlorophyll
(c) light
(d) carbon dioxide.

Parvati Devi

Numerade Educator