Photosynthesis in Higher Plants TS

Question 1 of 50

1. Question

1 point(s)

The hypothesis “Plants restore to the air whatever breathing animals and burning candles remove” was given, after his experiments, by:

Joseph Priestley
Jan Ingenhousz
Julius von Sachs
C.B. Van Neil

Question 2 of 50

2. Question

1 point(s)

Who first showed that it is only the green parts of the plants that could release oxygen during photosynthesis?

Joseph Priestley
Jan Ingenhousz
Julius von Sachs
C. B. Van Neil

Question 3 of 50

3. Question

1 point(s)

The diagram shows the famous Engelmann experiment that helped us understand important aspects of the process of photosynthesis. What conclusion can be drawn by the pattern of accumulation of aerobic bacteria shown in the diagram?

Excess carbon dioxide is released by the alga in the area of accumulation.
Only red and violet lights are effective for photosynthesis.
In the areas of accumulation, most oxygen was liberated by the alga.
Bacteria are attracted to red and blue light.

Question 4 of 50

4. Question

1 point(s)

Refer section 11.3, NCERT – in-text question. When do you think the chloroplasts will be aligned with their flat surfaces parallel to the walls of the mesophyll cells?

In dark
When light intensity is low
When light intensity is high
They are always aligned parallel to the walls

Question 5 of 50

5. Question

1 point(s)

Section $
11.1
$ NCERT asks you to explain the conclusions that can be drawn from the Moll’s half leaf experiment. Let me refresh your memory of Class X by the following diagram:

What can be said after observing the results of the experiment?
I. Negative starch test by the leaf portion present inside the bottle indicates $
\mathrm{CO}_2
$ is necessary for this process.
II. Negative test of starch, which is also shown by the portion of the leaf present in between the split of the split cork is due to the lack of $
\mathrm{CO}_2
$ and light, thus indicating that both of them are essential requirements.

ONLY I
ONLY II
BOTH
NONE

Question 6 of 50

6. Question

1 point(s)

After reading Section $
11.4
$ , NCERT, it can be correctly said about the relation between the absorption spectra of various pigments and the action spectrum of photosynthesis that:
1. There is a complete one to one overlap between the absorption spectrum of chlorophyll a and the action spectrum of photosynthesis.
2. There is a complete one to one overlap between the absorption spectrum of chlorophyll b and the action spectrum of photosynthesis.
3. The absorption spectrum of chlorophyll a is wider than the action spectrum of photosynthesis.
4. The absorption spectrum of chlorophyll a is narrower than the action spectrum of photosynthesis.

1
2
3
4

Question 7 of 50

7. Question

1 point(s)

The ‘light reaction’ of photosynthesis in higher plants does not include:

Light absorption
Water splitting and oxygen release
Formation of ATP and NADPH
Fixation of carbon

Question 8 of 50

8. Question

1 point(s)

What is true regarding PS I and PS II?

PS I works before PS II during the light reaction
A single chlorophyll a molecule makes the reaction center in both PS I and PS II
The reaction center of PS I is P680 and in PS II is P700
LHC is seen in PS I but not in PS II

Question 9 of 50

9. Question

1 point(s)

The electrons needed to replace those removed from PS I are provided by:

The LHC
Water
NADPH
PS II

Question 10 of 50

10. Question

1 point(s)

The stroma lamellae membranes:

have both PS II and NADP reductase enzyme
have PS II but not NADP reductase enzyme
lack PS II but have NADP reductase enzyme
lack both PS II and NADP reductase enzyme

Question 11 of 50

11. Question

1 point(s)

Oxygen, during oxygenic photosynthesis, is produced during:

cyclic photophosphorylation
the light-dependent reactions involving photosystems I and II
Calvin cycle
The Krebs cycle

Question 12 of 50

12. Question

1 point(s)

In oxygenic photosynthesis, the release of oxygen is a byproduct of:

chemiosmosis
reducing $
N A D P^{+}
$ by FNR
splitting the water molecules
cyclic photophosphorylation

Question 13 of 50

13. Question

1 point(s)

The reactions of the Calvin cycle can take place as long as which of the following products of the light dependent reactions are available?

Water and Glucose
Water and ATP
Oxygen and Carbon dioxide
ATP and NADPH

Question 14 of 50

14. Question

1 point(s)

The primary function of the Calvin cycle is to:

Use ATP to release carbon dioxide
Use NADPH to release carbon dioxide
Split water and release oxygen
Fix inorganic carbon to simple sugars

Question 15 of 50

15. Question

1 point(s)

For the synthesis of glucose, the source of hydrogen atoms is:

Water
NADPH
$ \mathrm{FADH}_2 $
Monosaccharides

Question 16 of 50

16. Question

1 point(s)

In chloroplasts, protons are actively pumped from

the intermembrane space to the matrix
the matrix to the stroma.
the stroma to the thylakoid space
the thylakoid space to the intermembrane space.

Question 17 of 50

17. Question

1 point(s)

What would be true for the sequence of events shown in the given diagram:

I. The whole scheme of transfer of electrons, starting from the PS II, uphill to the acceptor, down the electron transport chain to PS I, excitation of electrons, transfer to another acceptor, and finally down-hill to $
N A D P^{+}
$ reducing it to $
\mathrm{NADPH}+\mathrm{H}^{+}
$ is called the Z scheme.
II. The electrons that are moved from photosystem II get replaced by electrons available due to splitting of water

ONLY I
ONLY II
BOTH
Neither I nor II

Question 18 of 50

18. Question

1 point(s)

Probably the strongest biological oxidizing agent is P680+ because:

It accepts electron in both photosystems.
It transfers electrons to plastoquinone.
It strongly attracts electrons formed by the splitting of water.
It transfers electrons to plastocyanin.

Question 19 of 50

19. Question

1 point(s)

Again an intext question in NCERT, Section 11.7.2. How many ATP and NADPH are respectively required to make one molecule of glucose through the Calvin pathway?

3 and 2
6 and 6
9 and 6
18 and 12

Question 20 of 50

20. Question

1 point(s)

The correct chronological stages of the Calvin cycle will be:

Carboxylation $
\Rightarrow $ Reduction $
\Rightarrow $ Regeneration
Carboxylation $ \Rightarrow $ Regeneration$ \Rightarrow $Reduction
Regeneration $ \Rightarrow $ Reduction $ \Rightarrow $ Carboxylation
Reduction $ \Rightarrow $ Regeneration $ \Rightarrow $ Carboxylation

Question 21 of 50

21. Question

1 point(s)

$
\mathrm{C}_3 $ plant was provided carbon dioxide labelly with a radioactive isotope. The amount of radioactivity was measured in chloroplasts. In which of the following molecules do you expect the radioactivity to appear first as the process of photosynthesis proceeds in this plant?

OAA
PEP
PGA
RuBP

Question 22 of 50

22. Question

1 point(s)

RuBP is:

2 carbon ketose sugar
2 carbon aldose sugar
5 carbon ketose sugar
5 carbon aldose sugar

Question 23 of 50

23. Question

1 point(s)

The bundle sheath cells are characterized by:
I. A large number of chloroplasts present in them
II. Thick cell walls impervious to gas exchange
III. Large intercellular spaces

Only I and II
Only I and III
Only II and III
I , II and III

Question 24 of 50

24. Question

1 point(s)

The primary$
\mathrm{CO}_2 $ acceptor in $
\mathrm{C}_4 $ plants is

RUBP in mesophyll cells
RuBP in bundle sheath cells
PEP in mesophyll cells
PEP in bundle sheath cells

Question 25 of 50

25. Question

1 point(s)

In $
\mathrm{C}_4 $ pathway, the 4-carbon compound transported to bundle sheath cells most commonly is:

Glutamic acid
Malic Acid
Oxaloacetic Acid
Fumaric Acid

Question 26 of 50

26. Question

1 point(s)

Which of the following is not a $
\mathrm{C}_4 $plant?

Maize
Sorghum
Sugarcane
Wheat

Question 27 of 50

27. Question

1 point(s)

The 2-carbon compound formed in photorespiration is:

Acetyl CoA
Phosphoglycolate
Acetic acid
Ethanol

Question 28 of 50

28. Question

1 point(s)

The factors that can be limiting for the light independent reactions of photosynthesis are:

$
\mathrm{CO}_2 $, temperature, and light
$ \mathrm{CO}_2 $, light, and water
water, temperature, and $ \mathrm{CO}_2 $
oxygen, water, and temperature

Question 29 of 50

29. Question

1 point(s)

Blackman measured the effects of various factors different light intensities, carbon dioxide concentrations and temperature on photosynthesis. He found that at high light intensities, an increase in temperature [up to $
35^{\circ} \mathrm{C} $] or carbon dioxide accelerates photosynthesis. What can be concluded?
A: Photosynthesis includes both light-dependent and light-independent reactions.
B: Enzymes must carry out the light-independent reactions.

Only A
Only B
Both A and B
Neither A nor B

Question 30 of 50

30. Question

1 point(s)

Consider the given two statements:
Statement I: Green house crops such as tomatoes and ben pepper are allowed to grow in carbon dioxide enriched atmosphere that leads to higher yields.
Statement II: $
\mathrm{C}_3 $ plants respond to higher carbon dioxide concentration by showing increased rates photosynthesis, leading to higher productivity.

Both Statement I and Statement II are correct and Statement II explains Statement I
Both Statement I and Statement II are correct but Statement II does not explain Statement I
Statement I is correct but Statement II is incorrect
Statement I is incorrect but Statement II is correct

Question 31 of 50

31. Question

1 point(s)

What percentage in atmosphere of carbon dioxide can become damaging to plants over long periods?

0.03 to 0.04
0.04 to 0.05
0.05
more than 0.05

Question 32 of 50

32. Question

1 point(s)

Water affects the process of photosynthesis in higher plants because:
I. Water stress can cause the stomata to close, hence, reducing the carbon dioxide availability.
II. Water stress also makes leaves wilt, thus, reducing the surface area of the leaves and their metabolic activity as well.

Only I
Only II
Both I and II
Neither I nor II

Question 33 of 50

33. Question

1 point(s)

Consider the given two statements:
Statement I: Except for plants in shade or in dense forests, light is rarely a limiting factor in nature.
Statement II: There is a linear relationship between incident light and carbon dioxide fixation rates at low light intensities.

Both Statement I and Statement II are correct and Statement II explains Statement I
Both Statement I and Statement II are correct but Statement II does not explain Statement I
Statement I is correct but Statement II is incorrect
Statement I is incorrect but Statement II is correct

Question 34 of 50

34. Question

1 point(s)

The pathway shown in the figure will be seen in:-

$
\mathrm{C}_4 $ plants
$ \mathrm{C}_3 $ plants
CAM
All photosynthetic plants

Question 35 of 50

35. Question

1 point(s)

What would be true for the events shown in the given diagram?

I. A possible location where this could be happening is in the stroma lamellae.
II. While the membrane or lamellae of the grana have both PS I and PS II the stroma lamellae membranes lack PS II as well as NADP reductase enzyme.

ONLY I
ONLY II
BOTH I AND II
NEITHER I NOR II

Question 36 of 50

36. Question

1 point(s)

The oxygenation activity of RuBisCo enzyme in photorespiration leads to the formation of:

1 molecule of the 3-C compound
1 molecule of the 6-C compound
1 molecule of a 4-C compound and 1 molecule of the 2-C compound
2 molecules of the 3-C compound

Question 37 of 50

37. Question

1 point(s)

Photosynthesis in $
\mathrm{C}_4 $ plants is relatively less limited by atmospheric $\mathrm{CO}_2$ levels because:-

The primary fixation of $
\mathrm{CO}_2 $ is mediated via PEP carboxylase.
Effective pumping of $ \mathrm{CO}_2 $ into bundle sheath cells.
Four carbon acids are the primary initial $ \mathrm{CO}_2 $ fixation products
RuBisCO in $ \mathrm{C}_4 $ plants has higher affinity for $ \mathrm{CO}_2 $.

Question 38 of 50

38. Question

1 point(s)

Which of the following statements is incorrect?

RuBisCO is a bifunctional enzyme
In $ \mathrm{C}_4 $ plants, the site of RuBisCO activity is mesophyll cell
The substrate molecule for RuBisCO activity is a 5 carbon compound
RuBisCO action requires ATP and NADPH

Question 39 of 50

39. Question

1 point(s)

Phosphoenol pyruvate (PEP) is the primary $
\mathrm{CO}_2 $ acceptor in:

$
\begin{array}{|l|l|}
\hline \text { 1. } C_4 \text { plants } & \text { 2. } C_2 \text { plants } \\
\hline \text { 3. } C_3 \text { and } C_4 \text { plants } & \text { 4. } C_3 \text { plants } \\
\hline
\end{array}
$

1
2
3
4

Question 40 of 50

40. Question

1 point(s)

Identify the incorrect comparison between $
\begin{array}{|l|l|l|l|}
\hline & \text { Characteristic } & \mathrm{C}_3 \text { plants } & \mathrm{C}_4 \text { plants } \\
\hline \text { 1. } & \text { Chloroplasts } & \begin{array}{l}
\text { One type [only } \\
\text { granal] }
\end{array} & \begin{array}{l}
\text { Two types [granal } \\
\text { and agranal] }
\end{array} \\
\hline \text { 2. } & \text { Photorespiration } & \text { High } & \text { Negligible } \\
\hline \text { 3. } & \begin{array}{l}
\text { First } \mathrm{CO}_2 \\
\text { fixation product }
\end{array} & \text { 3-PGA } & \text { OAA } \\
\hline \text { 4. } & \begin{array}{l}
\text { Carboxylase } \\
\text { enzyme }
\end{array} & \begin{array}{l}
\text { Only } \\
\text { RuBisCO }
\end{array} & \text { Only PEPcase } \\
\hline
\end{array}
$

1
2
3
4

Question 41 of 50

41. Question

1 point(s)

Match the scientists given in Column I with their contribution in understanding the process of photosynthesis in Column II and select the correct answer from the codes given below:

$
\begin{array}{|l|l|l|l|}
\hline & \begin{array}{l}
\text { COLUMN I} \\
\end{array} & & \text { COLUMN II } \\
\hline \text { (A) } & \begin{array}{l}
\text { Jan } \\
\text { Ingenhousz }
\end{array} & \text { (a) } & \begin{array}{l}
\text { Only green parts of the plant are } \\
\text { capable of photosynthesis }
\end{array} \\
\hline \text { (B) } & \begin{array}{l}
\text { F. F. } \\
\text { Blackman }
\end{array} & \text { (b) } & \begin{array}{l}
\text { Enzymes must carry out light } \\
\text { independent reaction }
\end{array} \\
\hline \text { (C) } & \begin{array}{l}
\text { C. B. van } \\
\text { Neil }
\end{array} & \text { (c) } & \begin{array}{l}
\text { Oxygen comes from water and not } \\
\text { from carbon dioxide }
\end{array} \\
\hline \text { (D) } & \begin{array}{l}
\text { T. W. } \\
\text { Engelmann }
\end{array} & \text { (d) } & \begin{array}{l}
\text { First action spectrum of } \\
\text { photosynthesis }
\end{array} \\
\hline
\end{array}
$

$
\begin{aligned}
&\begin{array}{|l|l|l|l|l|}
\hline & \text { (A) } & \text { (B) } & \text { (C) } & \text { (D) } \\
\hline 1 . & \text { (a) } & \text { (b) } & \text { (c) } & \text { (d) } \\
\hline 2 . & \text { (b) } & \text { (a) } & \text { (d) } & \text { (c) } \\
\hline 3 . & \text { (a) } & \text { (b) } & \text { (d) } & \text { (c) } \\
\hline 4 . & \text { (b) } & \text { (a) } & \text { (c) } & \text { (d) } \\
\hline
\end{array}\\
&\text { }
\end{aligned}
$

1
2
3
4

Question 42 of 50

42. Question

1 point(s)

In cyclic electron flow:
1. the electron begins in a pigment complex called photosystem I, passes from the primary acceptor to ferredoxin and then to plastoquinone, then to cytochrome b6f, and then to plastocyanin before returning to chlorophyll.
2. the electron begins in a pigment complex called photosystem II, passes from the primary acceptor to ferredoxin and then to plastoquinone, then to cytochrome b6f, and then to plastocyanin before returning to chlorophyll.
3. the electron begins in a pigment complex called photosystem I, passes from the primary acceptor to ferredoxin and then to plastocyanin, then to cytochrome b 6 f , and then to plastoquinone before returning to chlorophyll.
4. the electron begins in a pigment complex called photosystem II, passes from the primary acceptor to ferredoxin and then to plastocyanin, then to cytochrome b6f, and then to plastoquinone before returning to chlorophyll.

1
2
3
4

Question 43 of 50

43. Question

1 point(s)

Neither light dependent reaction nor Calvin cycle in photosynthesis in plants require

ATP
NADPH
Enzymes
Glucose

Question 44 of 50

44. Question

1 point(s)

To establish a proton gradient across the thylakoid membrane, the protons are provided by:

Glucose
Chlorophyll
Membrane proteins
Water

Question 45 of 50

45. Question

1 point(s)

Identify the correct statement:

The pH within the thylakoid is less than that of the stroma.
The pH of the stroma is higher than that of the other two measurements.
The pH of the stroma is higher than that of the thylakoid space but lower than that of the cytosol.
The pH of the thylakoid space is higher than that observed anywhere else in the cell.

Question 46 of 50

46. Question

1 point(s)

Identify the incorrect statement regarding non-cyclic photophosphorylation:

Being a light reaction, non-cyclic photophosphorylation occurs in the thylakoid membrane.
The photosystem II complex replaces its lost electrons from an external source.
It generates both ATP and NADP
When the chloroplast runs low on ATP for the Calvin cycle, the plant may shift from cyclic to non-cyclic electron flow.

Question 47 of 50

47. Question

1 point(s)

Consider the two statements:
I. The $
\mathrm{C}_4 $ photosynthesis pathway uses more energy than the $
\mathrm{C}_3 $ photosynthesis pathway.
II. $
\mathrm{C}_4 $ plants are able to more efficiently fix carbon in drought, high temperatures, and in limitations of nitrogen or $
\mathrm{CO}_2 $

Both I and II are correct and II explains I
Both I and II are correct but II does not explain I
Only I is correct
Both I and II are incorrect

Question 48 of 50

48. Question

1 point(s)

In photosynthesis, the light-independent reactions take place at

Thylakoid Lumen
PS I
PS II
Stromal Matrix

Question 49 of 50

49. Question

1 point(s)

Question 50 of 50

50. Question

1 point(s)

NEET BIOLOGY TEST SERIES

Photosynthesis in Higher Plants TS

Quiz Summary

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Results

Results

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1. Question

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2. Question

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3. Question

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4. Question

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5. Question

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6. Question

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✅ Evaluate the Options:

7. Question

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8. Question

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9. Question

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10. Question

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11. Question

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12. Question

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13. Question

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Incorrect Options:

14. Question

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❌ Incorrect Options:

15. Question

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16. Question

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17. Question

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18. Question

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❌ Evaluation of Other Options:

19. Question

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20. Question

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21. Question

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22. Question

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23. Question

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III. Large intercellular spaces

24. Question

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25. Question

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26. Question

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27. Question

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28. Question

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Explanation:

29. Question

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30. Question

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31. Question

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32. Question

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33. Question

Hint

❌ Why Statement II does not explain Statement I: