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Photosynthesis in Higher Plants Class 11 MCQs Questions with Answers
Solving Photosynthesis in Higher Plants Multiple Choice Questions of Class 11 Biology Chapter 13 MCQ can be really beneficial because you will be familiar with all of the topics. These MCQ Questions on Photosynthesis in Higher Plants Class 11 with answers provide for a quick review of the Chapter, allowing you to have a better understanding of the subject.
I. Select the correct answer from the following questions:
Question 1.
Kranz anatomy is found in or is typical of
(a) C3 plants
(b) C4 plants
(c) C2 plants
(d) Succulents (CAM Plants)
Answer
Answer: (b) C4 plants
Question 2.
A cell that lacks chloroplast does not
(a) Utlize carbohydrates
(b) Evolve carbon dioxide
(c) Require water
(d) Liberate oxygen
Answer
Answer: (d) Liberate oxygen
Question 3.
Energy is transformed from the light reaction step to the dark reaction step by
(a) ATP
(b) RUBP
(c) ADP
(d) Chlorophyll
Answer
Answer: (a) ATP
Question 4.
Translocation of carbohydrates or sugars (photosynthetic products) in flowering plants occurs in the form of
(a) Glucose
(b) Starch
(c) Maltose
(d) Sucrose
Answer
Answer: (d) Sucrose
Question 5.
Photo-respiration is induced by
(a) High oxygen content
(b) High temperature
(c) High light intensity
(d) High CO2 content
Answer
Answer: (a) High oxygen content
Question 6.
AH vegetation is only due to
(a) Oxygen
(b) CO2
(c) Water
(d) Hydrogen
Answer
Answer: (c) Water
Question 7.
Site of dark reaction is
(a) Granum
(b) Unit membrane
(c) Lamella
(d) Stroma
Answer
Answer: (d) Stroma
Question 8.
All vegetation is only due to water was proved experimentally by
(a) Aristotle
(b) Van Helmont
(c) Joseph
(d) Stephen Hales
Answer
Answer: (b) Van Helmont
Question 9.
Vegetation always purifies the air was proved experimentally first by
(a) Liebig
(b) Warburg
(c) Stephen Hales
(d) Joseph Priestly
Answer
Answer: (d) Joseph Priestly
Question 10.
Reduction of NADP+ to NADPH occurs during
(a) PSI
(b) Calvin Cycle
(c) Cyclic photophosphorylation
(d) Non cyclic photophosphorylaction
Answer
Answer: (d) Non cyclic photophosphorylaction
Question 11.
Wastage of energy is associated with
(a) Krebs cycle
(b) Photorespiration
(c) Photosynthesis
(d) Glycolysis
Answer
Answer: (b) Photorespiration
Question 12.
Green plants convert solar energy into chemical energy of organic matter was proved by
(a) Joseph Priestly
(b) Van Mayer
(c) Semebier
(d) Lavoisier
Answer
Answer: (b) Van Mayer
Question 13.
When the rate of translocation is slow, the rate of photosyntheis shall
(a) Increase
(b) Decrease
(c) Remain Unaffected
(d) Become Zero
Answer
Answer: (b) Decrease
Question 14.
The first visible product of photosynthesis is
(a) Starch
(b) Glycogen
(c) Sugar
(d) Fatty acids
Answer
Answer: (b) Starch
Question 15.
The enzyme ribulose biphosphate carboxylase oxygenase is located in
(a) Mitochondria
(b) Chloroplasts
(c) Golgi bodies
(d) peroxisomes
Answer
Answer: (b) Chloroplasts
Question 16.
C4 plants are
(a) Dicots
(b) Monocots
(c) Both dicots and monocots
(d) Cereals
Answer
Answer: (c) Both dicots and monocots
Question 17.
Photosynthesis has two reaction complexes, one followed by the other. The second seaction complex
(a) Traps light energy
(b) Fixes carbon dioxide
(c) Synthesizes starch
(d) Evolves oxygen
Answer
Answer: (b) Fixes carbon dioxide
Question 18.
Calvin cycle of C4 plants operates in
(a) Stroma of bundle sheath chloroplasts
(b) The statement is wrong
(c) Grana of mesophyll chloroplasts
(d) Stroma of bundle sheath chloroplasts
Answer
Answer: (a) Stroma of bundle sheath chloroplasts
Question 19.
Flashing light experiment and existence of light and dark reactions were demonstrated first by
(a) Van iteil
(b) Emerson and Arnold
(c) Blackmann
(d) Warburg
Answer
Answer: (b) Emerson and Arnold
Question 20.
Mass flow hypothesis was given by
(a) Munch
(b) Dixon
(c) Devries
(d) Curtis
Answer
Answer: (a) Munch
Question 21.
Rate of photosynthesis is independent of
(a) CO2
(b) Quality of light
(c) Light duration
(d) Light intensity
Answer
Answer: (d) Light intensity
Question 22.
Carbon dioxide acceptor in C3 plants is
(a) RUBP
(b) PGA
(c) RMP
(d) PEP
Answer
Answer: (a) RUBP
Question 23.
Photosynthetic process is completed in
(a) mitochondria
(b) Chromatophores
(c) Chloroplasts
(d) Chlorophyll
Answer
Answer: (c) Chloroplasts
Question 24.
In photosynthesis
(a) CO2 is reduced while water is oxidised
(b) Both CO2 and H2O are oxidised
(c) CO2 is oxidised while H2O is reduced
(d) Both CO2 and H2O are oxidised
Answer
Answer: (a) CO2 is reduced while water is oxidised.
Question 25.
In C3 plants, the first stable product of photosynthesis is
(a) Ribulose biphosphate
(b) Oxaloacetic acid
(c) Phosphoglyceric acid
(d) Glvceraldehyde 3-phosphate
Answer
Answer: (c) Phosphoglyceric acid.
Question 26.
Chloroplast DNA or Cl– DNA is
(a) Circular
(b) Single stranded
(c) Naked
(d) All of these
Answer
Answer: (d) All of these
Question 27.
Photosynthetic units are of two types
(a) Photosystem I and II
(b) Chlorophylls and Carotenoids
(c) Carotenoids and phvcobilins
(d) Chlorophyll a and Chlorophyll b
Answer
Answer: (a) Photosystem I and II
Question 28.
Most effective wave length of light for photosynthesis is
(a) Yellow
(b) Green
(c) Red
(d) violet
Answer
Answer: (a) Red
Question 29.
Chloroplast pigments are
(a) Chlorophylls
(b) Phvcobilins
(c) Carotenoids
(d) All of these
Answer
Answer: (d) All of these
Question 30.
During synthesis of a glucose molecule, ATP and NADPH consumed are respectively
(a) 12 and 8
(b) 18 and 12
(c) 15 and 12
(d) 30 and 20
Answer
Answer: (b) 18 and 12
Question 31.
If plant stop photosynthesis which gas will disappear
(a) CO2
(b) O2
(c) NH3
(d) N2
Answer
Answer: (b) O2
Question 32.
Which plant shows chloroplast dimorphism?
(a) Rice
(b) Sugar Beet
(c) Sugarcane
(d) Wheat
Answer
Answer: (c) Sugarcane
Question 33.
First product of photorespiration is
(a) Glycolate
(b) Glycine
(c) Phosphoglycolate
(d) Glyceine
Answer
Answer: (c) Phosphoglycolate
Question 34.
Which is a C4 Plant?
(a) Sugarcane
(b) sorghum
(c) Maize
(d) All of these
Answer
Answer: (d) All of these
Question 35.
Natural hydrogen acceptor of Hill reaction is
(a) NADPH
(b) H2O
(c) NADP
(d) None of these
Answer
Answer: (c) NADP
Question 36.
Photorespiration is characteristic of
(a) CAM Plants
(b) C3 plants
(c) C4 Plants
(d) All of these
Answer
Answer: (b) C3/sub> plants
Question 37.
Calvin cycle is
(a) Dependent upon light
(b) Independent of light
(c) Inhibited by light
(d) Supported by light
Answer
Answer: (d) Supported by light
Question 38.
Which one is common product of both photosynthesis and respiration?
(a) ATP
(b) Chlorophyll
(c) Cytochrome
(d) Quinone
Answer
Answer: (a) ATP
Question 39.
C4 Cycle was discovered in
(a) Chrysanthemum
(b) Groundnut
(c) Apple/Pea
(d) Sugarcane
Answer
Answer: (d) Sugarcane
Question 40.
In C4 Plants, fixation of CO2 occurs in
(a) cortex of stem
(b) palisade tissue
(c) Transfusion
(d) Spongy mesophyll and bundle sheath cells
Answer
Answer: (d) Spongy mesophyll and bundle sheath cells
Question 41.
Calvin cycle is investigated by the use of
(a) C14
(b) C12
(c) O18
(d) O16
Answer
Answer: (a) C14
Question 42.
The first receiver of CO2 in C4 plants is :
(a) Malic acid
(b) Phosphophenol
(c) Qxaloacetic acid
(d) Aspartic acid
Answer
Answer: (c) Qxaloacetic acid
Question 43.
The acceptor of CO2 in C3 plants is
(a) Xglulose-5-Phosphate
(b) 3- phosphoglyceric acid
(c) Phosphoenol pyruvic acid
(d) Ribulose 1, 5 biphosphate
Answer
Answer: (c) Ribulose 1, 5 biphosphate
Question 44.
RUBP of Calvin cycle is called in C4 plants
(a) Secondary of final acceptor of CO2
(b) Primary acceptor of CO2
(c) Both (a) and (b)
(d) None of these
Answer
Answer: (a) Secondary of final cycle is called in CO2
II. Fill in the blanks:
Question 1.
All animals including human beings depend on …………. for their food.
Answer
Answer: plants
Question 2.
Green plants carry out …………….. process by which they use light energy to derive the synthesis of organic compounds.
Answer
Answer: photosynthesis a physico chemical
Question 3.
Photosynthesis is important for life due to two reasons: It is the ……………. by which all food gets synthesised on earth and is also responsible for the release of ………… into the atmosphere by plants.
Answer
Answer: mechanism, oxygen
Question 4.
A first ………., ………… of photosynthesis was thus described.
Answer
Answer: action, spectrum
Question 5.
A milestone contribution to the understanding of …………… was that made by a microbiologist, ………….. (1897-1985), who based on his studies of ………….. and green …………
Answer
Answer: photosynthesis, Cornelius van Niel, purple, bacteria
Question 6.
6CO2 + 12H2O ……………..
Answer
Answer:
Question 7.
The membrane system is responsible for trapping the light energy and synthesising of ………. and …………..
Answer
Answer: ATP, NADPH
Question 8.
The former sets or reactions since they are light dependent are called ……………
Answer
Answer: light reactions
Question 9.
ATP and NADPH, can theoretically take place in the dark and are called ……………
Answer
Answer: dark reactions
Question 10.
Chromatography, that literally means ‘…………..’
Answer
Answer: colour writing
Question 11.
We see in leaves is not due to a single pigment but due to four pigments: chlorophyll a (bright or blue green in the chromatogram), chlorophyll b (yellow green), ………… (yellow) and …………. (yellow to yellow-orange).
Answer
Answer: Xanthophylls, Carotenoids
Question 12.
Of course you are familiar with the. wavelength of the visibl specturm of light as well as the ……………
Answer
Answer: VIBGYOR
Question 13.
The pigments chlorophyll b and the carotenoids -Xanthophylls and carotene are called …………….
Answer
Answer: accessory pigments
Question 14.
In PSI the reaction centre chlorophyll a has an absoiption pea at 700 nm hence is called ……………. while in PS II it has absorption maxim.” at 680 nm, and is called ……………
Answer
Answer: P700, P680
Question 15.
When the two photosystems work in a series, first PS II and the: PS I, a process called …………….. occurs.
Answer
Answer: non-cyclic photo-phosphosylation
Question 16.
The Calvin pathway occurs in ……………
Answer
Answer: all photorynthetic plants
Question 17.
C4 plants are special they have a special type of …………. anatomy they tolerate higher ………….. they show a response to highligh ………., they lack a process called ………….. and have greate productivity.
Answer
Answer: leaf, temperatures, intensities, photorespiration
Question 18.
The particularly large cells around the vascular bundles of the C4 pathway plants are called ………….. and the leaves which have such anatomy are said to have ‘…………..’ anatomy.
Answer
Answer: bundle sheath cells, Kranz
Question 19.
In C3 plants some O2 does bind to RuBisco, and hence CO2 fixation is decreased. Here the RUBP instead of being converted to PGA is broken down in a pathway called …………….
Answer
Answer: Photorespiration
Question 20.
The C4 plants respond to ………….. and show higher rate of …………. while C3 plants have a much ………….
Answer
Answer: higher temperatures, photosynthesis, temperature optimum
III. Mark the statement True (T) or False (F)
Question 1.
Water stress causes the stomata to close hence reducing the CO2 availability.
Answer
Answer: True
Question 2.
Tropical plants have a higher temperature optimum than that of the plants adapted to temperate climates.
Answer
Answer: True
Question 3.
The C4 plants show saturation at about 450 µ. L-1 while C3 responds to increased CO2 concentration and saturation is seen only beyond 360µ. L-1
Answer
Answer: True
Question 4.
Green plants carry out ‘photosynthesis’, a physico-chemical process by which they use light energy to drive the synthesis of organic compounds.
Answer
Answer: True
Question 5.
Julius Von Sachs in 1770’s performed a series of experiment that revealed the essential role of air in growth of green plants.
Answer
Answer: False
Question 6.
Joseph Priestlay showed that sunlight is essential to the plant process that somehow purifies the air fouled by burning candles or breathing animals.
Answer
Answer: False
Question 7.
Jan Ingenhourz provided evidence for production of glucose when plants grow.
Answer
Answer: False
Question 8.
The former set of reations since they are light dependent, are called light reactions.
Answer
Answer: True
Question 9.
The pigments are organised into two discrete photochemical fight harvesting complexes (LHC) called photosystem I (PS-I) and Photosystem II (PS II).
Answer
Answer: True
Question 10.
Reduction is the most crucial step of the Calvin cycle where CO2 is utilised for the carboxylation of RUBP.
Answer
Answer: False
Question 11.
C4 Plants are special: They have a special type of leaf anatomy, they tolerate higher temperatures, they show a response to high fight intensities, they lack a process called photorespiration and have greater productivity of biomass.
Answer
Answer: True
Question 12.
The primary CO2 acceptor is 3 carbon molecule phosphoenol pyruvate (PEP) and is present in the mesophyll cells.
Answer
Answer: True
Question 13.
Oxygen is the major limiting factor for photosynthesis.
Answer
Answer: False
Question 14.
The C3 plants respond to higher temperatures and show higher rate of photosynthesis while C4 plants have a much lower temperature optimum.
Answer
Answer: False
Question 15.
The vascular bundles of the C4 pathway plants are called bundle sheath cells, and the leaves which have such anatomy are said to have ‘kranz’ anatomy.
Answer
Answer: True
IV Match the items in Column I with the items in Column II
| Column I | Column II |
| (a) Photosynthesis | 1. Out 18 ADP |
| (b) It was not until about 1854 that Julius | 2. Law of limiting factors |
| (c) T.W Engelmann | 3. Consisting of cytochromes |
| (d) The former set of reactions since they are directly light driven | 4. a physico-chemical process |
| (e) Wavelength of the visible specturm | 5. light absorption, water splitting, oxygen release |
| (f) electrons transport system | 6. the plants adapted to temperate climates. |
| (g) Calvin cycle : In 18 ATP | 7. Von Sachs provided evidence for production of glucose when plants grow. |
| (h) Calvin cycle : In six CO2 | 8. of light as well as the VIBGYOR. |
| (i) RiBulose bisphosphate carboxy-lase-oxygenase | 9. Using a prism he split light into its spectral components and then illuminated a green alga, cladophora. |
| (j) Blackman’s (1905) | 10. are called dark reactions |
| (k) Tropical plants have a higher temperature optimum than | 11. out one Glucose |
| (l) Photochemical phase | 12. (RuBisco) |
| (m) PS I | 13. P700 |
| (n) PS II | 14. Purple and green bacteria |
| (o) Cornelius Van Niel (1897 – 1985), who based on his studies of | 15. P680 |
Answer
Answer:
| Column I | Column II |
| (a) Photosynthesis | 4. a physico-chemical process |
| (b) It was not until about 1854 that Julius | 7. Von Sachs provided evidence for production of glucose when plants grow. |
| (c) T.W Engelmann | 9. Using a prism he split light into its spectral components and then illuminated a green alga, cladophora. |
| (d) The former set of reactions since they are directly light driven | 10. are called dark reactions |
| (e) Wavelength of the visible specturm | 8. of light as well as the VIBGYOR. |
| (f) electrons transport system | 3. Consisting of cytochromes |
| (g) Calvin cycle : In 18 ATP | 1. Out 18 ADP |
| (h) Calvin cycle : In six CO2 | 11. out one Glucose |
| (i) RiBulose bisphosphate carboxy-lase-oxygenase | 12. (RuBisco) |
| (j) Blackman’s (1905) | 2. Law of limiting factors |
| (k) Tropical plants have a higher temperature optimum than | 6. the plants adapted to temperate climates. |
| (l) Photochemical phase | 5. light absorption, water splitting, oxygen release |
| (m) PS I | 13. P700 |
| (n) PS II | 15. P680 |
| (o) Cornelius Van Niel (1897 – 1985), who based on his studies of | 14. Purple and green bacteria |
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