MCQ Questions for Class 11 Biology Chapter 14 Respiration in Plants with Answers

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Respiration in Plants Class 11 MCQs Questions with Answers

Solving the Respiration in Plants Multiple Choice Questions of Class 11 Biology Chapter 14 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Respiration in Plants Class 11 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 14 Biology Class 11 and cross-check your answers during preparation.

I. Select the correct answer from the following questions:

Question 1.
Major fraction of CO2 released during cellular respiration is transported in blood through the lungs in the form of
(a) Free CO2
(b) HCO3
(c) H2 CO3
(d) In combination with Hb CO2

Answer

Answer: (c) H2 CO3


Question 2.
Sudden deep inspiration is due to
(a) Increase in concentration of CO2
(b) Increase in concentration of O2
(c) Either increase in cone, of CO2 or decrease in concentration of O2
(d) Decrease in concertration of CO2

Answer

Answer: (a) Increase in concentration of CO2


Question 3.
Fixing of CO2 and liberation of oxygen in light is done with the help of
(a) chioroplast
(b) Mesophyll cells
(c) Mitocondria
(d) Chromatophores

Answer

Answer: (a) Chioroplast


Question 4.
AH vegetation is only due to
(a) CO2
(b) Water
(c) Oxygen
(d) Hydrogen

Answer

Answer: (b) Water


Question 5.
Chioroplast DNA or ct DNA is
(a) Naked
(b) Circular
(c) Single stranded
(d) All of these

Answer

Answer: (d) All of these


Question 6.
During synthesis of a glucose molecule, ATP and NADPH consumed are respectively
(a) 15 and 12
(b) 12 and 8
(c) 30 and 20
(d) 18 and 12

Answer

Answer: (d) 18 and 12


Question 7.
Photorespiration takes place in
(a) Lvsosomes
(b) Peroxisomes
(c) Ribosomes
(d) Mitochondria

Answer

Answer: (b) Peroxisomes


Question 8.
Chlorophyll ‘a’ is found in all
(a) Oxygen liberation photosvnthetic organisms
(b) Autotrophs
(c) Higher plants
(d) Algae

Answer

Answer: (a) Oxygen liberation photosynthetic organisms


Question 9.
The atmosphere contains CO2 by volume
(a) 0.1%
(b) 0.5%
(c) 0.03%
(d) 0.3%

Answer

Answer: (c) 0.03 %


Question 10.
Green plants convert solar energy into chemical energy of organic matter was proved by
(a) Van Mayer
(b) Lavoisier
(c) Joseph Priestly
(d) Semebier

Answer

Answer: (a) Van Mayer


Question 11.
Wastage of energy is associated with
(a) Glycolysis
(b) Photosynthesis
(c) Krebs cycle
(d) Photorespiration

Answer

Answer: (d) Photorespiration


Question 12.
If a photosvnthesising plant releases oxygen containing more amount of lsO, it is concluded that the plant has been supplied with
(a) 18O from 18 CO2
(b) 18O from 18CO2
(c) 18O from H2 18O
(d) .None of these

Answer

Answer: (c) 18 O from H2 18O


Question 13.
Carbon dioxide acceptor in C3 plants is:
(a) RuBP
(b) RMP
(c) PGA
(d) PEP

Answer

Answer: (a) RuBP


Question 14.
Photosynthetic process is completed in
(a) Chloroplasts
(b) Chlorophyll
(c) Chromatophores
(d) Mitochondria

Answer

Answer: (a) Chloroplasts.


Question 15.
During synthesis of a glucose molecule, ATP and NADPH consumed are respectively
(a) 12 and 8
(b) 30 and 20
(c) 15 and 12
(d) 18 and 12

Answer

Answer: (d) 18 and 12


Question 16.
First product of photorespiration is
(a) Glycolate
(b) Glycine
(c) Glvceine
(d) Phosphoglycolate

Answer

Answer: (d) Phosphoglycolate


Question 17.
The breaking of the C-C bonds of complex compounds through oxidation within the cells, leading to release of considerable amount of energy is called
(a) respiration
(b) respiratory substrates
(c) Cellular respiration
(d) All of these

Answer

Answer: (a) Respiration


Question 18.
The TCA cycle starts with the condensation of acetyl group with
(a) Oxaloacetic acid
(b) Water to yield citric acid
(c) (a) and (b) Both
(d) None of these

Answer

Answer: (c) (a) and (b) Both


Question 19.
The metabolic pathway through which the electron passes from one carrier to another, is called the
(a) Electron transport system
(b) Complex I
(c) Complex II
(d) Complex IV

Answer

Answer: (a) Electron transport system


Question 20.
NADH produced in the mitochondrial matrix during citric acid cycle are oxidised by an NADH dehydrogenase
(a) Complex I
(b) Complex II
(c) Complex III
(d) Complex IV

Answer

Answer: (a) Complex I


Question 21.
The energy released during the electron transport system is utilised in synthesising ATP with the help of ATP synthase
(a) Complex III
(b) Complex IV
(c) Complex V
(d) None of these

Answer

Answer: (c) Complex V


Question 22.
The ratio of the volume of CO2 evolved to the volume of O2 consumed in respiration is called the
(a) respiratory quotient
(b) amphibolic pathway
(c) catabolism
(d) anabolism

Answer

Answer: (a) Respiratory quotient.


II. Fill in the blanks:

Question 1.
All the energy required for ‘life’ processes is obtained by oxidation of some macromolecules that we call ……………

Answer

Answer: Food


Question 2.
Green plants trap light energy and convert it into chemical energy that is stored in the bonds of carbohydrates like ………., ………… and ………….

Answer

Answer: glucose, sucrose, starch


Question 3.
Animals are …………… i.e. they obtain food form plants directly (herbivores) or indirectly (carnivores).

Answer

Answer: heterotrophic


Question 4.
The compounds that are oxidised during this process are known as …………….

Answer

Answer: respiratory substrates


Question 5.
………., ………… and …………. respire at rates far lower than are characteristic for animals.

Answer

Answer: Root, stems, leaves


Question 6.
In stems, the ‘…………..’ cells are organised in thin layers in and beneath the bark.

Answer

Answer: living


Question 7.
The complete ……………. of glucose, which produces CO2 and H2O as end products, yields energy most of which is given out as heat.

Answer

Answer: combustion


Question 8.
The scheme of glycolysis was given by …………….. and J.Pamas, and is often referred to as the …………. pathway.

Answer

Answer: Gustav Embden, Otto Meyerhof, EMP


Question 9.
……………. are phosphorylated to give rise to glucose- 6-phosphate by the activity of the enzyme hexokinase.

Answer

Answer: Glucose and fructose


Question 10.
ATP is utilised at two steps: first in the conversion of ………… into glucose 6-phosphate and second in the conversion of ………….. 6- phosphate to fructose 1, 6-diphosphate.

Answer

Answer: glucose, fructose


Question 11.
These are ………….. major ways in which different cells handle Pyruvic acid produced by glycolysis.

Answer

Answer: three,


Question 12.
In fermentation, say by yeast, the incomplete oxidation of glucose is achieved under anaerobic conditions by sets of reactions where ………… is converted to CO2 and ethanol.

Answer

Answer: Irrational


Question 13.
In a coupled reaction GTP is converted to GDP with the stimultaneous synthesis of ……….. from …………

Answer

Answer: ATP, ADP


Question 14.
When the electrons pass from one carrier to another via complex I to IV in the electron transport chain, they are coupled to ATP synthase (complex V) for the production of …………. from …………… and ……………..

Answer

Answer: ATP, ADP, inorganic phosphate


Question 15.
………… is favoured substrate for respiration.

Answer

Answer: Glucose


III. Mark the statement True (T) or False (F)

Question 1.
Saprophytes like fungi are dependent on green plant.

Answer

Answer: False


Question 2.
Usually carbohydrates are oxidised to release energy, but proteins, fats and even organic acids can be used as respiratory substances in some plants, under certain conditions.

Answer

Answer: True


Question 3.
Only during photosynthesis are large volumes of gases exchanged and each leaf is well adapted to take care of its own needs during these periods.

Answer

Answer: True


Question 4.
In stems, the ‘living’ cells are organised in thin layers in and beneath the bark. They also have openings called lenticels.

Answer

Answer: True


Question 5.
The combustion reaction requires carbon.

Answer

Answer: False


Question 6.
Sucrose is converted into glucose and fructose by the enzyme invertase, and these two monosaccharides can readily enter the glycolytic pathway.

Answer

Answer: True


Question 7.
For the complete oxidation of glucose to O2 and CO2, however, organisms adopt Kreb’s cycle which is also called as aerobic respiration. This requires CO2 supply.

Answer

Answer: False


Question 8.
Yeasts poison themselves to death when the concentration of alcohol reaches about 25 percent.

Answer

Answer: False


Question 9.
The complete oxidation of pyruvate by the stepwise removel of all the hydrogen atoms, leaving three molecules of CO2.

Answer

Answer: True


Question 10.
In the remaining steps of citric acid cycle, succinyl-CoA is oxidised to OAA allowing the cycle to continue.

Answer

Answer: True


Question 11.
The reduced ubiquinone (Ubiquinol) is than oxidised with the transfer of electrons to cytochrome C via cytochrome be complex (complex III).

Answer

Answer: True


Question 12.
The F1 headpiece is a peripheral membrane protein complex and contains the site for synthesis of ATP from ADP and inorganic phosphate.

Answer

Answer: True


Question 13.
NADH is oxidised to NAD rather slowly in fermentation, however the reaction is very vigorous in case of aerobic respiration.

Answer

Answer: True


Question 14.
Glycerol would enter the pathway after being conveted to PGAL.

Answer

Answer: True


Question 15.
Pure proteins or fats are never used as respiratory substrates.

Answer

Answer: True


IV. Match the items of column I with the items of column II

Column I Column II
(a) Plants require O2 for respiration to occur 1. TCA
(b) Breakdown of glucose to Dyruvic acid is 2. Converted into DPGA.
(c) PGAL is oxidised and with inorganic phosphate to get 3. inadequate for cellular respiration pyruvic acid is reduced to lactic acid by locate dehydrogenase.
(d) Pyruvic acid is then the key product 4. and they also give out CO2
(e) In animal cells also, like muscles during exercise, when oxygen is 5. NADH + H+ and FADH2
(f) Aerobic respiration 6. called glycolysis
(g) Pyruvate is transported from the cytoplasm into the mitochondria. 7. oxidative phosphorylation.
(h) Tricarboxylic acid cycle 8. of glycolysis.
(i) Citrate is then isomerised to isocitrate 9. through which protons cross the inner membrane
(j) In the respiratory process are to release and utilise the energy stored in 10. The NADH synthesised in glycolysis is transferred into the mitochondria and under-goes oxidative phosphorylation.
(k) In respiration it is the energy of oxidation-reduction utilised for the same process. 11. Aerobic respiration
(l) F0 is an integral membrane protein complex that form the channel 12. is the process that leads to a complete oxidation of organic sub-stances in the presence of oxygen, and releases CO2
(m) The respiratory balance sheet 13. It is followed by two successive steps of decarboxylation, leading to the formation of α -ketoglutaric acid then succinvI-CoA
(n) Glycerol would enter the pathway after being converted to 14. PGAL
(o) RQ + 15. Volume of CO2 evolved
Answer

Answer:

Column I Column II
(a) Plants require O<sub>2</sub> for respiration to occur 4. and they also give out CO<sub>2</sub>
(b) Breakdown of glucose to Dyruvic acid is 6. called glycolysis
(c) PGAL is oxidised and with inorganic phosphate to get 2. Converted into DPGA.
(d) Pyruvic acid is then the key product 8. of glycolysis.
(e) In animal cells also, like muscles during exercise, when oxygen is 3. inadequate for cellular respiration pyruvic acid is reduced to lactic acid by locate dehydrogenase.
(f) Aerobic respiration 12. is the process that leads to a complete oxidation of organic sub-stances in the presence of oxygen, and releases CO2
(g) Pyruvate is transported from the cytoplasm into the mitochondria. 11. Aerobic respiration
(h) Tricarboxylic acid cycle 1. TCA
(i) Citrate is then isomerised to isocitrate 13. It is followed by two successive steps of decarboxylation, leading to the formation of α -ketoglutaric acid then succinvI-CoA
(j) In the respiratory process are to release and utilise the energy stored in 5. NADH + H+ and FADH2
(k) In respiration it is the energy of oxidation-reduction utilised for the same process. 7. oxidative phosphorylation.
(l) F0 is an integral membrane protein complex that form the channel 9. through which protons cross the inner membrane
(m) The respiratory balance sheet 10. The NADH synthesised in glycolysis is transferred into the mitochondria and under-goes oxidative phosphorylation.
(n) Glycerol would enter the pathway after being converted to 14. PGAL
(o) RQ + 15. Volume of CO2 evolved

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