MCQ Questions for Class 11 Biology Chapter 14 Respiration in Plants 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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