Important Questions for Class 11 Biology 14th Chapter Respiration In Plants MCQ, Very Short, Short Type, Long Type
CBSE Class 11 Important Questions for Class 11 Biology Chapter 14 Respiration In Plants all MCQ Type, Very Short Type, Assertion Reason Type, Case Study, Short Type and Long Type Questions with Answers by Expert. Important Questions for Section A, B, C, D Class 11 Biology Chapter 14.
- MCQs
Q.1)Muscles during exercise, with insufficient oxygen for cellular respiration pyruvicacid is reduced to lactic acid by enzyme
a) lactate dehydrogenase
b) lactate decarboxylase
c) alcohol dehydrogenase
d) lactate synthase
Q.2) Assertion: Kreb cycle occurs in cytoplasm.
Reason: Enzymes for Kreb cycle are found in cytoplasm.
a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.
c.) If assertion is true but the reason is false.
d.) If both assertion and reason are false.
Q.3) Mobile carrier of electrons in electron transport chain is
a) cytochrome a
b) cytochrome bc1
c) cytochrome c
d) cytochrome a3
Q.4) Assertion: Fermentation is the incomplete oxidation of glucose
Reason: It occurs in aerobic conditions only.
a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.
c.) If assertion is true but the reason is false.
d.) If both assertion and reason are false.
Q.5) Assertion: From ubiquinone electrons are accepted by the complex II
Reason: Electrons are transferred from complex II to cytochrome c, which acts as a mobile carrier.
a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.
c.) If assertion is true but the reason is false.
d.) If both assertion and reason are false
Q.6) Assertion: In eukaryotes, photosynthesis takes place within the chloroplasts.
Reason: The breakdown of complex molecules to yield energy takes place in the cytoplasm and in the mitochondria
a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.
c.) If assertion is true but the reason is false.
d.) If both assertion and reason are false.
Q.7) The final product of aerobic respiration is
a.) CO2, Water and energy
b.) CO2, Oxygen, water
c.) Water, energy, oxygen
d.) CO2, energy, water
Q.8)the anaerobic degradation of glucose to obtain energy is
a) Anabolism
b) Oxido-reduction
c) Fermentation
d) Catabolism
Q.9) In glycolysis, Dihydroxyacetone phosphate is reversibly converted to ___________
a) Glyceraldehyde 3-phosphate
b) 1, 3-bis-phosphoglycerate
c) Phosphoenol pyruvate
d) 2- phospoglycerate
Q.10)The Kreb cycle’s only membrane-bound enzyme is
1.) Citrate synthase
2.) Succinate dehydrogenase
3.) Malate dehydrogenase
4.) Fumrase
- Answer in one sentence
Q.1) What is the fate of pyruvate?
Ans. Different cells metabolize pyruvic acid produced by glycolysis in three different ways depending on need of the cell. Lactic acid fermentation, alcoholic fermentation, and aerobic respiration are the three fates of pyruvate.
Q.2) State the difference between photophosphorylation and oxidative phosphorylation.
Ans. Photophosphorylation where it is the light energy that is utilized for the production of proton gradient required for phosphorylation, in oxidative phosphorylation it is the energy of oxidation-reduction that is utilized for the same process.
Q.3) How is the electrochemical gradient generated in Complex V of the ETS?
Ans. The generation of ATP is linked to the transit of protons through the channel by the F1 component’s catalytic site. 2H+ flows through F0 from the intermembrane space to the matrix along the electrochemical proton gradient for each ATP generated.
Q.4) What is respiratory quotient?
Ans. The respiratory quotient (RQ) or respiratory ratio is the ratio of the volume of CO2 evolved to the volume of O2 consumed in respiration.
Q.5) What is catabolism and anabolism?
Ans. Catabolism is the breakdown of processes within a living organism, while anabolism is the synthesis of new ones.
Q.6) Why is respiration an amphibolic process?
Ans. The respiratory system is engaged in both anabolism and catabolism, hence it as an amphibolic process.
- Answer in short
Q.1) What are the crucial events in aerobic respiration?
Ans. 1.) The total oxidation of pyruvate by removing all hydrogen atoms one at a time, releasing three molecules of CO2.
2.) The electrons extracted as part of the hydrogen atoms are transferred to molecular O2 while ATP is synthesized at the same time.
Q.2) Name the 5 enzyme complexes precent in the Electron transport chain.
Ans. the 4 complexes are:
1.) NADH dehydrogenase (complex I),
2.) Succinate dehydrogenase (complex II),
3.) Cytochrome bc1 (complex III),
4.)Cytochrome c oxidase complex(complex IV)
5.) ATP synthase (complex V)
Q.3) Describe the structure of ATP synthase (complex V).
Ans. 1.) F1 and F0 are the two principal components of the complex V.
2.) The F1 headpiece is a protein complex found on the periphery of the membrane that contains the location for ATP production from ADP and inorganic phosphate.
3.) F0 is a membrane protein complex that serves as a route for protons to pass through the inner membrane.
Q.4) State the important steps in aerobic respiration.
Ans. Aerobic respiration consists of different processes
i) glycolysis,
ii) oxidative decarboxylation of pyruvic acid,
iii) Krebs’ cycle and
iv) terminal oxidation and oxidative phosphorylation.
- Answer in brief
Q.1) Distinguish between fermentation and aerobic respiration.
Fermentation |
Aerobic respiration |
Glucose is only partially broken-down during fermentation. | Glucose is totally broken down into CO2 and H2O during aerobic respiration |
Fermentation generates just two molecules of ATP for every molecule of glucose degraded to pyruvic acid. | Aerobic conditions yield 38 molecules of ATP from oxidation of pyruvate |
In fermentation, NADH is oxidized to NAD+ slowly. | In aerobic respiration, the reaction is much faster. |
Q.2) Is pyruvate from glycolysis directly used in kreb cycle?
Ans. 1.) Pyruvate, which is produced in the cytosol by glycolytic catabolism of carbohydrates, is oxidatively decarboxylated in the mitochondrial matrix by a complicated set of processes catalyzed by pyruvic dehydrogenase.
2.) Several coenzymes, notably NAD+ and Coenzyme A, are required for the processes catalyzed by pyruvic dehydrogenase.
3.) Two molecules of NADH are created during this process from the metabolism of two molecules of pyruvic acid (made during glycolysis from one glucose molecule).
4.) The acetyl CoA subsequently joins the tricarboxylic acid cycle, which is a cyclic process.
Q.3) Give schematic representation of Interdependence of metabolic processes demonstrating respiration CO2 and H20 are produced as a result of the breakdown of various chemical compounds.