Please refer to Chapter 14 Respiration in Plants MCQ Class 11 Biology with answers below. These multiple-choice questions have been prepared based on the latest NCERT book for Class 11 Biology. Students should refer to MCQ Questions for Class 11 Biology with Answers to score more marks in Grade 11 Biology exams. Students should read the chapter Respiration in Plants and then attempt the following objective questions.

MCQ Questions Class 11 Biology Chapter 14 Respiration in Plants

The Respiration in Plants MCQ Class 11 Biology provided below covers all important topics given in this chapter. These MCQs will help you to properly prepare for exams.

Question.  In glycolysis, which of the molecules undergoes splittng to produce 2 isomers of each other.
(a) Fructose. 1, 6 diphosplhale
(b) 1. 3, diPGA
(C) Glucose
(d) PEP

Question.  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

Question. Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates and proteins?
(a) Glucose -6-phosphate
(b) Fructose 1,6-bisphosphate
(c) Pyruvic acid
(d) Acetyl Co-A

Question.  A connecting link between TCA cycle and nitrogen metabolistm is____
(a) Pyruvic acid
(b) a-ketoglutaric acid
(C) OAA
(d) Citric acid

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

Question. The number of substrate level of phosphorylations in one turn of citric acid cycle is
(a) One
(b) Two
(c) Three
(d) Four

Question.  Which is a mobile e-carrier in ETS in mitochondria?
(a) Cyt C
(b) Cytc1
(c) Cyt a3
(d) all off these

Question.  glycolysis ts regulated by_______
(a) phosphofrutokinase
(b) ATP/AMP ratio
(c) Ratio of NAD/NADH
(d) All of these

Question. Connecting link between glycolysis and Krebs cycle is/before entering Krebs cycle pyruvate is changed to:
(a) oxaloacetate
(b) PEP
(c) pyruvate
(d) acetyl CoA

Question. 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

Question. The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that Adenosine Triphosphate ATP is formed because
(a) high energy bonds are formed in mitochondrial proteins
(b) ADP is pumped out of the matrix into the intermembrane space
(c) a proton gradient forms across the inner membrane
(d) there is a change in the permeability of the inner mitochondrial membrane toward Adenosine Diphosphate ADP

Question.  In ETS, the nurmber of proton pumps when FADH2 donates e- is____
(a) 3
(b) 2
(C) 4
(d) 1

Question. All reactions of TCA cycle occur in matrix of mitochondria except_________
a) Oxidation of Malate
(b) Reduction of FADD
(c) Decarboxylation of oxalo succinic acid
(d) Break down of malic acid

Question. The net gain of ATP during glycolysis is
(a) 4
(b) 8
(c) 2
(d) 6

Question. Oxidative phosphorylation is production of
(a) ATP in photosynthesis
(b) NADPH in photosynthesis
(c) ATP in respiration
(d) NADH in respiration

Question. In which one of the following processes CO₂ is not released?
(a) Aerobic respiration in plants
(b) Aerobic respiration in animals
(c) Alcoholic fermentation
(d) Lactate fermentation

Question.  The meeting ground of all food stutfs is__________
(a) Pyruvic acid
(b) Citric acid
(c) Acetyl CoA
(d) All of these

Question.  ETC poisons are________
(a) Cyanide
(b) Rotenone
(C) Barbituratess
(d) All of these

Question.  1 molecule of acetyl Co-A produces________
(a) 15 ATP
(b) 14 ATP
(c) 12 ATP
(d) 18 ATP

Question. Maximum amount of energy/ATP is liberated on oxidation of:
(a) fats
(b) proteins
(c) starch
(d) vitamins

Question. Cytochromes are concerned with
(a) Protein synthesis
(b) Cellular digestion
(c) Cell division
(d) Cell-respiration

Question.  The co- factor of succinic dehydrogenase is ________
(a) NADP
(b) FAD
(c) TPP
(d) NAD

Question. How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to CO₂ and H₂O yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 Kcal?
(a) Two
(b) Thirty
(c) Fifty seven
(d) One

Question. 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₊

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

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

Question. The complete oxidation of pyruvate take place in
(a) cell cytoplasm
(b) inner mitochondrial membrane
(c) mitochondrial matrix
(d) nucleus

Question. When one glucose molecule is completely oxidised, it changes:
(a) 36 ADP molecules into 36 ATP molecules
(b) 38 ADP molecules into 38 ATP molecules
(c) 30 ADP molecules into 30 ATP molecules
(d) 32 ADP molecules into 32 ATP molecules

Question. 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 18 CO₂
(c) 18O from H₂ 18O
(d) .None of these

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

Question. Respiratory Quotient RQ value of tripalmitin is:
(a) 0.09
(b) 0.9
(c) 0.7
(d) 0.007

Question. 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

Question. The universal hydrogen acceptor is
(a) NAD
(b) ATP
(c) Co-A
(d) FMN

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

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

Question.  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.

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

Question. 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.

Question.  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.

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

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