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BIOLOGY M.C.Q (1 Marks)

Respiration In Plants · MP Board (MPBSE) STD 11 Science (Madhya Pradesh - English Medium). 156 questions.

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M.C.Q (1 Marks)

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MCQ 11 Mark
Krebs' cycle takes place in:
  • A
    Cytoplasm
  • B
    Chloroplast
  • C
    Nucleus
  • ✓
    Mitochondria
Answer
Correct option: D.
Mitochondria
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MCQ 21 Mark
In which one of the following do the two names refer to one and the same thing?
  • A
    Tricarboxylic acid cycle and urea cycle.
  • B
    Krebs cycle and Calvin cycle.
  • ✓
    Tricarboxylic acid cycle and citric acid cycle.
  • D
    Citric acid cycle and Calvin cycle.
Answer
Correct option: C.
Tricarboxylic acid cycle and citric acid cycle.
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MCQ 31 Mark
The major reason that glycolysis is not as energy productive as respiration is that.
  • ✓
    Pyruvate is more reduced than $CO_2$ it still contains much of the energy from glucose.
  • B
    It does not take place in a specialized membrane$-$bound organelle.
  • C
    It is the pathway common to fermentation and respiration.
  • D
    None of these.
Answer
Correct option: A.
Pyruvate is more reduced than $CO_2$ it still contains much of the energy from glucose.
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MCQ 41 Mark
Which of the following is the first step of glycolysis?
  • A
    Breakdown of glucose
  • ✓
    Phosphorylation of glucose
  • C
    Conversion of glucose into fructose
  • D
    Dehydrogenation of glucose
Answer
Correct option: B.
Phosphorylation of glucose
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MCQ 51 Mark
Krebs cycle occurs in.
  • ✓
    Mitochondria.
  • B
    Cytoplasm.
  • C
    Chloroplast.
  • D
    Ribosomes.
Answer
Correct option: A.
Mitochondria.
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MCQ 61 Mark
Which of the following causes $\text{RQ}$ to vary?
  • ✓
    Respiratory substrate
  • B
    Light and $O_2$
  • C
    Respiratory product
  • D
    Temperature
Answer
Correct option: A.
Respiratory substrate
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MCQ 71 Mark
The respiratory quotient during cellular respiration would depend on:
  • A
    The nature of enzymes involved
  • ✓
    The nature of the substrate
  • C
    The amount of carbon dioxide released
  • D
    The amount of oxygen utilised
Answer
Correct option: B.
The nature of the substrate
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MCQ 81 Mark
What is the similarity between glycolysis and Krebs cycle?
  • A
    Formation of intermediate $5$ Compound
  • ✓
    Substrate level phosphorylation
  • C
    Oxidative phosphorylation
  • D
    Decarboxylation.
Answer
Correct option: B.
Substrate level phosphorylation
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MCQ 91 Mark
Ite of glycolysis or $\text{EMP}$ is:
  • A
    Mitochondria
  • ✓
    Cytoplasm
  • C
    $E.R.$
  • D
    Ribosomes
Answer
Correct option: B.
Cytoplasm
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MCQ 101 Mark
Degradation of sugar and fat to Acetyl $\text{CoA}$ will not take place if this organelle is not present in a eukaryotic cell. Which organelle is that?
  • A
    Golgi apparatus
  • ✓
    Mitochondria
  • C
    Ribosome
  • D
    Nucleus
Answer
Correct option: B.
Mitochondria
Degradation of sugar and fat to form acetyl$\text{-CoA}$ is the initial step in Krebs cycle.Krebs cycle takes place in mitochondria, which is called as the power house of cell. In aerobic respiration, major reactions take place in mitochondria.So, without it, aerobic respiration can not be completed.
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MCQ 111 Mark
The end product of oxidative phosphorylation is:
  • A
    $\text{NADH.}$
  • B
    Oxygen.
  • C
    $\text{ADP.}$
  • ✓
    $\text{ATP} + \ce{H_2O}$.
Answer
Correct option: D.
$\text{ATP} + \ce{H_2O}$.
Oxidative phosphorylation is the transfer of electrons to oxygen to form $\ce{H_2O}$ in the mitochondrial electron transport chain that is coupled to $\text{ATP}$ synthesis from $\text{ADP}$ and inorganic phosphate by the $\text{ATP}$ synthase.
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MCQ 121 Mark
Mitochondria are called powerhouses of the cell. Which of the following observations support this statement?
  • ✓
    Mitochondria synthesise $\text{ATP}.$
  • B
    Mitochondria have a double membrane.
  • C
    The enzymes of the Krebs cycle are found in mitochondria.
  • D
    Mitochondria are found in almost all plants and animal cells.
Answer
Correct option: A.
Mitochondria synthesise $\text{ATP}.$
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MCQ 131 Mark
Which one of the following cofactors a $\text{NOT}$ involved in the pyruvate dehydrogenate complex?
  • ✓
    Pyridoxal phosphate
  • B
    Thiamine Pryophosphate
  • C
    Lipoid acid
  • D
    Coenzyme $A$
Answer
Correct option: A.
Pyridoxal phosphate
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MCQ 141 Mark
A characteristic of drupe is:
  • A
    Fleshy seed coat.
  • B
    Stony pericarp.
  • C
    Stony mesocarp.
  • ✓
    Stony endocarp.
Answer
Correct option: D.
Stony endocarp.
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MCQ 151 Mark
Which of the following respiratory material requires the highest numbers of $O_2$​ molecules for its complete oxidation?
  • A
    Malic acid
  • ✓
    Triolein
  • C
    Tartaric acid
  • D
    Oleic acid
Answer
Correct option: B.
Triolein
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MCQ 161 Mark
Incomplete oxidation of glucose into pyruvic acid with several intermediate steps is know as
  • A
    $\text{TCA}$ pathway.
  • ✓
    Glycolysis.
  • C
    Hms pathway.
  • D
    Glycoly.
Answer
Correct option: B.
Glycolysis.
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MCQ 171 Mark
Which one is removed from substrate during glycolysis:
  • A
    Hydrogen
  • B
    Electrons
  • ✓
    Both $A$ and $B$
  • D
    Oxygen
Answer
Correct option: C.
Both $A$ and $B$
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MCQ 181 Mark
Apparatus to measure rate of respiration and $RQ$ is:
  • A
    Auxanometer.
  • B
    Potometer.
  • ✓
    Respirometer.
  • D
    Manometer.
Answer
Correct option: C.
Respirometer.
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MCQ 191 Mark
The overall goal of glycolysis, Krebs cycle and the electron transport system is the formation of:
  • ✓
    $\text{ATP}$ in small stepwise units.
  • B
    $\text{ATP}$ in one large oxidation reaction.
  • C
    Sugars.
  • D
    Nucleic acids.
Answer
Correct option: A.
$\text{ATP}$ in small stepwise units.
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MCQ 201 Mark
In Kreb’s cycle, the $\text{FAD}$ participates as electron acceptor during the conversion of.
  • A
    Fumaric acid to malic acid.
  • B
    Succinyl $\text{CoA}$ to succinic acid.
  • ✓
    Succinic acid to fumaric acid.
  • D
    None of these.
Answer
Correct option: C.
Succinic acid to fumaric acid.
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MCQ 211 Mark
At a temperature above $35^\circ C.$
  • ✓
    Rate of photosynthesis will decline earlier than that of respiration.
  • B
    Rate of respiration will decline earlier than that of photosynthesis.
  • C
    There is no fixed pattern.
  • D
    Both decline simultaneously.
Answer
Correct option: A.
Rate of photosynthesis will decline earlier than that of respiration.
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MCQ 221 Mark
Which of the following acts as mobile carrier for transfer of electrons between complex $III$ and complex $IV$?
  • ✓
    Cytochrome $c$
  • B
    Cytochrome $a_3$
  • C
    Cytochrome $a$
  • D
    $\ce{FADH_2}$
Answer
Correct option: A.
Cytochrome $c$
Cytochrome c is a small protein attached to outer surface of the inner membrane and acts as mobile carrier for transfer of electrons between complex $III$ and $IV$.
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MCQ 231 Mark
Out of $\text{36 ATP}$ molecules produced per glucose molecule during respiration.
  • A
    $2$ are produced outside glycolysis and $34$ during repiratory chain.
  • ✓
    $2$ are produced outside mitochondria and $34$ inside the mitochondria.
  • C
    All the formed inside mitochondria.
  • D
    $2$ during glycolysis and $34$ during kreds cycle.
Answer
Correct option: B.
$2$ are produced outside mitochondria and $34$ inside the mitochondria.
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MCQ 241 Mark
Angiosperm pollen is generally released at the:
  • A
    $1-$celled stage.
  • ✓
    $2-$celled stage.
  • C
    $3-$celled stage.
  • D
    Male gamete formation stage.
Answer
Correct option: B.
$2-$celled stage.
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MCQ 251 Mark
Which of the following is essential for conversion of pyruvic acid into acetyl $Co-A$?
  • A
    $\text{LAA}$
  • B
    $\text{NAD+}$
  • C
    $\text{TPP}$
  • ✓
    All of these.
Answer
Correct option: D.
All of these.
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MCQ 261 Mark
Incomplete oxidation of glucose into pyruvic acid with several intermediate steps is known as:
  • ✓
    Glycolysis.
  • B
    Krebs cycle.
  • C
    $\text{TCA}-$pathway.
  • D
    $\text{HMS}-$pathway.
Answer
Correct option: A.
Glycolysis.
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MCQ 271 Mark
Match the following and choose the correct option from those given below.
  Column $I$   Column $II$
$A.$ Molecular oxygen. $i$ $\alpha $ Ketoglutaric acid.
$B.$ Electron acceptor. $ii$ hydrogen acceptor.
$C.$ Pyruvate dehydrogenase. $iii$ cytochrome $C$.
$D.$ Decarboxylation. $iv$ acetyl $Co A.$
  • ✓
    $\text{A-ii, B-iii, C-iv, D-i.}$
  • B
    $\text{A-iii, B-iv, C-ii, D-i.}$
  • C
    $\text{A-ii, B-i, C-iii, D-iv.}$
  • D
    $\text{A-iv, B-iii, C-i, D-ii}$.
Answer
Correct option: A.
$\text{A-ii, B-iii, C-iv, D-i.}$
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MCQ 281 Mark
Which enzyme catalyses the reaction below? Pyruvic acid $\rightarrow$ Carbon dioxide $+$ Ethanol
  • A
    Pyruvic acid decarboxylase.
  • B
    Alcohol dehydrogenase.
  • C
    None of these.
  • ✓
    Both of these.
Answer
Correct option: D.
Both of these.
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MCQ 291 Mark
When one glucose molecule is completely oxidised, it changes.
  • A
    $\text{36 ADP}$ molecules into $\text{36 ATP}$ molecules.
  • ✓
    $\text{38 ADP}$ molecules into $\text{38 ATP}$ molecules.
  • C
    $\text{30 ADP}$ molecules into $\text{30 ATP} $ molecules.
  • D
    $\text{32 ADP}$ molecules into $\text{32 ATP}$ molecules.
Answer
Correct option: B.
$\text{38 ADP}$ molecules into $\text{38 ATP}$ molecules.
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MCQ 301 Mark
Harden and Young's ester is formed during glycolysis from:
  • ✓
    Fructose $1, 6-$bisphosphate
  • B
    Glucose$-6-$phosphate
  • C
    Glucose $1, 6-$bisphosphate
  • D
    fructose $6-$phosphate
Answer
Correct option: A.
Fructose $1, 6-$bisphosphate
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MCQ 311 Mark
Which of the following is a biological uncoupler of oxidative phosphorylation?
  • ✓
    Thermogenin.
  • B
    $2, 4-$Dichlorophenoxy acetic acid.
  • C
    $2, 4-$Dinitrophenol.
  • D
    Ethylene diaminotetra acetic acid.
Answer
Correct option: A.
Thermogenin.
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MCQ 321 Mark
In alcoholic fermentation.
  • A
    Oxygen is the electron acceptor.
  • ✓
    Triose phosphate is the electron donor while acetaldehyde is the electron acceptor.
  • C
    Triose phosphate is the electron donor while pyruvic acid is the electron acceptor.
  • D
    There is no electron donor.
Answer
Correct option: B.
Triose phosphate is the electron donor while acetaldehyde is the electron acceptor.
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MCQ 331 Mark
Anaerobic respiration normally occurs in:
  • A
    Grass
  • B
    Cactus
  • C
    Coconut
  • ✓
    Bakers' yeast
Answer
Correct option: D.
Bakers' yeast
Anaerobic respiration is carried out in the absence of oxygen and is also known as fermentation.
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MCQ 341 Mark
How many $\text{ATP}$ molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to $\ce{CO_2}$ and $\ce{H_2O}$ yields $686$ kcal and the useful chemical energy available in the high energy phosphate bond of one mole of  $\text{ATP}$ is $12$ kcal?
  • A
    $30$
  • ✓
    $57$
  • C
    $1$
  • D
    $2$
Answer
Correct option: B.
$57$
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MCQ 351 Mark
Out of $38 \ \text{ATP}$ molecules produced per glucose$,32 \ \text{ATP}$ molecules are formed from $\text{NADH/ FADH}$ in:
  • ✓
    Respiratory chain.
  • B
    Krebs cycle.
  • C
    Oxidative decarboxylation.
  • D
    $\text{EMP}.$
Answer
Correct option: A.
Respiratory chain.
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MCQ 361 Mark
How many molecules of $\text{ATP}$ is made during fermentation of one molecule of glucose?
  • A
    $4$
  • B
    $3$
  • ✓
    $2$
  • D
    $1$
Answer
Correct option: C.
$2$
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MCQ 371 Mark
In aerobic respiration, first $CO_2$​ is liberated during:
  • ✓
    Oxidation of pyruvate
  • B
    Decarboxylation of oxalosuccinate
  • C
    Decarboxylation of $\alpha -$ketoglutarate
  • D
    Alcoholic fermentation
Answer
Correct option: A.
Oxidation of pyruvate
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MCQ 381 Mark
In $\text{EMP}$ pathway, one molecule of fructose $1, 6$ bisphosphate splits into:
  • A
    Two molecules of phosphoglycerate.
  • B
    Two molecules of pyruvate.
  • ✓
    One molecule of phosphoglyceraldehyde and one of dihydroxy acetone phosphate.
  • D
    Two molecules of dihydroxy acetone phosphate.
Answer
Correct option: C.
One molecule of phosphoglyceraldehyde and one of dihydroxy acetone phosphate.
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MCQ 391 Mark
End product of glycolysis is:
  • A
    Acetyl Coenzyme $A.$
  • B
    $\text{PEP}$
  • ✓
    Pyruvate.
  • D
    $\text{OAA}$
Answer
Correct option: C.
Pyruvate.
The end product of glycolysis is pyruvate.
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MCQ 401 Mark
Excess $\text{ATP}$ inhibits respiration by inhibiting one of the following enzymes:
  • ✓
    Phosphofructokinase
  • B
    Hexokinase
  • C
    Pyruvic decarboxylase
  • D
    Aldolase
Answer
Correct option: A.
Phosphofructokinase
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MCQ 411 Mark
Electron Transport System $\text{(ETS)}$ is located in mitochondrial:
  • A
    Outer membrane.
  • B
    Inter membrane space.
  • ✓
    Inner membrane.
  • D
    Matrix.
Answer
Correct option: C.
Inner membrane.
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MCQ 421 Mark
A mutant cell lacking mitochondria will show.
  • A
    Inability to synthesize glucose.
  • B
    Inability to oxidize fats.
  • ✓
    Inability to oxidize carbohydrates and fats.
  • D
    Inability to oxidize carbohydrates.
Answer
Correct option: C.
Inability to oxidize carbohydrates and fats.
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MCQ 431 Mark
The mechanism of $\text{ATP}$ formation both in chloroplast and mitochondria is explained by:
  • A
    Relay pump theory of Godlewski.
  • B
    Munch’s pressure$/$mass flow model.
  • ✓
    Chemiosmotic theory of Mitchell.
  • D
    Cholondy$-$Went’s model.
Answer
Correct option: C.
Chemiosmotic theory of Mitchell.
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MCQ 441 Mark
Alternate name for Krebs cycle is:
  • A
    Glyoxylate cycle.
  • B
    Glycolate cycle.
  • ✓
    Citric acid cycle.
  • D
    $\text{EMP}$ pathway.
Answer
Correct option: C.
Citric acid cycle.
The Krebs cycle occurs in the mitochondrial matrix and as the first stable product of Krebs cycle is citric acid, it is also called as the citric acid cycle.
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MCQ 451 Mark
In Krebs cycle $\text{FAD}$ participates as electron acceptor during the conversion of:
  • A
    Succinyl $\ce{Co-A}$ to succinic acid.
  • B
    $A-$ketoglutarate to succinyl $\ce{Co-A}.$
  • ✓
    Succinic acid to fumaric acid.
  • D
    Fumaric acid to malic acid.
Answer
Correct option: C.
Succinic acid to fumaric acid.
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MCQ 461 Mark
One of the following is common to glycolysis as well as Krebs cycle in eukaryotes.
  • ✓
    Substrate level phosphorylation.
  • B
    Photophosphorylation.
  • C
    Localization in mitochondria.
  • D
    None of these.
Answer
Correct option: A.
Substrate level phosphorylation.
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MCQ 471 Mark
The most common respiratory substrate is:
  • ✓
    Glucose
  • B
    Sucrose
  • C
    Maltose
  • D
    Glycogen
Answer
Correct option: A.
Glucose
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MCQ 491 Mark
In carbon dioxide reduction$, \text{ATP}$ is:
  • ✓
    Used
  • B
    Unused
  • C
    May be used or not used
  • D
    None of the above
Answer
Correct option: A.
Used
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MCQ 501 Mark
In which of the following, respiration takes place in absence of oxygen?
  • A
    Man
  • B
    Potato
  • ✓
    Yeast
  • D
    Spirogyra
Answer
Correct option: C.
Yeast
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