RESPIRATION IN PLANTS Q BANK
RESPIRATION IN PLANTS Q BANK Question and answer based on strictly latest NCERT based pattern, and previous year NEET (AIPMT) question. chapter wise approach mcq is more useful for quick revision and increase speed for maintaining time period.
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MCQ:-
Q1) Which statement is wrong for Kreb’s cycle? (NEET 2017)
There are three points in the cycle where NAD⁺ is reduced to NADH + H⁺
There is one point in the cycle where FAD⁺ is reduced to FADH₂
During conversion of succinyl Co-A to succinic acid, a molecule of GTP is synthesised
The cycle starts with condensation of acetyl group (acetyl Co-A) with pyruvic acid to yield citric acid
Answer- The cycle starts with condensation of acetyl group (acety Co-A) with pyruvic acid to yield citric acid
Q2) Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates & proteins? (NEET 2016,PHASE II)
Glucose-6-phosphate
Fructose 1,6-biphosphate
Pyruvic acid
Acetyl Co-A
Answer- Acetyl Co-A
Q3) Oxidative phosphorylation is (NEET 2016,PHASE II)
Formation of ATP by transfer of phosphate group from a substrate to ADP
Oxidation of phosphate group in ATP
Addition of phosphate group to ATP
Formation of ATP by energy released from electrons removed during susbstrate oxidation
Answer- Formation of ATP by transfer of phosphate group from a substrate to ADP
Q4) In which one of the following processes CO₂ is not released? (CBSE AIPMT 2014)
Aerobic respiration in plants
Aerobic respiration in animals
Alcoholic fermentation
Lactate fermentation
Answer- Lactate fermentation
Q5) The three boxes in this diagram represent the three major biosynthetic pathways in aerobic respiration. Arrows represent net reactants or products (NEET 2013)
NADH
ATP
H₂O
FAD⁺ or FADH₂
Answer- ATP
Q6) Which of the metabolities is common to respiration mediated breakdown of fats, carbohydrates & proteins? (NEET 2013)
Glucose-6-phosphate
Fructose 1,6-biphosphate
Pyruvic acid
Acetyl Co-A
Answer- Acetyl Co-A
Q7) The energy-releasing metabolic process in which substrate is oxidised without an external electron acceptor is called (CBSE AIPMT 2010, 08)
Glycolysis
Fermentation
Aerobic respiration
Photorespiration
Answer- Fermentation
Q8) Aerobic respiratory pathway is appropriately termed (CBSE AIPMT 2009)
Catabolic
Parabolic
Amphibolic
Anabolic
Answer- Amphibolic
Q9) The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that Adenosine Triphosphate (ATP) is formed because (CBSE AIPMT 2008)
High energy bonds are formed in mitochondrial proteins
ADP is pumped out of the matrix into the intermembrane space
A proton gradient forms across the inner membrane
There is a change in the permeability of the inner mitochondrial membrane toward Adenosine Diphosphate (ADP)
Answer- A proton gradient forms across the inner membrane
Q10) The overall goal of glycolyis, Kreb’s cycle & the electron transport system is the formation of (CBSE AIPMT 2007)
ATP in small stepwise units
ATP in one large oxidation reaction
Sugars
Nucleic acids
Answer- ATP in small stepwise units
Q11) All enzymes of TCA cyle are located in the mitochondrial matrix except one which is located in inner mitochondrial membranes in eukaryotes & in cytosol in prokaryotes. This enzyme is (CBSE AIPMT 2007)
Lactate dehydrogenase
Isocitrate dehydrogenase
Malate dehydrogenase
Succinate dehydrogenase
Answer- Succinate dehydrogenase
Q12) How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to CO₂ & H₂O yields 686kcal & the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal? (CBSE AIPMT 2006)
30
57
1
2
ANSWER;—-
Q13) During which stage, in the complete oxidation of glucose are the greatest number of ATP molecules formed from ADP (CBSE AIPMT 2005)
Glycolysis
Kreb’s cycle
Conversion of pyruvic acid to acetyl Co-A
Electron transport chain
Answer- Electron transport chain
Q14) Chemiosmotic theory of ATP synthesis in the chloroplast & mitochondria is based on (CBSE AIPMT 2005)
Membrane potential
Accumulation of Na⁺ ions
Accumulation of K⁺ ions
Proton gradient
Answer- Proton gradient
Q15) In glycolysis, during oxidation electrons are removed by (CBSE AIPMT 2004)
ATP
Glyceraldehyde-3-phosphate
NAD⁺
Molecular oxygen
Answer- NAD⁺
Q16) In alcoholic fermentation (CBSE AIPMT 2003)
Oxygen is the electron acceptor
Triose phosphate is the electron donor while acetaldehyde is the electron acceptor
Triose phosphate is the electron donor while pyruvic acid is the electron acceptor
There is no electron donor
Answer- Triose phosphate is the electron donor while acetaldehyde is the electron acceptor
Q17) Which one of the following concerns photophosphorylation? (CBSE AIPMT 2003)
Answer- ADP + Inorganic PO₄→ATP
Q18) In which one of the following do the two names refer to one & the same thing? (CBSE AIPMT 2003)
Tricarboxylic & cycle & urea cycle
Krebs’ cycle & Calvin cyle
Tricarboxylic acid cycle & citric acid cycle
Citric acid cycle & Calvin cycle
Answer- Tricarboxylic acid cycle & citric acid cycle
Q19) How many ATP molecules are produced by aerobic oxidation of one molecule of glucose? (CBSE AIPMT 2002)
2
4
38
34
Answer- 38
Q20) Net gain of ATP molecules during aerobic respiration is (CBSE AIPMT 1999)
36 molecules
38 molecules
40 molecules
48 molecules
Answer- 38 molecules
Q21) The mechanism of ATP formation both in chloroplast & mitochondria is explained by (CBSE AIPMT 1997)
Relay pump theory of Godlewski
Munch’s pressure/mass flow model
Chemiosmotic theory of Mitchell
Cholondy-Went’s model
Answer- Chemiosmotic theory of Mitchell
Q22) In Kreb’s cycle FAD participates as electron acceptor during the conversion of (CBSE AIPMT 1997)
Succinyl Co-A to succinic acid
α-ketoglutarate to succinyl Co-A
Succinic acid to fumaric acid
Fumaric acid to malic acid
Answer- Succinic acid to fumaric acid
Q23) Oxidative phosphorylation involves simultaneous oxidation & phosphorylation to finally form (CBSE AIPMT 1996)
Pyruvate
NADP
DPN
ATP
Answer- ATP
Q24) Krebs’ cycle occurs in (CBSE AIPMT 1996)
Mitochondria
Cytoplasm
Chloroplast
Ribosomes
Answer- Mitochondria
Q25) Fermentation is anaerobic production of (CBSE AIPMT 1996)
Protein & acetic acid
Alcohol, lactic acid or similar compounds
ethers & acetones
alcohol & lipoproteins
Answer- Alcohol, lactic acid or similar compounds
Q26) Which of the following is essential for conversion of pyruvic acid into acetyl Co-A? (CBSE AIPMT 1995)
LAA
NAD⁺
TPP
All of these
Answer- All of these
Q27) Respiratory quotient (RQ) for fatty acid is (CBSE AIPMT 1995)
>1
<1
1
0
Answer- <1
Q28) In animal cells, the first stage of glucose breakdown is (CBSE AIPMT 1994)
Krebs’ cycle
Glycolysis
Oxidative phosphorylation
ETC
Answer- Glycolysis
Q29) Fermentation products of yeast are (CBSE AIPMT 1994)
H₂O + CO₂
Methyl alcohol + CO₂
Methyl alcohol + H₂O
Ethyl alcohol + CO₂
Answer- Ethyl alcohol + CO₂
Q30) Respiratory substrate yielding maximum number of ATP molecule is (CBSE AIPMT 1994)
Ketogenic amino acids
Glucose
Amylase
Glycogen
Answer- Glucose
Q31) ATP is injected in cyanide poisoning because it is (CBSE AIPMT 1994)
Necessary for cellular functions
Necessary for Na⁺ – K⁺ pump
Na⁺ – K⁺ pump operates at the cell membranes
ATP breaks down cyanide
Answer- Necessary for cellular functions
Q32) Maximum amount of energy/ATP is liberated on oxidation of (CBSE AIPMT 1994)
Fats
Proteins
Starch
Vitamins
Answer- Fats
Q33) Life without air would be (CBSE AIPMT 1993)
Reductional
Free from oxidative damage
Impossible
Anaerobic
Answer- Anaerobic
Q34) End product of citric acid/Krebs’ cycle is (CBSE AIPMT 1993)
Citric acid
Lactic acid
Pyruvic acid
CO₂ + H₂O
Answer- CO₂ + H₂O
Q35) Out of 38 ATP molecules produced per glucose, 32 ATP molecules are formed from NADH/FADH₂ in (CBSE AIPMT 1993)
Respiratory chain
Krebs’ cycle
Oxidative decarboxylation
EMP
Q36) End products of aerobic respiration are (CBSE AIPMT 1992)
Sugar & oxygen
Water & energy
Carbon dioxide, water & energy
Carbondioxide & energy
Answer- carbon dioxide, water & energy
Q37) Link between glycolysis, Krebs’ cycle & β-oxidation of fatty acid or carbohydrate & fat metabolism is (CBSE AIPMT 1992,90)
Oxaloacetic acid
Succinic acid
Citric acid
Acetyl Co-A
Answer- Acetyl Co-A
Q38) At a temperature above 35°C (CBSE AIPMT 1992)
Rate of photosynthesis will decline earlier than that of respiration
Rate of respiration will decline earlier than that of photosynthesis
There is no fixed pattern
Both decline simultaneously
Answer- Rate of photosynthesis will decline earlier than that of respiration
Q39) Oxidative phosphorylation is production of (CBSE AIPMT 1992)
ATP in photosynthesis
NADPH in photosynthesis
ATP in respiration
NADH in respiration
Answer- ATP in reapiration
Q40) Apparatus to measure rate of respiration & RQ is (CBSE AIPMT 1992)
Auxanometer
Photometer
Respirometer
Manometer
Answer- Respirometer
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