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MCQ for Full Syllabus Biology Respiration
Full Syllabus Biology students should refer to the following multiple-choice questions with answers for Respiration in Full Syllabus.
Respiration MCQ Questions Full Syllabus Biology with Answers
IMPORTANT POINTS
• Important of Respiration in living organisms.
The breakdown of C-C bonds of complex compounds through oxidation with in cell releasing considerable amount of energy is called respiration.
• Glycolysis : The breakdown of glucose to pyruyic acid is called glycolysis. This process occurs in the cytoplasm of cells.
• There are three major ways in which different cell handle pyruyic acid these are lactic acid fermentation, alcoholic fermentation and aerobic respiration.
• Aerobic respiration includes krebs cycle and oxidative phosphorylation in addition to glycolysis.
• All reaction of krebs cycle are carried out in the matrix of mitochondria and ETS (oxidative phosphorylation) carried out on inner membrance of mitochondria.
• Respiratory pathway is involved in both anabolic and catabolic processes and hence it is also known as an amphibolic pathway rather then as a catabolic one.
• During aerobic respiration O2 is consumed and CO2 is released. The ratio of CO2 to the O2 consumed during respiration is called Respiratory Quotient (RQ)
For the given options select the correct options (a, b, c, d) each carries one mark.
Question. Respiration is
(a) Anabolic process
(b) Catabolic process
(b) Catabolic process
(c) Both a and b
(d) Endothermic process.
(d) Endothermic process.
Answer: B
Question. Metabolism involves
(a) Anabolic process
(b) Catabolic process
(b) Catabolic process
(c) Both a and b
(d) Only redox process
(d) Only redox process
Answer: C
Question. Organisms obtain energy through
(a) Reproduction
(b) Excretion
(c) Respiration
(d) Digestion
(b) Excretion
(c) Respiration
(d) Digestion
Answer: C
Question. Respirations is a
(a) Endepgonic process
(b) Exergonic process
(b) Exergonic process
(c) Both A and B
(d) Neutralisation reaction
(d) Neutralisation reaction
Answer: B
Question. During respiration the food is
(a) Oxidised
(b) Reduced
(b) Reduced
(c) Both oxidised and reduced
(d) Neither oxidised nor reduced
(d) Neither oxidised nor reduced
Answer: A
Question. Which of the following is a main respiratory substrate in animals
(a) Fructose
(b) Starch
(c) Glucose
(d) Proteins
(b) Starch
(c) Glucose
(d) Proteins
Answer: C
Question. During the formation of ATP from ADP, which is released
(a) Water
(b) Oxygen
(c) Both A and B
(d) Energy
(b) Oxygen
(c) Both A and B
(d) Energy
Answer: A
Question. Respiration is found in
(a) Bacteria
(b) Prokaryotes
(c) Only animals
(d) All these
(b) Prokaryotes
(c) Only animals
(d) All these
Answer: D
Question. Respiratory substrate is completely oxidised in
(a) Aerobic respiration
(b) Anaerobic’ respiration.
(b) Anaerobic’ respiration.
(c) Both A and B
(d) Fermentation
(d) Fermentation
Answer: A
Question. In which of the following types of respiration, the amount of energy released is comparatively more
(a) Aerobic respiration
(b) Anaerobic respiration
(b) Anaerobic respiration
(c) Equal energy is released in both A and B
(d) None of these in correct
(d) None of these in correct
Answer: A
Question. Fermentation occurs in the
(a) Presence of oxygen
(b) Presence of water
(b) Presence of water
(c) Absence of oxygen
(d) Mitochondria
(d) Mitochondria
Answer: C
Question. First stage in respiration is
(a) Glycolysis
(b) Krebs cycle
(c) ETS
(d) Glycogenesis
(b) Krebs cycle
(c) ETS
(d) Glycogenesis
Answer: A
Question. Glucose is converted to pyruvic acid in
(a) Krebs cycle
(b) C4 cycle
(c) C3 cycle
(d) Glycolysis.
(b) C4 cycle
(c) C3 cycle
(d) Glycolysis.
Answer: D
Question. Number of pyruvic acid molecules formed in glycolysis is
(a)1
(b) 2
(c) 3
(d) 6
(b) 2
(c) 3
(d) 6
Answer: B
Question. Number of carbons present in a pyruvic acid t molecule is
(a) 2
(b) 3
(c) 4
(d) 6
(b) 3
(c) 4
(d) 6
Answer: B
Question. Glycolysis occurs in
(a) Cytoplasm
(b) Mitochondria
(c) Chloroplast
(d) Golgi complex
(b) Mitochondria
(c) Chloroplast
(d) Golgi complex
Answer: A
Question. Number of oxygen molecules used in glycolysis
(a) 12
(b) 4
(c) 6
(d) 0
(b) 4
(c) 6
(d) 0
Answer: D
Question. Number of CO2 molecules produced in glycolysis is
(a) 2
(b) 3
(c) 4
(d) 0
(b) 3
(c) 4
(d) 0
Answer: D
Question. In respiration, final acceptor of protons is :
(a) Oxygen
(b) NAD+
(c) FAD
(d) UQ
(b) NAD+
(c) FAD
(d) UQ
Answer: A
Question. Which is not formed during anaerobic respiration ?
(a) Pyruvate
(b) Ethyl alcohol
(c) Acetyl CoA
(d) CO2
(b) Ethyl alcohol
(c) Acetyl CoA
(d) CO2
Answer: C
Question. ADP combines with inorganic phosphate (Pi) to give
(a) ATP
(b) AMK
(c) GDP
(d) GTP
(b) AMK
(c) GDP
(d) GTP
Answer: A
Question. Dihydroxy acetone phosphate is a
(a) 2 C compound
(b) 3 C compound
(c) 4 C compound
(d) 6 C compound
(b) 3 C compound
(c) 4 C compound
(d) 6 C compound
Answer: B
Question. Number of ATPs consumed in glycolysis are
(a) 2
(b) 4
(c) 6
(d) 8
(b) 4
(c) 6
(d) 8
Answer: A
Question. Substrate in glycolysis is normally
(a) Fructose
(b) Glucose
(b) Glucose
(c) Pyruvic acid
(d) Phosphoglyceric acid
(d) Phosphoglyceric acid
Answer: B
Question. Decarboxylation of pyruvic acid results in the formation of
(a) Water
(b) Acetyl CoA
(c) Glucose
(d) PGA.
(b) Acetyl CoA
(c) Glucose
(d) PGA.
Answer: B
Question. Number of direct ATPs produced in glycolysis is
(a) 2
(b) 4
(c) 6
(d) 1
(b) 4
(c) 6
(d) 1
Answer: B
Question. Number of reduced coenzymes NADH produced during glycolysis are
(a) 1
(b) 2
(c) 4
(d) 6
(b) 2
(c) 4
(d) 6
Answer: B
Question. Net gain of glycolysis is
(a) 3 ATP and 1 NADH + H+
(b) 2 ATP and 2 NADH + H+
(b) 2 ATP and 2 NADH + H+
(c) 6 ATP and 4 NADH + H+
(d) 10 ATP and 6 NADH + H+
(d) 10 ATP and 6 NADH + H+
Answer: B
Question. In respiration, the oxygen is used in
(a) Glycolysis
(b) Krebs cycle
(c) ETS
(d) Fermentation
(b) Krebs cycle
(c) ETS
(d) Fermentation
Answer: C
Question. One molecules of NADH+ H + gives how many ATPs in ETS
(a) 2 ATP
(b) 3 ATP
(c) 4 ATP
(d) 6 ATP
(b) 3 ATP
(c) 4 ATP
(d) 6 ATP
Answer: B
Question. Conversion of pyruvic acid to acetyl Co A is called
(a) Glycolysis
(b) Fermentation
(b) Fermentation
(c) ETS
(d) Oxidative decarboxylation
(d) Oxidative decarboxylation
Answer: D
Question. Reduction of acetaldehyde gives
(a) Methyl alcohol
(b) Ethyl alcohol
(c) Glycerol
(d) All these
(b) Ethyl alcohol
(c) Glycerol
(d) All these
Answer: B
Question. Lactic acid is formed due to the reduction of
(a) Pyruvic acid
(b) Acetaldehyde
(c) Malic acid
(d) Acetyl CoA
(b) Acetaldehyde
(c) Malic acid
(d) Acetyl CoA
Answer: A
Question. Fermentation is the primary mode of energy production in
(a) Higher plants
(b) Animals
(c) Yeast
(d) Algae.
(b) Animals
(c) Yeast
(d) Algae.
Answer: C
Question. Krebs cycle occurs in
(a) Cytoplasmic matrix
(b) Mitochondrial matrix
(b) Mitochondrial matrix
(c) F1 particles
(d) All these
(d) All these
Answer: B
Question. Krebs cycle is also known as
(a) Citric acid cycle
(b) TCA cycle
(c) Both a and b
(d) Calvin cycle
(b) TCA cycle
(c) Both a and b
(d) Calvin cycle
Answer: C
Question. The location of ETS is ;
(a) Mitochondria! matrix
(b) Cytoplasm
(b) Cytoplasm
(c) Outer mitochondrial membranes
(d) Inner mitochondrial membrane
(d) Inner mitochondrial membrane
Answer: D
Question. Krebs cycle starts with the condensation of acetyl CoA with
(a) Pyruvic aicd
(b) Oxalo-acetic acid
(c) Malic acid
(d) Citric acid
(b) Oxalo-acetic acid
(c) Malic acid
(d) Citric acid
Answer: B
Question. α - keto glutaric acid consists of
(a) 3 carbons
(b) 4 carbons
(c) 5 carbons
(d) 6 carbons
(b) 4 carbons
(c) 5 carbons
(d) 6 carbons
Answer: C
Question. Citric acid cycle was proposed by
(a) Krebs
(b) Calvin
(c) Mendel
(d) Lavosier
(b) Calvin
(c) Mendel
(d) Lavosier
Answer: A
Question. Direct synthesis of ATPs in one turn of Krebs cycle is
(a) l
(b) 2
(c) 3
(d) 4
(b) 2
(c) 3
(d) 4
Answer: A
Question. Number of NADH + H+, formed in one turn of Krebs cycle is
(a) 2
(b) 4
(c) 6
(d) 5
(b) 4
(c) 6
(d) 5
Answer: B
Question. Number of FADH2 formed in one turn of Krebs cycle is
(a) l
(b) 2
(c) 3
(d) 4
(b) 2
(c) 3
(d) 4
Answer: A
Question. Number of ATPs which can be generated by one FADH2 in ETS are
(a) l
(b) 2
(c) 3
(d) 4
(b) 2
(c) 3
(d) 4
Answer: B
Question. Formation of ATPs in mitochondria is known as
(a) Oxidative phosphorylation
(b) Cyclic photophosphorylation
(b) Cyclic photophosphorylation
(c) Noncyclic photophosphorylatian
(d) Fermentation
(d) Fermentation
Answer: A
Question. Formation of ATP occurs
(a) In outer mitochondrial membrane
(b) On F1 particles
(b) On F1 particles
(c) Mitochondrial matrix
(d) In mitochondrial DNA
(d) In mitochondrial DNA
Answer: B
Question. Phosphorylation means
(a) Formation of reduced coenzymes
(b) Formation of PGA
(b) Formation of PGA
(c) Formation of ATP
(d) Breakdown of ATP
(d) Breakdown of ATP
Answer: C
Question. Oxidative phosphorylation occurs in
(a) Mitochondria
(b) Chloroplast
(c) Cytoplasm
(d) Golgi bodies
(b) Chloroplast
(c) Cytoplasm
(d) Golgi bodies
Answer: A
Question. The metal ion present in cytochromes is
(a) Copper
(b) Iron
(c) Magnesium
(d) Zinc
(b) Iron
(c) Magnesium
(d) Zinc
Answer: B
Question. CO2 release occurs in
(a) Photosynthesis
(b) Respiration
(c) Transpiration
(d) Guttation
(b) Respiration
(c) Transpiration
(d) Guttation
Answer: B
Question. R.Q. stands for
(a) Reduction quotient
(b) Respiratory quotient
(c) Reverse quotient
(d) None of these
(b) Respiratory quotient
(c) Reverse quotient
(d) None of these
Answer: B
Question. R.Q. of carbohydrates is
(a) l
(b) 2
(c) 3
(d) 4
(b) 2
(c) 3
(d) 4
Answer: A
Question. R.Q. of anaerobic respiration is
(a) Zero
(b) Infinity
(c) Less than one
(d) More than one
(b) Infinity
(c) Less than one
(d) More than one
Answer: B
Question. When amount of CO2 taken from atmosphere (in photosynthesis) becomes equal to the amount of CO2 released in atmosphere (in respiration), this is called
(a) Final point
(b) Compensation point
(b) Compensation point
(c) Balance point
(d) Equal distribution
(d) Equal distribution
Answer: B
Question. Alternative pathway for respiration is
(a) Photorespiration
(b) Pentose phosphate pathway
(b) Pentose phosphate pathway
(c) C3 cycle
(d) C4 cycle
(d) C4 cycle
Answer: B
Question. Which of the following processes is common for aerobic and anaerobic respiration
(a) Glycolysis
(b) Krebs cycle
(c) ETS
(d) None of these
(b) Krebs cycle
(c) ETS
(d) None of these
Answer: A
Question. Anaerobic respiration is also called
(a) Fermentation
(b) PPP pathway
(c) Glycolysis
(d) Krebs cycle
(b) PPP pathway
(c) Glycolysis
(d) Krebs cycle
Answer: A
Question. How many ATP are formed during dephosphorylation in glycolysis ?
(a) 2ATP
(b) 4ATP
(c) 3 ATP
(d) 6ATP
(b) 4ATP
(c) 3 ATP
(d) 6ATP
Answer: B
Question. R.Q. of oxalic acid is
(a) Infinity
(b) 4
(c) 0.7
(d) 1
(b) 4
(c) 0.7
(d) 1
Answer: B
Question. Which process occurs in cytosol ?
(a) Photosynthesis
(b) Krebs cycle
(b) Krebs cycle
(c) Glycolysis
(d) Oxidative phosphorylation
(d) Oxidative phosphorylation
Answer: C
Question. Synthetic processes of a cell comes under
(a) Anabolism
(b) Metabolism
(c) Catabolism
(d) Growth
(b) Metabolism
(c) Catabolism
(d) Growth
Answer: A
Question. Degradation processes of a cell are referred under
(a) Anabolism
(b) Catabolism
(c) Metabolism
(d) Growth
(b) Catabolism
(c) Metabolism
(d) Growth
Answer: B
Question. Pyruvic acid is
(a) CH3COCOOH
(b) CH3CHO
(c) CH3CHOH COOH
(d) CH3CH2OH
(b) CH3CHO
(c) CH3CHOH COOH
(d) CH3CH2OH
Answer: A
Question. CH3CHO is
(a) Acetaldehyde
(b) Pyruvic acid
(c) Ethanol
(d) Lactic acid
(b) Pyruvic acid
(c) Ethanol
(d) Lactic acid
Answer: A
Question. CH3CH2OH represents
(a) Lactic acid
(b) Acetic acid
(c) Ethanol
(d) Pyruvic add
(b) Acetic acid
(c) Ethanol
(d) Pyruvic add
Answer: C
Question. Respiratory substances are
(a) Substances available from air
(b) Nutritive substances present in food
(b) Nutritive substances present in food
(c) Mineral elements
(d) Excretory substances
(d) Excretory substances
Answer: B
Question. For aerobic respiration, it is essential
(a) O2
(b) CO2
(c) CO
(d) H2S
(b) CO2
(c) CO
(d) H2S
Answer: A
Question. Acetaldehyde is formed from pyruvic acid, if it is removed
(a) H2
(b) CHO
(c) 2 OH
(d) CO2
(b) CHO
(c) 2 OH
(d) CO2
Answer: D
Question. Respiration type occurring in human red blood corpuscles is
(a) Anaerobic
(b) Aerobic
(c) Both A and B
(d) Fermentation
(b) Aerobic
(c) Both A and B
(d) Fermentation
Answer: A
Question. Yeast
(a) Respires an aerobically, due to lack of mitochondria
(b) Respires aerobically, if it gets O2, otherwise perform alcoholic fermentation
(c) Respires aerobically
(d) Can perform alcoholic fermentation
Answer: B
Question. The end product of glycolysis of a glucose molecule is
(a) Pyruvic acid, NADH2 and ADP
(b) Pyruvic acid, 2H+, 2e and 4 ATP
(b) Pyruvic acid, 2H+, 2e and 4 ATP
(c) 2 Pyruvic acid, 2NADH2 and ATP
(d) 2 Pyruvic acid, NADH2 and 2 ATP
(d) 2 Pyruvic acid, NADH2 and 2 ATP
Answer: D
Question. The enzyme required to form acetaldehyde from pyruvic acid is
(a) Hexokinase
(b) Oxidase
(b) Oxidase
(c) Pyruvic acid decarboxylase
(d) Alcohol dehydrogenase
(d) Alcohol dehydrogenase
Answer: C
Question. Phosphorylation in general is ________
(a) Combination of phosphoric acid with a chemical
(b) Formation of PGA by adding P to glycerate
(c) Addition of ATP to glucose
(d) Synthesis ATP from ADP and P
Answer: A
Question. Fructose 1,6 biphosphate splits into
(a) PGAL and DHAP
(b) PGAL and PGA
(c) PGAL and BPGA
(d) PGA and BPGA.
(b) PGAL and PGA
(c) PGAL and BPGA
(d) PGA and BPGA.
Answer: A
Question. Oxidative phosphorylation occurs in
(a) Cytosol
(b) Cristae
(b) Cristae
(c) Mitochondrial matrix
(d) Endoplasmic reticulum,
(d) Endoplasmic reticulum,
Answer: B
Question. Malic acid is formed from fumaric acid
(a) By addition of CO2
(b) By addition of H2O
(c) By removal of H2O
(d) By removal of CO2
(b) By addition of H2O
(c) By removal of H2O
(d) By removal of CO2
Answer: B
Question. If CO2 and 2H are removed from pyruvic acid, it is formed
(a) Acetyl co-enzyme A
(b) Citric acid
(c) Acetate
(d) Co-A
(b) Citric acid
(c) Acetate
(d) Co-A
Answer: C
Question. It is by-product of Kreb’s cycle
(a) Oxaloacetic acid
(b) Citric acid
(c) Acetyl co-enzyme
(d) Acetate.
(b) Citric acid
(c) Acetyl co-enzyme
(d) Acetate.
Answer: B
Question. One ATP is formed when
(a) Succinic acid → Fumaric acid
(b) α -ketoglutaric acid → Succinyl CoA
(b) α -ketoglutaric acid → Succinyl CoA
(c) Succinyl CoA → Succinic acid
(d) Fumaric acid → Malic acid.
(d) Fumaric acid → Malic acid.
Answer: C
Question. Respiratory quotient and compensation point are
(a) Not related
(b) Inverse to each other
(b) Inverse to each other
(c) Same
(d) Applicable to.all organisms.
(d) Applicable to.all organisms.
Answer: A
Question. RQ = l, is
(a) The multiplication O2 consumed O2 and released CO2
(b) The amount of O2, consumed and CO2 released are the same
(c) One CO2 molecule more released than O2 molecule consumed
(d) One O2 molecule more consumed than CO2 molecules released
Answer: B
Question. If RQ is 0.7, the substance needs
(a) More O2 for respiration
(b) Less O2 for respiration
(c) O2 is not used for its respiration
(d) The substance has more oxygen in its constitution
Answer: A
Question. The site of occurrance of all reactions of PPP is
(a) Cytosol
(b) Mitochondrial matrix
(b) Mitochondrial matrix
(c) Cristae
(d) Thylakoid matrix
(d) Thylakoid matrix
Answer: A
Question. The process occurring during Kreb’s cycle is
(a) Decarboxylation and dehydrogenation
(b) Decarboxylation, dehydrogenation and phosphorylation
(c) Decarboxylation and phosphorylation
(d) Dehydrogenation and phosphorylation
Answer: B
Question. During glycolysis water is released from
(a) 2, Phospoglyceric acid
(b) Biphosphoglyceric acid
(b) Biphosphoglyceric acid
(c) Phosphoenol pyruvic acid
(d) Phosphoglyceraldehyde
(d) Phosphoglyceraldehyde
Answer: A
Question. When human muscle contracts :
(a) Respiration does not occur
(b) Anaerobic respiration occurs, if supply of oxygen is insufficient
(c) Anaerobic respiration never occurs
(d) Always anaerobic respiration occurs.
Answer: B
Question. The correct sequence of the three processes of aerobic respiration is
(a) Glycolysis, Kreb’s cycle, oxidative phosphorylation.
(b) Glycolysis, oxidative phosphorylation and Kreb’s cycle
(c) Kreb’s cycle, glycolysis and oxidative phosphorylation
(d) oxidative phosphorylation, Kreb’s cycle, glycolysis
Answer: A
Question. During PPP, RuBP is formed in
(a) Mitochondria
(b) Cytosol
(c) Stroma
(d) Chloroplas
(b) Cytosol
(c) Stroma
(d) Chloroplas
Answer: B
Question. The number of ATP molecules formed in oxidative phosphorylation of one glucose molecule
(a) 6
(b) 14
(c) 28
(d) 34
(b) 14
(c) 28
(d) 34
Answer: D
Question. The number of ATP molecules formed in oxidative phosphorylation of 1 pyruvic acid
(a) 6
(b)14
(c) 28
(d) 34
(b)14
(c) 28
(d) 34
Answer: B
Question. How much energy spent in transport of one pyruvic acid to mitochondrion ?
(a) Energy of 1 ATP
(b) No energy
(c) Energy of 2 ATP
(d) Not certain
(b) No energy
(c) Energy of 2 ATP
(d) Not certain
Answer: A
Question. In anaerobic respiration in plants
(a) Oxygen is absorbed
(b) Oxygen is released
(b) Oxygen is released
(c) Carbon dioxide is released
(d) Carbon dioxide is absorbed.
(d) Carbon dioxide is absorbed.
Answer: C
Question. Krebs cycle takes place in
(a) Vesicles of E.R
(b) Mitochondria
(c) Dictyosomes
(d) Chloroplasts.
(b) Mitochondria
(c) Dictyosomes
(d) Chloroplasts.
Answer: B
Question. By ETS, ATP-synthesis occurs on the
(a) Outer membrane of mitochondrion
(b) Inner membrane of mitochondrion
(b) Inner membrane of mitochondrion
(c) Matrix
(d) None of the above
(d) None of the above
Answer: B
Question. Energy currency (reservoir) of the cells is
(a) AMP
(b) ATP
(c) RNA
(d) DNA
(b) ATP
(c) RNA
(d) DNA
Answer: B
Question. Complete oxidation of glucose into pyruvic acid with several intermediate steps is known as
(a) TCA-pathway
(b) Glycolysis
(c) HMS-pathway
(d) Krebs cycle
(b) Glycolysis
(c) HMS-pathway
(d) Krebs cycle
Answer: B
Question. When a molecule of pyruvic acid is subjected to anaerobic oxidation and forms lactic acid, there is
(a) Loss of 3 ATP molecules
(b) Loss of 6 ATP molecules
(b) Loss of 6 ATP molecules
(c) Gain of 2 ATP molecules
(d) Gain of 4 ATP molecules
(d) Gain of 4 ATP molecules
Answer: A
Question. Conversion of pyruvic acid into ethyl alcohol is facilitated by the enzyme
(a) Decarboxylase
(b) Dehydrogenase
(b) Dehydrogenase
(c) Decarboxylase and dehydrogenase
(d) Phosphotase
(d) Phosphotase
Answer: C
Question. RQ for fatty substance/fat is
(a) Infinity
(b) Less than one
(c) Greater than one
(d) Zero
(b) Less than one
(c) Greater than one
(d) Zero
Answer: B
Question. RQ for glucose carbohydrate is
(a) 1
(b) 0.5
(c) 2
(d) 0.05
(b) 0.5
(c) 2
(d) 0.05
Answer: A
Question. An indispensable role in energy metabolism is played by
(a) Sodium
(b) Phosphorus
(c) Calcium
(d) Lithium
(b) Phosphorus
(c) Calcium
(d) Lithium
Answer: B
Question. Instantaneous source of energy is
(a) Glucose
(b) Fats
(c) Proteins
(d) Amino acid.
(b) Fats
(c) Proteins
(d) Amino acid.
Answer: A
Question. ATP equivalents produced during oxidation of succinate to fumarate for one glucose molecule is/are
(a) l
(b) 2
(c) 3
(d) 4
(b) 2
(c) 3
(d) 4
Answer: B
Question. Which of the following process is used in the conversion of pyruvate to acetyl CoA ?
(a) Oxidative decarboxylation
(b) Oxidative dehydrogenation
(b) Oxidative dehydrogenation
(c) Oxidative dehydration
(d) Oxidative phosphorylation
(d) Oxidative phosphorylation
Answer: A
Question. During ATP synthesis electrons pass through
(a) H2O
(b) Cytochromes
(c) CO2
(d) O2
(b) Cytochromes
(c) CO2
(d) O2
Answer: B
Question. Net gain of ATP in glycolysis _______
(a) 6
(b) 2
(c) 4
(d) 8
(b) 2
(c) 4
(d) 8
Answer: D
Question. The universal hydrogen acceptor is ‘
(a) NAD
(b)ATP
(c) CoA
(d) FMN
(b)ATP
(c) CoA
(d) FMN
Answer: A
Question. Both respiration and photosynthesis require
(a) Sunlight
(b) Chlorophyll
(c) Glucose
(d) Cytochromes
(b) Chlorophyll
(c) Glucose
(d) Cytochromes
Answer: D
Question. In an organism utilising carbohydrates as its source of energy anaerobically, the R.Q. is likely
(a) 0.7
(b) 0.9
(c) l.0
(d) Infinity.
(b) 0.9
(c) l.0
(d) Infinity.
Answer: D
Question. In plants energy is produced during the process of
(a) Photosynthesis
(b) Transpiration
(c) Respiration
(d) Water absorption
(b) Transpiration
(c) Respiration
(d) Water absorption
Answer: C
Question. In respiration pyruvic acid is
(a) Formed only when oxygen is available
(b) One of the products of Krebs cycle
(c) Broken down into a two carbon fragment and CO2
(d) A result of protlipid breakdown.
Answer: C
Question. Maximum number of ATP is synthcsised during oxidation of
(a) β - amino acid
(b) Malic acid
(c) Palmitic acid
(d) Glucose
(b) Malic acid
(c) Palmitic acid
(d) Glucose
Answer: C
Question. NADP+ is reduced to NADPH in
(a) HMP
(b) Calvin Cycle
(c) Glycolysis
(d) EMP
(b) Calvin Cycle
(c) Glycolysis
(d) EMP
Answer: A
Question. Incomplete breakdown of sugars in anaerobic respiration forms
(a) Fructose and water
(b) Glucose and CO2
(c) Alcohol and CO2
(d) Water and CO2
(b) Glucose and CO2
(c) Alcohol and CO2
(d) Water and CO2
Answer: C
Question. Which of the following is the source of respiration ?
(a) RNA
(b) DNA
(b) DNA
(c) ATP
(d) Stored food
(d) Stored food
Answer: D
Question. Raw material of respiration is
(a) Glucose and fructose
(b) Glucose and sucrose
(b) Glucose and sucrose
(c) Glucose + O2
(d) Glucose + CO2
(d) Glucose + CO2
Answer: C
Question. Respiration is found in
(a) In all living cells in light
(b) All living cells in dark
(b) All living cells in dark
(c) In all living cells both in light and dark
(d) Only in nongreen cells both in light and dark
(d) Only in nongreen cells both in light and dark
Answer: C
Question. Anaerobic respiration is
(a) Extramolecular respiration
(b) Molecular respiration
(b) Molecular respiration
(c) Inter-molecular respiration
(d) Intra-molecular respiration.
(d) Intra-molecular respiration.
Answer: D
Question. Total gain of energy in anaerobic respiration from one glucose molecule is
(a) Two ATP
(b) One ATP
(c) Four ATP
(d) Three ATP
(b) One ATP
(c) Four ATP
(d) Three ATP
Answer: A
Question. Final electron acceptor in respiration is
(a) Hydrogen
(b) Oxygen
(c) Cytochromes
(d) Dehydrogenases
(b) Oxygen
(c) Cytochromes
(d) Dehydrogenases
Answer: B
Question. Oxidative phosphorylation is found in
(a) Chloroplasts
(b) Leucoplasts
(c) Peroxisomes
(d) Mitochondria
(b) Leucoplasts
(c) Peroxisomes
(d) Mitochondria
Answer: D
Question. In Opunita and other succulents, night time R.Q. is
(a) One
(b) More than one
(c) Zero
(d) Less than one
(b) More than one
(c) Zero
(d) Less than one
Answer: C
Question. RQ of protein rich pulses is ‘
(a) Unity
(b) Infinity
(c) More than unity
(d) Less than one
(b) Infinity
(c) More than unity
(d) Less than one
Answer: D
Question. Oxidation of a molecule of acetyl CoA produces
(a) 12 ATP
(b) 15 ATP
(c) 6 ATP
(d) 19 ATP
(b) 15 ATP
(c) 6 ATP
(d) 19 ATP
Answer: A
Question. Maximum amount of energy/ATP is liberated on oxidation of
(a) Fats
(b) Proteins
(c) Starch
(d) Vitamins
(b) Proteins
(c) Starch
(d) Vitamins
Answer: A
126. R.Q. is ratio of ;
(a) CO2 produced to substrate consumed
(b) CO2 produced to O2 consumed
(c) Oxygen consumed to water produced
(d) Oxygen consumed to CO2 produced
Answer: B
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
(b) PEP
(c) Pyruvate
(d) Acetyl CoA
Answer: D
Question. Apparatus to measure rate of respiration and R.Q. is
(a) Auxanometer
(b) Potometer
(c) Respirometer
(d) Manometer
(b) Potometer
(c) Respirometer
(d) Manometer
Answer: C
Question. Terminal cytochrome of respiratory chain which donates electrons to oxygen is
(a) Cyt b
(b) Cyt c
(c) Cyt a
(d) Cyt a3
(b) Cyt c
(c) Cyt a
(d) Cyt a3
Answer: D
Question. R.Q. is maximum when respiratory substrate is
(a) Glucose
(b) Fat
(c) Protein
(d) Malic acid.
(b) Fat
(c) Protein
(d) Malic acid.
Answer: D
Question. End product of citric add/Krebs cycle is
(a) Citric acid
(b) Lactic acid
(c) Pyruvic acid
(d) CO2 + H2O
(b) Lactic acid
(c) Pyruvic acid
(d) CO2 + H2O
Answer: D
Question. Krebs cycle is
(a) Oxidation of glucose to alcohol and water
(b) Oxidation of acetyl CoA to carbon dioxide and water involving electron transport
(c) Complete oxidation of acetyl CoA without electron transport
(d) Complete reduction of acetyl CoA to carbon dioxide and water.
Answer: C
Question. Most of the biological energy is supplied by mitochondria through
(a) Breaking of proteins
(b) Reduction NADP+
(b) Reduction NADP+
(c) Breaking of sugars
(d) Oxidising TCA substrates.
(d) Oxidising TCA substrates.
Answer: D
Question. Which one is a product of glycolysis, besides 2 ATP ?
(a) FAD
(b) NADH
(c) NAD
(d) NADP
(b) NADH
(c) NAD
(d) NADP
Answer: B
Question. The site of Krebs cycle in bacteria is
(a) Nucleoid
(b) Cytoplasm
(c) Plasma membrane
(d) Ribosomes
(b) Cytoplasm
(c) Plasma membrane
(d) Ribosomes
Answer: C
Question. Which is the product of aerobic respiration?
(a) Malic acid
(b) Ethyl alcohol
(c) Lactic acid
(d) Pyruvic acid
(b) Ethyl alcohol
(c) Lactic acid
(d) Pyruvic acid
Answer: A
Question. Which one can respire in the absence of oxygen ?
(a) Seeds
(b) Leaves
(c) Stem
(d) Root
(b) Leaves
(c) Stem
(d) Root
Answer: A
Question. Lactic acid fermentation does not produce
(a) ATP
(b) CO2 and NADH
(c) CO2
(d) NADH
(b) CO2 and NADH
(c) CO2
(d) NADH
Answer: B
Question. Electron transport system of mitochondria is located in
(a) Outer membrane
(b) Inner membrane
(c) Inter-cristal space
(d) Outer chamber.
(b) Inner membrane
(c) Inter-cristal space
(d) Outer chamber.
Answer: B
Question. In bacteria the site for respiration is
(a) Cytoplasm
(b) Mesosome
(c) Episome
(d) Plasmid
(b) Mesosome
(c) Episome
(d) Plasmid
Answer: B
Question. Which is wrong about cytochrome P-450 ?
(a) Contains iron
(b) Is a coloured cell
(b) Is a coloured cell
(c) Is an enzyme
(d) Plays an important role in metabolism.
(d) Plays an important role in metabolism.
Answer: B
Question. Production of alcohol by Yeast fermentation is___ process
(a) Anaerobic
(b) Aerobic
(c) Light dependent
(d) Both A and C.
(b) Aerobic
(c) Light dependent
(d) Both A and C.
Answer: A
Question. In glycolysis, enzyme enolasc produces
(a) Phosphoglyceric acid
(b) Phosphoenol pyruvate
(b) Phosphoenol pyruvate
(c) Phosphoglyceraldehyde
(d) Pyruvate
(d) Pyruvate
Answer: B
Question. Oxygen is reduced to water in
(a) Fermentation
(b) Calvin cycle
(b) Calvin cycle
(c) Electron transport
(d) Krebs cycle
(d) Krebs cycle
(e) Glycolysis
Answer: C
Question. Cytochrome is
(a) Metalloflavoprotein
(b) Fe-containing porphyrin pigment
(b) Fe-containing porphyrin pigment
(c) Lipid
(d) Glycoprotein
(d) Glycoprotein
Answer: B
Question. Isocitric acid is changed to α -oxalosucinic acid by
(a) Oxidative carboxylation
(b) Oxidative decarboxylation
(b) Oxidative decarboxylation
(c) Dehydrogenation
(d) Hydrogenation and decarboxylation.
(d) Hydrogenation and decarboxylation.
Answer: B
Question. In respiration
(a) 2 PGAL are formed in glycolysis and none in Krebs cycle
(b) 6 PGAL in glycolysis, 3 PGAL in Krebs cycle
(c) 8 PGAL in glycolysis, 3 PGAL in Krebs cycle
(d) PGAL formation does not occur in respiration.
Answer: A
Question. Glycolysis takes place in
(a) All cells
(b) Only eukaryotic cells
(b) Only eukaryotic cells
(c) Muscle cells
(d) Nerve cells
(d) Nerve cells
Answer: A
Question. Which is rich in energy
(a) NAD+
(b) Mitochondria
(c) FAD
(d) ATP
(b) Mitochondria
(c) FAD
(d) ATP
Answer: D
Question. Which one requires oxygen
(a) Fermentation
(b) EMP pathway
(b) EMP pathway
(c) Pentose phosphate pathway
(d) None of the above
(d) None of the above
Answer: D
Question. Mechanism of aerobic respiration was discovered by
(a) Calvin
(b) Krebs
(c) Pasteur
(d) Hatch and Slack
(b) Krebs
(c) Pasteur
(d) Hatch and Slack
Answer: B
Question. Which of the following is the first step of glycolysis
(a) Conversion of glucose to fructose
(b) Dehydrogenation of glucose
(b) Dehydrogenation of glucose
(c) Breakdown of glucose
(d) Phosphorylation of glucose
(d) Phosphorylation of glucose
Answer: D
Question. How many ATP molecules are released when one molecule of glucose is oxidised in our liver cells
(a) 36
(b) 38
(c) 2
(d) 8
(b) 38
(c) 2
(d) 8
Answer: B
Question. RQ of anaerobic respiration is
(a) < 1
(b) 0
(c) 1
(d) >1
(b) 0
(c) 1
(d) >1
Answer: B
Question. Which one is an important intermediate formed in all types of respiration
(a) Acetyl CoA
(b) Oxaloacetate
(c) Pyruvic acid
(b) Oxaloacetate
(c) Pyruvic acid
(d) Tricarboxylic acid
Answer: C
Question. What is RQ of the reaction 2C51H98O6 + 145O2 –– 102CO2 + 98H2O.
(a) 0.7
(b) l.0
(c) l.45
(d) l.62
(b) l.0
(c) l.45
(d) l.62
Answer: A
Question. Single turn of citric acid cycle yields
(a) 2 FADH2, 2 NADH2, 2 ATP
(b) 1 FADH2, 2 NADH2, 1 ATP
(b) 1 FADH2, 2 NADH2, 1 ATP
(c) 1 FADH2, 4 NADH2, 1 ATP
(d) 1 FADH2, 1 NADH2, 1 ATP
(d) 1 FADH2, 1 NADH2, 1 ATP
(e) 1 FADH2,1 NADH2, 2 ATP.
Answer: C
Question. RQ is less than one, if the respiratory substrate is
(a) Organic acids
(b) Fats and proteins
(c) Sucrose
(d) Glucose
(b) Fats and proteins
(c) Sucrose
(d) Glucose
Answer: B
Question. Enzyme used in conversion of glucose to glucose 6-phosphate is
(a) Hexokinase
(b) Isomerase
(b) Isomerase
(c) Phosphokinase
(d) Phosphohexokinase
(d) Phosphohexokinase
Answer: A
Question. Identify the compound that links glycolysis and Krebs cycle
(a) Oxaloacctate
(b) Pyruvic acid
(c) Lactic acid
(d) Acetyl CoA
(b) Pyruvic acid
(c) Lactic acid
(d) Acetyl CoA
Answer: D
Question. F0 base of oxysome is towards :
(a) Outer chamber
(b) Matrix
(c) Inner chamber
(d) Both B and C
(b) Matrix
(c) Inner chamber
(d) Both B and C
Answer: A
Question. Muscle cells starved of oxygen and supplied with pyruvic acid will produce
(a) Ethanol
(b) Lactic acids
(c) CO2 only
(d) CO2 and H2O
(b) Lactic acids
(c) CO2 only
(d) CO2 and H2O
Answer: B
Question. Products of anaerobic respiration are
(a) Water and alcohol
(b) Water and oxygen
(c) Alcohol and CO2
(d) CO2 and water
(b) Water and oxygen
(c) Alcohol and CO2
(d) CO2 and water
Answer: C
Question. During which stage in the complete oxidation of glucose are the greatest number of ATP molecules formed from ADP
(a) Glycolysis
(b) Krebs cycle
(b) Krebs cycle
(c) Conversion of pyruvic acid to acetyl CoA
(d) Electron transport chain.
(d) Electron transport chain.
Answer: D
Question. How many molecules of NADH2 are produced when four molecules of phosphogyceraldehyde arc converted into four molecules of pyruvate
(a) 8
(b) 2
(c) 4
(d) 6
(b) 2
(c) 4
(d) 6
Answer: C
Question. The overall goal of glycolysis, Krebs cycle and electron transport system is the formation of
(a) ATP in one large oxidation reaction
(b) Sugars
(b) Sugars
(c) Nucleic acid
(d) ATP in small steps
(d) ATP in small steps
Answer: D
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